europa_simp.pic (pics format) Global mosaic Simple Cylindrical
europa_simp.raw (raw file - no labels) Global mosaic Simple Cylindrical
europa_sinu.pic (pics format) Global mosaic Sinusoidal
europa_sinu.raw (raw file - no labels) Global mosaic Sinusoidal
eur_hi_orth.pic (pics format) High Resolution Mosaic - Orth projection
eur_hi_orth.raw (raw file - no labels) High Resolution Mosaic - Orth projection
eur_hi_simp.pic (pics format) High Resolution Mosaic - Simp projection
eur_hi_simp.raw (raw file - no labels) High Resolution Mosaic - Simp projection
eur_g1_grid.pic (pics format) G1 observation of Europa - Orthographic with lat/lon grid
eur_g1_grid.raw (raw file - no labels) G1 observation of Europa - Orthographic with lat/lon grid
eur1h.vic first 3 Europa frames mosaicked
Europa-RED-GRN-VIO.jpg visible and infrared Europa color images
Europa-968-889-756.jpg visible and infrared Europa color images
europa.mos_flt_st Europa 2 X 2 mosaic with a high pass filter applied
eurfilt.vic Europa 4-image controlled mosaic with filters to enhance detail.
europa.red color-ratio composite merged with filtered red image
europa.grn
europa.blu
g1dlr_europa_color_1.red color VICAR image of Europa
g1dlr_europa_color_1.grn for Category B release
g1dlr_europa_color_1.blu
g1dlr_europa_color_1.txt possible Cat.-B Text caption
europa_full_756-grn-vio.jpg color jpg image of Europa (Geissler)
europa_full_968-756-vio.jpg color jpg image of Europa (Geissler)
g1dlr_euro_col_2*.* proposed category B release
g1dlr_euro_col_3.* color frame of Europa
g1dlr_euro_col_4.* color frame of Europa
europa_voy_stereogrid.vic stereographic europa projections of voyager
europamos_stereogrid.vic same with Galileo frames added in
g2dlr_euro_prelim3.* Europa G2 color frame
g2dlr_euro_prelim.red, grn, and blu Europa G2 color frame(outdated)
europa_G2.jpg reconstructed version of the Europa G2 color image
g2dlr_europa_color.red, grn, blu Europa G2 "true" and false color composites
europa_voygal.sinu* global mosaic w/ Voy and Gal G1 and G2 Europa coverage
c3brn_eur_sumstrip.vic superposition of the two high res C3 Europa framelets
c3brn_eur_im8strip.vic on G1 Europa and on Voyager respectively
c3jpl_eur_wedge1.bw galsosed and stretched versions of wedge images
c3jpl_eur_wedge2.bw
c3jpl_eur_wedge3.bw
eur_c3_mos.tif mosaic of C3 Europa with Voyager in background
eurcra.ps crater frequency plot
wedge.vic latest Europa wedge, filtered to remove noise and pixelation.
Step*.tif reconstructed wedge images
eur_35_context.vic;1 s0374685100 mosaicked within part of s0374667300
eur_35_context.vic;2 s0374685100 and s0374685139 mosaicked within part
of s0374667300
e4asu_eur_34m_cut.bw Europa, possible press releases
e4asu_eur_630m.bw
e4asu_eur_630m_cut.bw
e4jpl_eur_darkmaterial.bw Europa, possible press releases
e4jpl_eur_darkmaterial_mos.bw
e4jpl_eur_darkmaterial_mos_cut.bw
e4jpl_eur_macu_374667300_div.bw
e4jpl_eur_macu_374667300_hpf.bw
e4jpl_eur_macu_cut_374667300.bw
e4jpl_eur_macu_cut_374685139.bw
e4jpl_eur_macu_mos.bw
e4lpl_pwyll.vic Preliminary mosaic of 5 global Europa images
e4_hires.mos Preliminary mosaic of E4 highest resolution images
(version 4)
e4g2lpl_pwyll.vic merged E4 - G2 mosaic
e4lpl_pwyll_color.jpg colored version of e4lpl_pwyll
E4hiresmos_cp_1_rec_2.tif reconstruction of the broad lineament diagonally
E4hiresmos_cp_1.tif crossing the northern portion
e4lpl_pwyll2.vic mosaic of 5 global context frames, trailing hemisphere
e4g2g1lpl_pwyll.vic merged E4, G1, G2 mosaic
e4lpl_pwyll_color_final.jpg colored version of e4lpl_pwyll2
e6_drklin.vic updated 5-frame mosaic of Dark Linea
e6_crater.vic updated 2-frame mosaic of Crater
e6_brtpln.vic mosaic of the E6brtpln
e6_plains02_v1.vic E6 Europa high res mosaic of brtpln02
e6_crater02.vic mosaic of crater02
e6_craters.vic shows placement of crater02 within crater01 mosaic
e6_brtpln_v3.vic three out of the four frames are complete
e6_crater02_v3.vic all frames are complete
e6_drklin_v4.vic Mosaic of dark lineas from E6
e3wedges_vgr.vic C3 wedges image set into a reprojected Voyager frame
g2lpl_global_color.vic G2 Europa global color image, possible press release
e6lpl_drklin.vic Europa E6 DRKLIN mosaic
Tyre.vic G7 Tyre Macula color composite
e6lpl_colordrklin.tiff merged E6 drklin color image
airglow.vic comp. of G7 eclipse image w. comb. Galileo and Voyager albedo
G7ESECLIPS01.red .grn .blu false color of clear G7 eclipse
E6_SYNCOLOR_BLUE2.TIFF final vession of Science cover
01797icerafts.tif Europa E6 Ice Rafts in b/w
c9paul_g2tilmann_europa.vic comparison of 2 global Europa images
g7dlr_europafeatures_1.vic Features of Europa from G7 orbit
g7dlr_europafeatures_2.vic same as above
g7dlr_europafeatures_3.vic same as above
(NOTE: The above 4 color images cannot be displayed properly using XVD.
You need to use VIDS or Photoshop)
E6_EUROPA_BRTPLN2.VIC E6 Europa Bright Plains 2 Mosaic and context mosaic
E6_EUROPA_BRTPLN2_CXT.VIC
e4dlr_gem_targets.vic b/w compilation of eight Europan surface areas
e4dlr_gem_targets.tif e4dlr_gem_targets.vic w/ arrows added by Kadel
e11_brn_grayband.vic gray band in the new E11 Europa regional frames (s0420619252 and 9265)
e11lpl_colors01.vic E11 COLORS01 vicar image
e11lpl_colors02.vic E11 COLORS01 vicar image
colors01-756-grn-vio-edit2.jpg E11 COLORS01 3-color composite
colors01-968-grn-vio-edit2.jpg E11 COLORS01 3-color composite
colors02-756-grn-vio-edit2.jpg E11 COLORS02 3-color composite
colors02-968-grn-vio-edit2.jpg E11 COLORS02 3-color composite
E18DLR_GLL_FLYBY.TIFF DLR superposition of orbiter and Jupiter above Europa
E11_Europa_Hires.vic E11 preliminary Hi-resolution Europa mosaic
E11_Europa_Hires2.vic E11 Hi resolution Europa mosaic
E11_Europa_Hires2_L1copy.tif E11 Europa reconstruction
E11_Europa_Hires2_L3copy.tif E11 Europa reconstruction
756-grn-vio_s.jpg E12 Europa (Agenor color image)
968-grn-vio_s.jpg E12 Europa (Agenor color image)
968_on_grn.jpg E12 Europa color ratio
e12drklin.red preliminary E12 dark linearment (756 nm filter)
e12drklin.grn same in green filter
e12drklin.blu same in violet flter
dlr_e11regmap.mos Mercator mosaic of 11ESREGMAP01 (vicar)
e11LPL_regmap.vic E11 regmap mosaic
e11LPL_regmap_cxt.vic Context image of the above
Chaos_stereo.tif Preliminary E12 Conamara Chaos mosaic
e12_e6_prelim1.readme E12/E6 high res mosaic
e12_e6_prelim1.vic
dlr_e12chaos_stereo1.pict three preliminary stereo products of 12ESCHAOS01
dlr_e12chaos_dtm1.hlf
dlr_e12chaos_ortho1.byt
e12_wedge.readme e12 stereo images in the wedges region
e12_wedge_left.tif
e12_wedge_right.tif
e3wedges.liz C3 Wedges image with one set of missing lines filled in
e4callan.liz E4 Callanish Macula mosaic
wedges_perspec_1.vic perspective view of wedges 01/02 area
pwyll20.vic Pwyll viewed from 20 deg elevation: height color coded
pwyll20bw.vic Same but no color coding (use XVD to open)
pwyll35.vic Pwyll viewed from 35 deg elevation: height color coded
pwyll35bw.vic Same but no color coding
pwyll45.vic Pwyll viewed from 45 deg elevation: height color coded
pwyll45bw.vic Same but no color coding (use XVD to open)
wedges35.vic wedges 01/02 area viewed from 35 deg elevation: color coded
wedges35bw.vic Same but no color coding
e12edge0102_dtm.hlf stereo products from DLR
e12edge0102_ortho.byt
e12edge0102_ortho.pict
Pwyll_ana.vic
wedges_e12_ana.vic
e12_2pwyll.vic e12 mosaics from Klem
e12_6chaos.vic
e12pwyll.vic
pwyll_e12.cub pwyll stereo products from Gregory Hoppa at LPL
pwyll_e6.cub
pwyll_stereo.tif
e12_3wedges.vic e12 mosaic from Klem
Pwyll_redblue.vic red - blue anaglyphs, pwyll and wedges
Wedges_redblue.vic
E12-wedges-draft.avi DRAFT video with a flight over our wedges01/02 DTM
E12-wedges-draft.mac
dlr_e12chaos_cntxt_pass1.mos E12 Conamara Chaos 10m/pix in E6 context (vicar)
dlr_e12wedge02_c3_cntxt.vic mosaic of 12ESWEDGES02 in C3 context
e6e12_pwyll_orth_anagl_blue.vic Pwyll red-blue anaglyph image
pwylln_color_new.vic color-coded stereo model of Pwyll
E12_Wedges_15M.vic Europa Wedges 15M mosaic
E12_Wedges_15M_E12_context.vic Europa E12 Wedges mosaic
E12_Wedges_E12_C3_context.vic Europa Wedges E12_C3_context mosaic
E12_Wedges_E12_C3_30M_context.vic Europa Wedges E12_C3_30M context mosaic
e12_wedge2_25M.vic Europa wedge2 25M mosaic
e12_wedge2_cxt.vic Europa E12 wedge2 mosaic
Ncumplot_E12_1.VIC DLR cumulative frequency diagrams
Ncumplot_E12_2.VIC
Ncumplot_E12_3.VIC
e12pwyllnimssi.tif first cut of SSI/NIMS Pwyll map
e12craters.crc.gif Europa crater plot containing E12 data (Chapman group)
(image renamed e12craters_crc.gif)
e12craters.crc2.gif Another Europa crater plot (Chapman group)
(image renamed e12craters_crc2.gif)
e12pwyllnimssi.tif updated E12 Pwyll map
(image renamed e12pwyllnimssi_2.tif)
1913.vic products for E12 press conference
1939.vic
1952.vic
2378.vic
2825_28.tif
2828.vic
2842.vic
2846.vic
e12_2pwyll.vic
europa_prov_chaos.tif
pwylln_color_new.vic
DLR_stereo_loc.tif outline of DLR stereo model area in C3 Wedges frame
pwyll_persp_col_15504.tiff perspective view of Pwyll (frame s0383715504)
pwyll_persp_col_68700.tiff same as above but frame s0426268700)
pwyll_ortho_col.tiff Orthophotos of Pwyll with color indicating heights
DRL_E12CHAOS_PASS1COUNTS.VIC E12 pass 1 mosaic of Europa Conamara Chaos
Ncum_e12.pct PICT format Cumulative and R-plots
Nrel_e12.pct
Ncum_e6_e12_1.pct
Nrel_e6_e12_1.pct
Ncum_e6_e12_2.pct
Nrel_e6_e12_2.pct
Ncum_e6.pct
Nrel_e6.pct
E12DLR_Chaos_Color_1.tiff SW part of Europa high res DarkLinColor mosaic
e12eswedges03mos.pict Preliminary E12 wedges03 mosaic (Photoshop pict)
E11DLR_2nd_family_portrait.tiff 4 Galilean satellite+Amathea+Thebe+Metis+Adrastea
(in Callisto.products directory)
C9_Europa_PG_enhTD.tiff C9 globals: natural and enhanced
dlr_e12wedge03_c3_cntxt.mos E12 wedge_03 in C3 context
dlr_conamara_chaos_e12_cntxt.mos Mosaic of Conamara chaos in E6 context
s0426272849.rec.tiff 3 Northernmost E12 Wedge02 frames
s0426272853.rec.tiff supposedly w/ tire tracks fixed
s0426272856.rec.tiff
e6drklin_color.tif E6 drklin mosaic by Phillips for Nature cover (final)
e3wedges.liz From Klem for C3 Wedges but with missing data interpolated
e14mann.vic preliminary version of the new E14crater01 color images of the crater Mannann'an
e14shadowship.tif higher-resolution transect of Mannann'an
E14MANN2.HICOLOR$5NTIF e14mann2.hicolor.tif is and improved version of e14shadowship.tif
e14mann_hi.vic mosaiced the hires frame into the green frame of the lower-res color
e14_brn_mann_stereo.tif preliminary red-blue stereo anaglyph of the E14 Mannann'an frames
e14_brn_mann_stereo_pr.tif Crop of above to match e14shadowship.tif for releases
E14_tyre_add.tif From Moses Milazzo preliminary mosaic from E14 tyre in tif and three band vicar
tyre_968.vic, _grn.vic, _vio.vic
e14esdrkspt_anaglyph_rg.tiff preliminary anaglyph version of E14 dark
spot color/stereo target area From Roland Wagner
darkspotstereo.red, darkspotstereo.grn, darkspotstereo.blu
red/blue version of above from Thomas Roatsch and Uli Koehler
darkspotstereo.red2, darkspotstereo.grn2, darkspotstereo.blu2
MIPS brightened/stretched version of darkspotstereo.red ...
e12e14wedgestereo.* stereo of the e12/e14 "wedges"
e12e14wedgestereofr.* stereo of the e12/e14 "wedges" w/frame
E6 images in context from Klem for releases
E6MOSAICS.TIF E6 Pwyll and Drklin in E2 global
E6PLAINS.TIF 2 hi-res. plains mosaics in E6 Drklin
e4callen.man, *.str E4 Callanish mosaic `cleaned up' from Klem 5/98
str is the full one; man is a subset (no email below)
DLR_E12WEDGE01_03_CNTXT.MOS 12ESWEDGE_01 in context with 12ESWEDGE_03
E14WEDGES.VIC Wedges: s0440955226.1 Picno 48 reprojected by Klem
E12_STEREO_DRIDGE.TIF
E12_STEREO_DARKBAND.TIF
E12_WEDGES_STEREO_LEFT.TIF
E12_WEDGES_STEREO_RIGHT.TIF
e12_stereo_15m_50m.tif From Hoppa E12 wedges region at 15 meters and 50 meters
per pixel
e14mannhires.vic From Phillips E14 crater2 (Mannann'an)
e14mannhires_cxt.vic Above on top of green lower resolution context
e14_lpl_mann_stereo.tif From Hoppa, anaglyph of western rim of Mannann'an
e14_lpl_mann_stereo_crop.tif Cropped for PR purposes
E14_tyre_968.vic, *_grn.vic, *_vio.vic From Moses Milazzo, E14 Tyre color mosaic
E14_tyre_color.jpg Above, but combined into a jpeg by Moses
E14_tyre_clear.vic From Milazzo, E14 Tyre clear mosaic
E14_tyre_clear.jpg Above converted to jpeg by Moses
E12_Wedges_C3_context.vic From Milazzo, E12 Wedges in C3 context mosaic
manannan_anaglyph.tif From Wagner, E14 Mannann'an stereo
e12pwyll.vic ortho. reprojected green-filter pwyll with violet-filter gap fill
e12_2pwyll.vic March USA Today image with the Pass 2 data included
e12pwyll.* individual filters with data gaps ortho. reprojected and coregistered
e12pwyll_prelim.* quick attempt to "fill the gaps" with data from the other filters
e14wedges_2.vic mosaic of the E14WEDGES data
*****************************************************************
****NOTE: NAME CHANGED TO FROM E14WEDGES.VIC TO ****
****E14WEDGES_2.VIC TO DISTINGUISH IT FROM A PREVIOUS PRODUCT****
*****************************************************************
WEDGES_DTM.VIC_HALF DTM and the ortho photo by Bernd Giese
WEDGES_IMAGE.VIC_BYT
e14trpbnd.vic mosaic of an offset in tripleband by ASU
e14_ganymede_968.vic,
e14_ganymede_grn.vic,
e14_ganymede_vio.vic Global color mosaic from Moses Milazzo
E14_darkspot.vic From Moses Milazzo, Dark Spot Mosaic
e15cilix1.tif From Cynthia Phillips, 'quick' color of E15 Cilix
E14_darkspot_red.vic, *968.*, *grn.*, *vio.* From Milazzo, Dark Spot Color Mosaic
E15regmap01_pass1.vic From ASU (Sarah Fagents), Preliminary (Pass 1) RegMap mosaic
cilix.red, *.grn, *.blu From ASU (Sarah Fagents), processed w/ Hapke correction
E15_G1_vio.vic From Moses Milazzo
E15_G1_grn.vic Preliminary E15 RegMap
E15_G1_red.vic Color composite w/ Paul Geissler's G1 Sciencefigure
E15_G1_756.vic
E15_G1_889.vic
E15_G1_968.vic
E15_regmap.vic and clear filter
e15photom_context.tiff From ASU, Europa Photometry, preliminary of pass 1
e15g1regmap01_pass1_cxt.vic From ASU, E15 regmap in G1 global context
e15_lpl_cilix_stereo1.tif From Greg Hoppa, preliminary stereo
e15_lpl_cilix_stereo1_left.tif individual stereo of left
e15_lpl_cilix_stereo1_right.tif individual stereo of right
Search on the following email messages by file name for more information.
############################################################################
############################################################################
>From tbecker@flagmail.wr.usgs.gov Fri Apr 19 18:27:38 1996
To: all_hiips@noao.edu
Subject: VGR europa mosaic available
X-Sun-Charset: US-ASCII
The voyager control base mosaic for europa is complete!!
The final products are available on our ftp site:
ftp -i ftpflag.wr.usgs.gov
username: ftp
password: (your e-mail address)
ftp>cd pub/outgoing
ftp>binary
ftp>get (filename)
**NOTE to PICS users: Sinusoidal projection is the only projection
compatable between ISIS and PICS. All files were processed in
ISIS. If you want to reproject in PICS you will have to use the
file that is in sinusoidal projection mentioned below. **
**NOTE** The north and south poles have been "trimmed" off for
the purpose of avoiding any chance of misinterpetation of
erroneous data. High resolution coverage at the south pole was
retained because of the quality of data.
If there are any problems please e-mail tbecker@flagmail.wr.usgs.gov
Description/filenames of final products available (three formats) -
1) Global mosaic - hires/lowres merged
Filenames: europa_simp.cub (isis format)
europa_simp.pic (pics format)
europa_simp.raw (raw file - no labels)
Description:
Projection: Simple Cylindrical
kilometers/pixel scale: 4.0
latitude range: -90.0, 90.0
longitude range: 0.0, 360.0
center latitude: 0.0
center longitude: 180.0
bit type: 8 (byte)
number of lines: 1226
number of samples: 2453
2) Global mosaic - hires/lowres merged
Filenames: europa_sinu.cub (isis format)
europa_sinu.pic (pics format)
europa_sinu.raw (raw file - no labels)
Description:
Projection: Sinusoidal
kilometers/pixel scale: 4.0
latitude range: -90.0, 90.0
longitude range: 0.0, 360.0
center latitude: 0.0
center longitude: 180.0
bit type: 8 (byte)
number of lines: 1226
number of samples: 2453
3) High Resolution Mosaic - Orth projection
Filenames: eur_hi_orth.cub (isis format)
eur_hi_orth.pic (pics format)
eur_hi_orth.raw (raw file - no labels)
Description:
Projection: Orthographic Projection
kilometers/pixel scale: 1.0
latitude range: -90.0, 70.0
longitude range: 135.0, 230.0
center latitude: -22.0
center longitude: 128
bit type: 8 (byte)
number of lines: 3123
number of samples: 3123
4) High Resolution Mosaic - Simp projection
(With this version the low resolution mosaic was scaled to
1.0 km/px and placed underneath the high resolution mosaic)
Filenames: eur_hi_simp.cub (isis format)
eur_hi_simp.pic (pics format)
eur_hi_simp.raw (raw file - no labels)
Description:
Projection: Simple Cylindrical
kilometers/pixel scale: 1.0
latitude range: -90.0, 70.0
longitude range: 135.0, 230.0
center latitude: -10.0
center longitude: 180.0
bit type: 8 (byte)
number of lines: 4361
number of samples: 2550
A sinusoidal projection of the hi-res mosaic can be made
available upon request.
5) One G1 observation of Europa - Orthographic with lat/lon grid
(The north pole has been filtered with a low pass filter
to replace the null data)
center latitude/center longitude = subspacecraft lat/lon for g1
Filenames: eur_g1_grid.cub (isis format)
eur_g1_grid.pic (pics format)
eur_g1_grid.raw (raw file - no labels)
Description:
Projection: Orthographic
Kilometers/pixel scale: 4.0
latitude range: -90,90
longitude range: 0,360
center latitude: 23.38
center longitude: 217.47
bit type: 8 (byte)
number of lines: 781
number of samples: 781
#########################################################################
From: Alfred McEwen (GD.Flagstaff) (520)556-7194
Received: by masursky.wr.usgs.gov (8.7.5) id LAA22556; Tue, 30 Jul 1996 11:27:29 -0700 (MST)
Date: Tue, 30 Jul 1996 11:27:29 -0700 (MST)
Message-Id: <199607301827.LAA22556@masursky.wr.usgs.gov>
To: all_hiips@noao.edu
Subject: Europa G1 mosaic
X-Sun-Charset: US-ASCII
Status: R
Cynthia Phillips processed and mosaicked the first 3 Europa
frames; I added an edge-enhancement filter. Image
is on rushmore /home/ssi/review/eur1h.vic
(Vicar format).
########################################################################
>From ssi_science-request@noao.edu Wed Jul 31 12:50:46 1996
To: ssi_science@noao.edu
Subject: Europa color composites
X-Sun-Charset: US-ASCII
Quick-look (jpeg) versions of the visible and infrared Europa color images
are in /home/ssi/review as Europa-RED-GRN-VIO.jpg and Europa-968-889-756.jpg.
These were GALSOSed with VICAR and then registered and despiked with ISIS.
I'll upload the individual frames as soon as I find the isis2vic program
that Larry mentioned.
Paul Geissler
########################################################################
>From amy_culver@iplmail.jpl.nasa.gov Wed Jul 31 13:00:26 1996
Subject: Europa mosaic
To: "Mike Belton"
Cc: "Helen Mortensen"
X-Mailer: Mail*Link SMTP-QM 3.0.2
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"; Name="Message Body"
Content-Transfer-Encoding: quoted-printable
Hi Mike,
Ken Klassen and Ron Greely told me you were interested in seeing the =
Europa 2 X 2 mosaic with a high pass filter applied to pull up the =
terminator. I have generated this mosaic, and it is available for ftp =
from the MIPS internal ring: /project/ssi1/joo/tmp/europa.mos_flt_str
Ron seemed to think it looked good, and it's going into the PIO queue for =
consideration to be used for the press conference.
Enjoy,
Amy
#######################################################################
>From ssi_science-request@noao.edu Thu Aug 1 13:25:17 1996
To: ssi_science@noao.edu
Subject: Io and Europa products
X-Sun-Charset: US-ASCII
On Rushmore /home/ssi/review are the following:
eclipse.red, eclipse,grn, eclipse.blu
too_hot_for_europa Io eclipse image cleaned up and
color-coded. For your eyes only. Vicar format
eurfilt.vic (vicar) and eurfilt.cub (ISIS)
Europa 4-image controlled mosaic with filters
to enhance detail. Processing by Cynthia Phillips
and myself.
Alfred
####################################################################
From: Alfred McEwen (GD.Flagstaff) (520)556-7194
Received: by masursky.wr.usgs.gov (8.7.5) id LAA04799; Mon, 5 Aug 1996 11:53:48)
Date: Mon, 5 Aug 1996 11:53:48 -0700 (MST)
Message-Id: <199608051853.LAA04799@masursky.wr.usgs.gov>
To: all_hiips@noao.edu
Subject: Europa color /Class A
X-Sun-Charset: US-ASCII
Status: RO
A Europa color-ratio composite merged with filtered
red image is available on Rushmore /home/ssi/review
europa.red, europa.grn, europa.blu, vicar format.
Red is red/vlt ratio
Grn is red/1MC ratio
Blu is vlt/red ratio
each merged with red image after combo of filters
to enhance topographic and albedo information.
Images recieved special noise-removal filters
prior to ratios.
Alfred
####################################################################
>From DENK@omega.pe.ba.dlr.de Tue Aug 20 08:49:52 1996
To: eliz@noao.edu
Cc: NEUKUM@kappa.pe.ba.dlr.de, JAUMANN@kappa.pe.ba.dlr.de,
DENK@kappa.pe.ba.dlr.de
Subject: Europa color image / urgent
Hello Liz:
On Rushmore, directory
/export/home/tbd,
there is a new color VICAR image of Jupiter's moon Europa.
The names of the three B/W files are
g1dlr_europa_color_1.red
g1dlr_europa_color_1.grn
g1dlr_europa_color_1.blu
The name of the possible Cat.-B Text caption can be found in file
g1dlr_europa_color_1.txt
We would like to ask you to select this image as a Category B release.
It is very important for us to get a quick answer because Gerhard Neukum
has the possibility to submit it to a big German weekly magazine (named FOCUS)
which might add it to an article about Galileo which will appear next Monday.
Thank you very much in advance for your help, and viele Gruesse,
Tilmann
Subj: Europa color
Quick-look (jpeg) versions of the full frame Europa color data are available
on rushmore in /home/ssi/review as Europa.full.756-GRN-VIO.jpg and
Europa.full.968-756-VIO.jpg. The data are available in /home/peg/europa2
as europa2.cub.Z, in the same isis format as the previous half-frame images
(i.e., VIO-GRN-RED-756-889-968) and likewise GALSOSED using the operational
defaults, and then despiked and coregistered with isis. Also in
/home/peg/europa2 are losslessly compressed versions of the jpeg composites.
Paul Geissler
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>From DENK@gamma.pe.ba.dlr.de Fri Aug 30 06:19:05 1996
To: belton@jupiter.tuc.noao.edu, veverka@cuspif.tn.cornell.edu,
greeley@atlas.la.asu.edu
Cc: NEUKUM@terra.pe.ba.dlr.de, DENK@terra.pe.ba.dlr.de
Subject: Europa color frames on Rushmore
===============================================================================
From: Tilmann Denk, Gerhard Neukum
To: Mike Belton, Joe Veverka, Ron Greeley
Subj: Europa color frames on Rushmore
Date: 30-Aug-1996
===============================================================================
Hello Mike, Joe, and Ron:
There are three new image "groups" of Europa color vicar images on the Rushmore
/home/ssi/review
directory. I have put them on Rushmore in agreement and on behalf of Gerhard
Neukum, who is on vacation until early September.
The file names are:
g1dlr_euro_col_2*.* (7 Vicar files + 1 Textfile)
g1dlr_euro_col_3.* (3 Vicar files: red, grn, and blu)
g1dlr_euro_col_4.* (3 Vicar files: red, grn, and blu)
-----
g1dlr_euro_col_2*.*:
These images are proposed to be selected for category B release as a possible
"Europa color week". Possible figure captions are given in the file
G1DLR_EURO_COL_2_WEEK.TXT.
- The first image, which might be released on a Monday, would be
"G1DLR_EURO_COL_2_MON.VIC". It shows a violet image of Europa.
- The "Tuesday frame", G1DLR_EURO_COL_2_TUE.VIC, contains a 1MC filter image.
- On Wednesday, frame G1DLR_EURO_COL_2_WED.VIC shows a color ratio of these two.
- The Thursday frame, G1DLR_EURO_COL_2_THU.VIC, is a NIR filter frame and
the precursor of
- the Friday frame (G1DLR_EURO_COL_2_FRI.RED, G1DLR_EURO_COL_2_FRI.GRN, and
G1DLR_EURO_COL_2_FRI.BLU for three color channels), which is an approximately
true color frame of this area on Europa. It is a combination of the NIR
image from Thursday for the red channel, the violet image from Monday as
the blue channel, and a 50-50 combination of both used for the green channel.
g1dlr_euro_col_3.*:
Three files, G1DLR_EURO_COL_3.RED, G1DLR_EURO_COL_3.GRN, and
G1DLR_EURO_COL_3.BLU can be combined to a color frame of Europa. The left
part shows a "true" color view of this area, while the right image contains
a combination of three color ratios (1MC/NIR, GRN/VLT, VLT/NIR as the red,
green, and blue channel, respectively). The filter selection for the left
and the right images is similar to the filter selection of our Ganymede
file (GANYCOLOR2.* files) on Rushmore.
g1dlr_euro_col_4.*:
The three files G1DLR_EURO_COL_4.RED, G1DLR_EURO_COL_4.GRN, and
G1DLR_EURO_COL_4.BLU may also be combined to a Europa color frame. The
red channel contains a 1MC, the green channel a NIR, and the blue channel
a VLT frame, all histogram-stretched and filtered. The result is a false
color frame which shows a lot of details on the surface. (This image is
currently my favorite Europa image.)
We would like to offer these images to the SSI Team and feel that they might
be selected as cat.-A or cat.-B releases, or for an upcoming publication.
For the possible case of a selection, we would be happy to provide a draft
for a figure caption.
Viele Gruesse from Berlin,
Tilmann
Subj: europa
I have placed two files in Rushmore that show the vague ringed
structure that I talked about in our abstract for the Europa ocean
conference. Each file is in three separate formats for ISIS (.cub),
VICAR (.vic) and tiff (.tiff). Both versions are stereographic with
central coordinates of 25S, 200W. One file is the Flagstaff global
mosaic of Europa reconfigured in a stereographic projection. The
second mosaic has the Galileo four-frame mosaic added in. THESE ARE
VERY CRUDE PRODUCTS. I had wanted to delay distribution until I had
some more cosmetically pleasing products, but there appears to be
some interest in immediately seeing what we have.
The files are in RUSHMORE
/home/ssi/review
-rw-r--r-- 1 sxa gllssi 3626496 Oct 3 10:47 europa_voy_stereogrid.cub
-rw-r--r-- 1 sxa gllssi 3580865 Oct 3 11:03 europa_voy_stereogrid.tiff
-rw-r--r-- 1 sxa gllssi 3582117 Oct 3 10:47 europa_voy_stereogrid.vic
-rw-r--r-- 1 sxa gllssi 3630080 Oct 3 10:47 europamos_stereogrid.cub
-rw-r--r-- 1 sxa gllssi 3582117 Oct 3 10:47 europamos_stereogrid.vic
-rw-r--r-- 1 sxa gllssi 3580865 Oct 3 11:11 europamos_stereogrid.tiff
The black areas at top and bottom are areas at the poles where we
have no data. The latitude-longitude grid is in 20 deg increments.
There are obvious artifacts in the mosaic that are caused by limbs
and terminators in both the Voyager and and Galileo images. Despite
these artifacts, I believe that you can readily see the bulls-eye
effect. The arcs are caused mostly by triple bands to the north and
by the boundaries between mottled and non-mottled areas to the east.
The center of the bulls-eye is that crackled terrain in the southern
part of the area imaged by Galileo. You can see very distant arcs
near ths north pole and over the south pole. A note of caution on
stereographic projections. While small circles on a globe convert to
circles on the projection, the true centers of the circles are
slightly offset from the apparent centers in the projection
Before releasing this I had wanted to do better processing to bring
out what is in the dark area to the west. This is under way. Frank
Chuang, who recently received his Bachelors in Geology from San Jose
State, is doing the image processing. He is fairly new to the game
but is learning fast.
#########################################################################
Dear Ron, and other "Europhiles":
The so far available parts of the 1 micron filter image have been compiled to
a preliminary version of our Europa G2 color frame.
The vicar files g2dlr_euro_prelim3.red, grn, blu
in Rushmore's directory /export/home/tbd
show an enhanced and filtered version with the 1MC filter as the red, the
GRN filter as the green, and the VLT filter as the blue channel. The still
missing data (1 gap in each filter) have been filled by data from the VLT
or GRN filter and appear as B/W stripes in the image.
Short, preliminary description:
The "disappearance" of the mottled terrain in the 1 micron filter that has also
be seen before by HST is obvious. Only the bright crater at 26S, 271W ("Pwyll")
is clearly visible. It shows a "spider-like" appearance, reminding to a
volcano on Earth with rivers running down from the center. Is it possible
that liquid water has created this structure??
After image enhancement, additional features are visible in the 1MC image,
like the dark circular feature near 15S,335W; "1MC-inversed" bands in the
polar regions, only few linea within the mottled terrain, and the outlines of
areas within the mottled terrain that are also brighter than their surrounding
terrain in the visible wavelengths.
The photometric effects of high incidence/emission angles can be seen very
well, too. The higher the incidence/emission angle, the bluer is the
disk of Europa. It might be difficult to extract spectra or albedo measurements
from these images without proper photometric correction.
The mottled terrain shows different color units. The reddest color is seen
near the eastern limb (anti-Jovian side, the area that has been covered by
G1 clear filter imaging), decreasing towards west to rather brownish hues
(in this false color version of the image) at the Jupiter-facing hemisphere.
Interestingly, one of the darker areas in the violet and green frames, the dark
area at the very western edge of the image, is also dark in the 1MC filter
creating a dark-bluish color here, while the mottled terrain appears reddish
brownish. A major cause of this should be the photometric effects, but there is
such a big difference to the surrounding terrain at the east that also the
possibility of different surface materials might be considered.
For the circular feature near 15S,335W, the "moat" around the center is
darker in all three filters than the central material.
So far a preliminary description of the color contents of the G2 Europa
photometry frame.
Viele Gruesse from Berlin,
Tilmann
From: Tilmann Denk
To: GREELEY@atlas.la.asu.edu
CC: ssi_science@noao.edu, DENK@terra.pe.ba.dlr.de
Message-ID: <961025231514.2500049a@terra.pe.ba.dlr.de>
Subject: G2 Europa 3-color frame
######################################################################
****OUTDATED BY LATER RELEASE***
>From ssi_science-request@noao.edu Wed Oct 23 13:48:41 1996
To: ssi_science@noao.edu
Cc: DENK@terra.pe.ba.dlr.de
Subject: Europa G2 color
Dear friends of Europa:
A preliminary false color composite of the G2ESPHOTOM01's green and violet
filter images has been put on the Rushmore directory
/export/home/tbd
The filenames are
g2dlr_euro_prelim.red, grn, and blu;
file format is vicar.
The image (as some kind of "appetizer") gives a slight indication about what
we might expect to get when the remaining G2 Europa data will be on the
ground. Enjoy it!
Tilmann
****OUTDATED BY LATER RELEASE***
##########################################################################
>From ssi_science-request@noao.edu Fri Nov 1 14:19:26 1996
To: ssi_science@noao.edu
Subject: Europa G2 color image
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
A reconstructed version of the Europa G2 color image (with missing data
filled in using ISIS bndsynprc program) has been placed on rushmore in
/home/peg/G2 as "europa_G2.jpg". Also at this location is the .cub file
with data gaps left in. The jpeg image can also be seen at url:
http://www.lpl.arizona.edu/hiips/Projects/Jupiter/Europa/Europa_Color/Images.html
Cheers, Paul
############################################################################
****OUTDATED BY LATER RELEASE***
>From DENK@gamma.pe.ba.dlr.de Tue Nov 5 04:01:38 1996
To: greeley@atlas.la.asu.edu, sullivan@atlas.la.asu.edu, belton@noao.edu
Cc: veverka@cuspif.tn.cornell.edu, eliz@noao.edu,
geissler@amalthea.lpl.arizona.edu, NEUKUM@terra.pe.ba.dlr.de,
DENK@terra.pe.ba.dlr.de
Subject: Re: G2 Europa color release to the public
Hello Ron, Rob, et al.:
On Rushmore's directory /home/ssi/review
the vicar files g2dlr_europa_color.red, grn, blu
(with a size of about 2.6 MB each)
contain two versions of the G2 Europa violet and 1MC filter data: The left
image shows rather "natural" colors, while the frame on the right shows a
false color image where the colors have been somewhat adapted to the ones
that can be found in Paul Geissler's G1 Science Magazine Europa composite.
The green channel of the vicar image is a composite of VLT and 1MC data to
simulate at some degree the missing NIR filter. GRN filter data have not been
used so far because of the data gap close to the most interesting area in the
frame (Pwyll). This will be changed when we know more about the status of
the missing data, probably not before the Ocean Conference. The attempt to
simulate Paul G.'s colors is not affected very much by this because Paul
used the 1MC, NIR, and GRN data for his G1 frame, and the G2 sequence doesn't
contain NIR data at all so that all attempts to create similar colors
cannot be perfect. But, in my opinion, the hues are rather close to the
colors from Paul's G1 frame.
The next e-mail contains a small discussion about what the colors mean and
about a few special features. A suggestion for possible color imaging in E6
will also be given in the next e-mail.
Viele Gruesse from Berlin,
Tilmann
****OUTDATED BY LATER RELEASE***
##########################################################################
****OUTDATED BY LATER RELEASE***
>From ssi_science-request@noao.edu Tue Nov 5 04:26:24 1996
To: ssi_science@noao.edu
Cc: DENK@terra.pe.ba.dlr.de
Subject: Europa G2 "true" and false color composites
Dear Europhiles:
On Rushmore's directory /home/ssi/review
the vicar files g2dlr_europa_color.red, grn, blu
(with a size of about 2.6 MB each)
contain two new versions of the G2 Europa violet and 1MC filter data: The left
image shows rather "natural" color, while the frame on the right shows a
false color image where the colors have been somewhat adapted to the ones
that can be found in Paul Geissler's G1 Europa composite.
The white and bluish hues in the false color version indicate purer ice,
while the brownish-reddish hues are a property of the mottled terrain,
triple and other bands, maculae, crater interiors (bigger craters like Pwyll),
wedge-shaped bands, etc. and might represent "dirty" ice. The mottled terrain
area on the upper right which has been imaged in color also during G1 seems
to appear somewhat darker/"brownisher" than the mottled terrain at the center
or western latitudes in the G2 image. Therefore, its general appearance is
somewhat brighter in the G2 frame than in Paul G.'s G1 image.
In G1, the northern ("polar") part of the color frame shows a lot of bluish
hues due to "purer" ice. A similar situation also exists in the southern
hemisphere of Europa's trailing side, close to the south pole, and also
partly extending up to mid-latitudes (especially at western longitudes).
Between Pwyll and the south-eastern limb (at about 5-o-clock position), two
additional crater candidates are visible. One is very close to the limb,
and the other is about mid-way between Pwyll and the limb. Both have darker
interiors and a slightly brighter halo, somewhat similar to Pwyll. But for
the crater at the edge, the center is not brownish but rather bluish. Although
the limb-darkening due to photometric properties of Europa might play a role
for the increasing of the blue hue towards the limb, this seems not to be
sufficient to explain this "blue spot". In the VLT image, it is virtually not
visible at all, but in the 1MC frame, it appears as a prominent dark spot.
A possible explanation might be that this blue spot is a younger crater,
forgotten to be covered by frost particles from possible geysir-like eruptions
or whatever is the responsible process for the fact that the 1MC appearance
of Europa's trailing side is so uniform.
Very close to this blue spot, in the north-eastern direction, there is also
a "blue band", which remarkably differs in its spectral behavior from the
surrounding area, e.g. the brownish band very close to it in the north-
eastern direction. It might also be interpreted as beeing a younger feature.
[ Ron and Rob: The area covering Pwyll, the "blue band" and the "blue spot"
might be a nice 4-6-color regional-res. target for E6 imaging. It contains
"regular" south polar ice, mottled terrain and a triple band (Phinaus Linea)
as well as "unusual" "Pwyll-center" and "Pwyll-environment" material, and
the "bluish stuff". ]
Viele Gruesse from Berlin,
Tilmann
****OUTDATED BY LATER RELEASE***
###########################################################################
>From all_hiips-request@noao.edu Wed Nov 6 10:31:12 1996
To: all_hiips@noao.edu
Subject: Europa mosaic
X-Sun-Charset: US-ASCII
SSI team,
Cynthia Phillips has put together a preliminary
global mosaic with Voyager and Galileo G1 and G2
Europa coverage. The Galileo images are tied to
the Voyager geometry, accurate to about 2 degrees
lat/lon. Scale is 4 km/pixel.
The image is on the ASU ftp site:
ftp to:
atlas.la.asu.edu [that's la is in liberal arts (not one-ay)]
user: gll_hiips
password: (contact Rob or someone else at ASU for this info?)
We will ftp the files to rushmore as well.
The files are europa_voygal.sinu
and europa_voygal.sinu.readme
Alfred and Cynthia
***europa_voygal.sinu.readme****
Info file for europa_voygal.sinu
8-bit ISIS cube, created by Cynthia Phillips at LPL / U. Arizona on 11/5/96.
This image merges the Galileo G1 4-frame clear mosaic I did with the
G2 Europa image (image number s0360063913.2 = violet filter; the only
color we currently have a full image for), and the Voyager hi-res and low-res
mosaics from USGS. Pointing has been tied to the Voyager basemap, and
the overall resolution of the image is 4 km/pixel (the hi-res Voyager and
Galileo have been scaled down).
The image has been processed and filtered to enhance geologic features,
rather than preserve photometry. This would have been impossible given
the range of filters involved. The sinusoidal projection was chosen
so that accurate reprojections of any sort can be made using ISIS.
Please contact Cynthia Phillips (phillips@lpl.arizona.edu) or
Alfred McEwen (mcewen@pirl.lpl.arizona.edu) with any questions or
comments.
***********************
>From myche@acheron.jpl.nasa.gov Thu Nov 7 09:24:33 1996
To: eliz@noao.edu, "Sue LaVoie"
Subject: Re: FWD>Europa file
Cc: "Helen Mortensen"
On Nov 7, 7:15, Sue LaVoie wrote:
> Hi Myche,
> could you convert this ISIS image to VICAR or tiff so that Liz can view it?
> Helen is moving ISIS2VICAR to Rushmore today....could you explain to Liz how
> to do it so that she can convert future frames herself?
> thanks, > sue
OK...The file has been converted to VICAR and placed back in
rushmore:/home/ssi/review/europa_voygal.sinu.vic
I'm sure Helen knows this, but I should reiterate: isis2vic (like all current
VICAR routines) needs 'librtl.so', a shareable library. I took a quick look on
rushmore and only found the librtl.a (the old library).
One of two things will need to happen in order for Liz to run this program on
rushmore:
1. recompile isis2vic and *statically* link in librtl, or
2. copy librtl.so from coda3 to somewhere on rushmore for use with the
existing isis2vic.
Once one of these are picked, I can e-mail Liz how to use this software. The
instructions are similar, but not identical depending on which solution is
used.
Thanks...(there may be other solutions, but that's my quick analysis of the
situation)
Myche
###########################################################################
>From ssi_science-request@noao.edu Thu Nov 7 08:32:54 1996
To: ssi_science@noao.edu
Cc: DENK@terra.pe.ba.dlr.de
Subject: g2dlr_europa_color.*
Dear Europhiles:
An improved (and probably the final) version of our G2 Europa color composite
has been put on the Rushmore directory /home/ssi/review. The old files have
been deleted, the new ones are named
g2dlr_europa_color.red, grn, blu
Format is vicar. The major changes are that the left, "natural" color image
has been replaced by a "enhanced true color" version by request of ASU,
and for the right ("false color") image, the same filters have been used
as Paul Geissler did for the Europa color image in the Science Magazine.
Enjoy it!
Tilmann
>From DENK@gamma.pe.ba.dlr.de Thu Nov 7 07:15:41 1996
To: SULLIVAN@atlas.la.asu.edu
Cc: greeley@atlas.la.asu.edu, bender@atlas.la.asu.edu, eliz@noao.edu,
NEUKUM@terra.pe.ba.dlr.de, DENK@terra.pe.ba.dlr.de
Subject: RE: G2 Europa release
Hi Rob and Ron:
Following your request, I created "revised" versions of the Europa G2 color
composites. I deleted the old files on Rushmore, the new ones are currently
swimming somewhere over the Atlantic towards JPL. There names will be the
same as previously: g2dlr_europa_color.red, grn, blu.
Directory is /home/ssi/review on JPL's Rushmore.
The following changes have been done:
* False color composite, frame on the right: I now used the "same" filters
as Paul Geissler did, and I feel that it now looks really similar to a
printed version of Paul's G1 Science-Mag frame. I found a way to easily
fill in the missing data in the GRN image just using Photoshop. I bet you
will no longer find the gap, except if you ask me how you can see it in the
color frame...
The "NIR" frame used by Paul for G1 is not existing for the G2 data, therefore
I simulated this filter by combining the 1MC and the VLT filter.
* "Enhanced true color" composite, the frame on the left: "Enh. true col" is
a really nice wording for something that is selled as true but indeed isn't.
In my version, I used the NIR (the simulation), the GRN (with gap fill) and
the VLT (the only unproblematic one) filter frames. Therefore, it is indeed
a "true" color image because the filters that are closest to "true" have
been used. For the "false" color, the red channel is a "full-1MC frame" and
therefore really "false". On the other hand, the left frame is an "enhanced"
image due to filtering and histogram-stretch activities. Take a look at it:
Is it "rather true" or "rather enhanced"? I feel the latter is the case, but
if you worry about this, you might easily do the "Tonwertkorrektur" (Command L)
for this frame in the following way: "0 1.3 255" to balance it towards
"true" and away from "enhanced". The value "1.3 is meant
as "1.3 +-0.1", this is a matter of taste. I already checked this proposed
processing step and found that such an operation will not affect at all the
image quality. Feel free to make such changes.
* Both frames: Both have been rotated by 5 deg counterclockwise, so that North
is up. An arrow indicating the north direction has been added. Both frames
are zoomed by a factor of two compared to the raw data, this should be
"rezoomed" for a possible WWW version back to the original size.
Please, tell me if a further revision is still desired. I will send you an
additional mail when the three files have landed at JPL. Enjoy Europa!
Viele Gruesse from Berlin,
Tilmann
########################################################################
The superposition of the two high res C3 Europa framelets on G1 Europa and
on Voyager respectively are now on Rushmore following our problems with the
network at Brown this afternoon.
They are on Rushmore in the directory
/home/rtp/c3
The files are:
c3brn_eur_sumstrip.pict
c3brn_eur_sumstrip.vic
c3brn_eur_im8strip.pict
c3brn_eur_im8strip.vic
-Jim Head and Bob Pappalardo
From: MX%"amy_culver@quickmail384.jpl.nasa.gov" 11-DEC-1996 09:47:33.07
To: MX%"all_hiips@noao.edu"
CC:
Subj: Europa wedge images
Hi everyone,
The following files have been GALSOSed and stretched. In addition, the data
for c3jpl_eur_wedge1.bw (from SCLK 368639400) arrived in several pieces, so it
has been merged into one final image. The files are available from Rushmore
in the /home/ssi/review directory.
c3jpl_eur_wedge1.bw (SCLK 368639400)
c3jpl_eur_wedge2.bw (SCLK 368639414)
The file c3jpl_eur_wedge3.bw (SCLK 368639426) is on the way.
Amy
From: MX%"hoppa@pirl.lpl.arizona.edu" 11-DEC-1996 15:49:57.79
To: MX%"ssi_science@noao.edu"
CC:
Subj: C3 Europa image
I made a mosaic of the new C3 Europa image
with voyager in the backround. The image
is located in:
/home/ssi/review/eur_c3_mos.tif
enjoy,
Greg
From: MX%"cchapman@grendel.space.swri.edu" 11-DEC-1996 17:36:35.02
To: MX%"ssi_science@noao.edu"
Subj: Europa Wedges Craters
A remarkable attribute of the new Europa pictures is the
virtual absence of impact craters (or craters of any kind). There was
debate at the recent Europa Oceans Conference about whether the
10 km diameter "pits" prominent in some portions of our G1 images
were degraded impact craters or, as we proposed (based on size
distributions and the apparent mutual avoidance between pits and
lineaments), endogenic features.
Gene Shoemaker and I agreed that a test would be to see how
many smaller craters there are. If the pits are primarily a
monomodal group of endogenic features, then one would expect far
fewer small impact craters than if there were a power-law-like size
distribution characteristic of impact craters.
With the proviso that the "Wedges" district could be atypical of
the regions studied in G1, the answer seems clear: even small impact
craters are remarkably rare. On the Wedges picture received today,
there are only 2 obvious craters 5 pixels across or larger. I have
plotted a frequency for this "crater count" on the diagram I displayed
at the Oceans conference. It has been placed on Rushmore for you
to look at, in two forms:
For a Postscript version: /home/ssi/review/eurcra.ps
For a GIF version: /home/ssi/review/eurcra.gif
The following caption applies:
Fig. 1. Differential frequencies for pits in near-terminator regions of
Europa from G1 images plus a count from the "Wedges" frame from
C3. Open and closed green symbols indicate two different G1
regions, illustrating typical variations in spatial densities of pits.
(Purple triangles are counts of possibly saturated pits from a small
region; it is speculative if these near-resolution-limit features are
mostly real.) Typical counts from Ganymede (line = Uruk Sulcus,
squares = Galileo Regio) are for comparison. Note very steep size
distribution for larger pits indicating a cut-off in pits larger than 25
km diameter. The roll-off at small sizes may be real, in which case
pits are clustered about a modal size of 8 km, indicative of endogenic
origin; if the roll-off were an artifact of resolution, then the absence
of large pits would be compatible with the hypothesis that they are
mainly an impact population, with loss of larger ones by viscous
relaxation.
However, as shown by the blue diamond, smaller craters seen on
the high-resolution Wedges frame are extremely rare, with a
frequency perhaps two orders of magnitude less than on Uruk Sulcus.
Assuming that the Uruk Sulcus craters are primary impact craters
(and not secondaries) formed after any early bombardment period,
this would imply that the Wedges terrain on Europa is AT LEAST
two orders of magnitude younger than Uruk Sulcus (even younger
given the higher cratering rate expected on Europa due to gravita-
tional focussing by Jupiter).
Clark R. Chapman and the SwRI Crew (Bill Merline, Beau Bierhaus,
John Keller, Shawn Brooks, Peter Tamblyn)
From: MX%"mcewen@pirl.lpl.arizona.edu" 16-DEC-1996 10:51:12.73
To: MX%"ssi_science@noao.edu"
Subj: new Europa filtered image
On Rushmore, /home/ssi/review
wedge.vic Vicar format
or
wedgef.cub ISIS format
latest Europa wedge image with filters
to remove noise and pixelation and enhance edges.
Alfred
From: MX%"brt@GAS.UUG.Arizona.EDU" 14-DEC-1996 02:40:07.55
To: MX%"ssi_science@noao.edu"
Subj: Wedge reconstruction images
Europans,
I have placed eight images of my Wedges reconstruction in rushmore at:
/home/ssi/review/Step.*
or
/home/ryt/Step*.tif
They are tiff files. If you have trouble getting these, let me know.
(If you have comments about any of this please let me know, including
figures, etc.)
What you have in front of you (I assume) are eight images in two sets of
four which track the reconstruction of part of the terrain seen in the C3
Wedges image.
The first set of four is annotated ("*copy"). Bands that were
reconstructed are labeled B, C, and D. Also shown are key features whose
progressive re-assembling marks the stages of the reconstruction as we go
back in time. These features are "The Oblong" O, with parts 1-3, and
"Lineament" L, both traced with a dark line.
The second set of images matches the first but is not labeled. For
simplicity, I refer to the images as 1, 2c, 2f, and 3b.
Image 1) This is the original image showing the scene today. From
superposition, it is clear that the dark NW-trending wedges B and C plus
the dark band A are the youngest of the major bands. D is older. The
reconstruction "closes" B, C and D in that order. (The order B-C was
arbitrary.) The Oblong "O" is broken into three pieces and lineament L
is in at least five segments today.
Image 2c) Band B is closed, plus some related smaller adjustments made to
realign local linear features. Parts 1 and 2 of the Oblong come together
as do two southern segments of lineament L. Note that I closed Band B
fully. A gore begins to develop on the left side (west) of the image
because I moved terrain eastward to accomplish the closure of B. This
makes sense when you look at the Voyager images and see that the blocks
bounded by the wedge-shaped bands in this region have apparently moved
southwest while separating and translating.
Image 2f) Band C closes, removing the second major young wedge-shaped
band. As a result, additional parts of the Lineament L rejoin. It is
only broken now by the branches of B and D. Because younger features are
disrupted the scene gets confusing. (Do not adjust your set.) It is
complicated also by the cut-lines required for the reconstruction. The
features to look for are the piercing points that mark deformation - e.g.
the Oblong and the Lineament. The closure of C required care because the
band splits in the east and the total accommodation on the "tributaries"
must equal that of the main trunk. The gore from image 2c is now wider
along all its length.
Image 3b) Closing band D completes the assembly of Lineament L. Part 3
of the Oblong rejoins parts1 and 2. A small gore remains in the D
alignment, and on the far east side. The west side gore has enlarged.
Again, the full width of band D was utilized, i.e. it was closed all the
way.
There is no way, geometrically, to reassemble the Oblong and the
Lineament without closing the bands all the way. If you close the bands
by a lesser amount, these two features do not re-form coherently. This
can only happen if the bands are bounded by vertical tension fractures
and represent gaps which fill-in somehow. They cannot be areas of crust
that is thinned along listric normal faults or tilt blocks; the bands
could not be fully closed in that case. (See Golombek and Banerdt, 1990;
Pappalardo and Sullivan, 1996; Schenk and McKinnon, 1989.) I agree with
the Brown memo that the internal ridges may be associated with volcanism
of some type, e.g. sheeted dikes.
By superposition, the Oblong is relatively old terrain. Notice that it
seems to be lower than the bordering lineated terrain on the NW and SE.
Notice also that it contains the distinctive crater. Is the presence of
the crater a coincidence or a consequence of the terrain's longevity?
In the Voyager 2 images, it is hard to tell what the light-toned bands
like Band D are. Here we see that D is an extensional feature, perhaps
analogous to B and C, only older. They all may be structurally like
Thynia Linea (Pappalardo and Sullivan, 1996).
B, C, and D are extensional, but record stress directions that are
different. B and C formed with minimum stress oriented NE; D formed with
it oriented NNW (assuming no polar wander).
I have not yet reconstructed Band A nor the light band branching off D
and between D and A. Band A seems more complex than the relatively
simple B and C and has eluded me so far.
In fact, it may be a strike-slip feature (Schenk and Mckinnon, 1989).
REFERENCES:
Golombek, M.P., and Banerdt, W.B., 1990, Constraints on the subsurface
structure of Europa: Icarus, v. 83, p. 441-452.
Pappalardo, R.T., and Sullivan, R.J., 1996, Evidence for separation
across a gray band on Europa: Icarus, v 123, p 557-567.
Schenk, P.M., and McKinnon, W.B., 1989, Fault offsets and lateral crustal
movement on Europa: evidence for a mobile ice shell: Icarus, v. 79, no.
1, p. 75-100.
Randy Tufts
#######################################################
>From ssi_science-request@noao.edu Thu Dec 26 16:05:40 1996
Date: Thu, 26 Dec 1996 16:05:05 -0700
From: mcewen@pirl.lpl.arizona.edu (Alfred McEwen)
To: ssi_science@noao.edu
Subject: Re: europa
X-Sun-Charset: US-ASCII
Content-Length: 1006
2001
The 35 m/pixel Europa partial frame (s0374685100) is mosaicked
within part of the 630 m/pixel context frame (s0374667300)
on Rushmore:
/home/ssi/review/eur_35_context.vic
A groove lane with 3 strands seen at 630 m/pixel consists of
many finer grooves at 35 m/pixel.
----------------------------------------------------------------------
to Mike Carr: the area about which I asked "are there flows and channels
on Europa?" is the lower left portion of s0374667300, 630 m/pixel. There
is a bewildering array of morphologies, poorly resolved, but including
lobes overlying ridges--for example at sample 305, line 475. The
putative channels are where the ridges appear to have been "washed out",
such as sample 373, line 430. This is only a medium-res context frame,
so we should see similar features (elsewhere on Europa) at much higher
resolution.
####################################################################
>From ssi_science-request@noao.edu Mon Dec 30 16:35:42 1996
Date: Mon, 30 Dec 1996 16:35:18 -0700
From: mcewen@pirl.lpl.arizona.edu (Alfred McEwen)
To: ssi_science@noao.edu
Subject: Europa E4 mosaic
X-Sun-Charset: US-ASCII
Content-Length: 219
The 35 m/pixel Europa frames (s0374685100, s0374685139) are
mosaicked within part of the 630 m/pixel context frame (s0374667300)
on Rushmore:
/home/ssi/review/eur_35_context.vic
Image dimensions are 2001 x 2001.
#####################################################################
From: MX%"jry@potato.JPL.NASA.GOV" 10-JAN-1997 11:14:35.04
To: MX%"all_hiips@noao.edu"
CC:
Subj: E4 images
The E4 images which are being considered for release to the press are on
rushmore in /home/ssi/review and are called
e4asu_eur_34m_cut.bw e4jpl_eur_darkmaterial_mos_cut.bw
e4asu_eur_630m.bw e4jpl_eur_macu_374667300_div.bw
e4asu_eur_630m_cut.bw e4jpl_eur_macu_374667300_hpf.bw
e4jpl_eur_macu_cut_374667300.bw
e4jpl_eur_darkmaterial.bw e4jpl_eur_macu_cut_374685139.bw
e4jpl_eur_darkmaterial_mos.bw e4jpl_eur_macu_mos.bw
--jan yoshimizu
#####################################################################
>From ssi_science-request@noao.edu Mon Feb 10 13:21:56 1997
Date: Mon, 10 Feb 97 13:19:02 MST
From: phillips@LPL.Arizona.EDU (Cynthia Phillips)
To: ssi_science@noao.edu
Subject: E4 Europa Pwyll mosaic
Cc: mcewen@LPL.Arizona.EDU
Content-Length: 424
I've placed a preliminary mosaic of the 5 global Europa images, including
the crater Pwyll, on rushmore. The files are:
e4lpl_pwyll.cub (isis format)
e4lpl_pwyll.vic (vicar format)
This is a preliminary mosaic, with a photometric correction to enhance
surface features. An improved version with pass 2 data, noise removal,
and improved pointing will be forthcoming.
Thanks,
Cynthia Phillips
phillips@lpl.arizona.edu
################################################################
>From all_hiips-request@noao.edu Wed Feb 12 10:24:36 1997
Date: Wed, 12 Feb 1997 10:09:15 -0700
From: mcewen@pirl.lpl.arizona.edu (Alfred McEwen)
To: all_hiips@noao.edu
Subject: Europa high-res mosaic
X-Sun-Charset: US-ASCII
Content-Length: 826
A preliminary mosaic of the highest resolution E4 Europa
frames (as reconstructed to date) is available
in Vicar format on Rushmore:
/home/ssi/review/E4_hires.mos
8-bit (byte) 1861 lines x 2035 samples
Also available in ISIS format on pirl.lpl.arizona.edu:
E4hiresmos.cub
Orthographic projection, 25 m/pixel scale
frames 3746854*
An improved version will be produced after playback and image
reconstruction at MIPS has been completed.
In upper left corner is a portion of the 600 m/pixel context
frame (374667300) in the same projection but at 250 m/pixel
scale.
Its starting to look like the "flows" seen at 600 m/pixel might
consist of laccolithic intrusions of ice or water forming fractured
domes (or giant pingos), sometimes associated with water
breakouts and collapse into chaotic terrain.
Alfred
#########################################################
>From all_hiips-request@noao.edu Wed Feb 12 14:54:27 1997
Date: Wed, 12 Feb 1997 14:29:44 -0700
From: mcewen@pirl.lpl.arizona.edu (Alfred McEwen)
To: all_hiips@noao.edu
Subject: Europa high-res mosaic, version 2
X-Sun-Charset: US-ASCII
Content-Length: 632
Version #2 with new data:
A preliminary mosaic of the highest resolution E4 Europa
frames (as reconstructed to date) is available
in Vicar format on Rushmore:
/home/ssi/review/E4_hires.mos
8-bit (byte) 2142 lines x 2074 samples
Also available in ISIS format on pirl.lpl.arizona.edu:
/galileo3/review/E4hiresmos.cub
Orthographic projection, 25 m/pixel scale
frames 374685*
An improved version will be produced after playback and image
reconstruction at MIPS has been completed.
In upper left corner is a portion of the 600 m/pixel context
frame (374667300) in the same projection but at 250 m/pixel
scale.
Alfred
From: MX%"mcewen@pirl.lpl.arizona.edu" 13-FEB-1997 17:58:02.88
To: MX%"all_hiips@noao.edu"
Subj: Europa high-res mosaic, version 3
Version #3 with new data:
A preliminary mosaic of the highest resolution E4 Europa
frames (as reconstructed to date) is available
in Vicar format on Rushmore:
/home/ssi/review/E4_hires.mos
8-bit (byte) 2035 lines x 1965 samples
Also available in ISIS format on pirl.lpl.arizona.edu:
/galileo3/review/E4hiresmos.cub
Orthographic projection, 25 m/pixel scale
frames 374685*
An improved version will be produced after playback and image
reconstruction at MIPS has been completed.
Alfred
From: MX%"phillips@LPL.Arizona.EDU" 14-FEB-1997 12:09:16.16
To: MX%"ssi_science@noao.edu"
Subj: Merged Europa (E4-G2) Pwyll mosaic
I've placed a merged E4 - G2 mosaic on rushmore.jpl.nasa.gov in
/home/ssi/review called e4g2lpl_pwyll.vic (vicar format). The
file is also available on pirl.lpl.arizona.edu in /galileo3/review,
as e4g2lpl_pwyll.cub (isis format).
This image is a mosaic consisting of the G2 global violet image s0360063913_2,
merged with 6 E4 frames: the five clear-filter 1.2 km/pix images
s0374649000 through 9052, and the higher-resolution context frame
s0374667300.
The image has updated pointing based on a limb fit to the G2 image -- this
pointing information should be more accurate than previous images
which were tied to the Voyager basemap. The overall resolution of the
image is 1.2 km/pixel.
The images have also been photometrically corrected.
Thanks,
Cynthia Phillips
phillips@lpl.arizona.edu
From: MX%"mcewen@pirl.lpl.arizona.edu" 14-FEB-1997 12:12:55.46
To: MX%"all_hiips@noao.edu"
Subj: Europa high-res mosaic, version 4
Version #4 including 374685126.5 (which I missed--thanks to
Jeff Moore for pointing out that omission).
A preliminary mosaic of the highest resolution E4 Europa
frames (as reconstructed to date) is available
in Vicar format on Rushmore:
/home/ssi/review/E4_hires.mos
8-bit (byte) 2090 lines x 2541 samples
Also available in ISIS format on pirl.lpl.arizona.edu:
/galileo3/review/E4hiresmos.cub
Orthographic projection, 25 m/pixel scale
frames 374685*
An improved version will be produced after playback and image
reconstruction at MIPS has been completed.
Alfred
From: MX%"geissler@amalthea.lpl.arizona.edu" 14-FEB-1997 17:10:29.18
To: MX%"ssi_science@noao.edu"
Subj: Colorized Pwyll mosaic
I have merged Cynthia Phillips' E4ESGLOMAP mosaic with the G2 color data and
placed the result on rushmore in /home/ssi/review.
e4lpl_pwyll_color.vic is in VICAR format with R,G,B = bands 1,2,3
e4lpl_pwyll_color.jpg is a losslessly compressed jpeg version, also
available on http://pirl.lpl.arizona.edu/hiips/Europa_Color/Images.html
Cheers, Paul "Ted Turner" Geissler
geissler@pirl.lpl.arizona.edu
From: MX%"brt@GAS.UUG.Arizona.EDU" 14-FEB-1997 17:53:11.18
To: MX%"ssi_science@noao.edu"
Subj: E4 lineament reconstruction
Europaphiles,
Two images of a reconstruction of the broad lineament diagonally crossing
the northern portion of the E4 high resolution mosaic are available in tiff
format on rushmore:
home/ssi/review/E4hiresmos.cp.1.rec.2.tif
and
home/ssi/review/E4hiresmos.cp.1.tif
The first image is after the reconstruction, i.e. the older landscape.
The reconstruction joins the two opposing sides of the lineament along the
prominent midline groove. Digital cuts were made along two other prominent
grooves positioned symmetrically to each side of that midline or along
reasonable extensions of those alignments.
Matchups of older linear features are improved markedly by this
reconstruction.
The reconstruction removes most of the lineament although some
outboard portions are left intact. This may suggest that this version of
the reconstruction is not completely accurate, or that the remaining highland
is a structural feature not formed by the same processes that created
the removed part. Regardless, based on the geometry of the reconstruction,
it is likely that the removed portion of the lineament - the major part - is
extensional in origin.
Randy Tufts
From: MX%"phillips@LPL.Arizona.EDU" 25-FEB-1997 11:55:25.35
To: MX%"ssi_science@noao.edu"
Subj: Updated E4 Europa mosaics
I've placed two updated E4 Europa trailing hemisphere mosaics on
rushmore, in /home/ssi/review. The first is a mosaic of the five
E4 global context frames, including the crater Pwyll and the new
Pass 2 data. The files are:
e4lpl_pwyll2.cub (ISIS format)
e4lpl_pwyll2.vic (VICAR format)
The second mosaic includes the five images in the pwyll2 mosaic,
merged with a G2 violet frame and two G1 clear-filter images, as
well as the E4 hi-res context frame s0374667300. The bulge on the right
side of the image is due to the fact that the underlying full-disk G2 image
has been reprojected to the sub-s/c point of the E4 images, so valid
G1 data appears to protrude off the edge of the apparent limb, but
actually goes to the edge of the real limb. The files for this mosaic
are:
e4g2g1lpl_pwyll.cub (ISIS format)
e4g2g1lpl_pwyll.vic (VICAR format)
These images have had their pointing adjusted through a limb fit to
the full-disk G2 image, have been photometrically corrected, and
have had noise due to radiation hits removed.
Please contact me with any questions or comments about these images.
Thanks,
Cynthia Phillips
phillips@lpl.arizona.edu
From: MX%"geissler@amalthea.lpl.arizona.edu" 25-FEB-1997 14:03:47.46
To: MX%"ssi_science@noao.edu"
Subj: updated colorized E4 mosaic
I've placed an updated version of Cynthia Phillips' E4 global mosaic
merged with G2 color data on rushmore in /home/ssi/review.
e4lpl_pwyll_color_final.vic is in VICAR format with R,G,B = bands 1,2,3
e4lpl_pwyll_color_final.jpg is a losslessly compressed jpeg version, also
available on http://pirl.lpl.arizona.edu/hiips/Europa_Color/Images.html
R,G,B = 968, GRN, VIO
Paul Geissler
geissler@pirl.lpl.arizona.edu
--------------------------------------------------------------------------------
From: MX%"KLEMASZEWSKI@atlas.la.asu.edu" 5-MAR-1997 12:40:35.80
To: MX%"ssi_science@noao.edu"
Subj: new e6 europa mosaics
An updated version of e6_drklin.vic is available on rushmore in
/home/ssi/review that includes the sixth frame and the updated fifth frame.
A mosaic of the two e6 crater frames is called....e6_crater.vic
enjoy,
Klem
>From ssi_science-request@noao.edu Thu Mar 6 17:46:32 1997
Date: Thu, 6 Mar 1997 17:44:01 -0700 (MST)
From: KLEMASZEWSKI@atlas.la.asu.edu
To: ssi_science@noao.edu
Cc: greeley@asu.edu, sullivan@asu.edu, klem@asu.edu
Subject: e6 bright plains mosaic
Content-Length: 277
A mosaic of the E6BRTPLN frames is available on /home/ssi/review. It
is called e6_brtpln.vic The disruption/rafting is incredible!
I also updated e6_drklin.vic with the latest udrs, and put more of a
stretch on e6_crater.vic to bring out the ejecta around the crater.
Klem
--------------------------------------------------------------------------------
>From ssi_science-request@noao.edu Wed Mar 12 12:46:38 1997
Date: Wed, 12 Mar 1997 12:42:07 -0700 (MST)
From: KLEMASZEWSKI@atlas.la.asu.edu
To: ssi_science@noao.edu
Subject: e6plains02 mosaic
Content-Length: 344
A preliminary mosaic of the e6 plains02 observation is available on
rushmore (/home/ssi/review): e6_plains02_v1.vic
As no tiepoints exist to tie the images together top-to-bottom, I
eyeballed their relative locations--as you will see.
I will use version numbers (_v2.vic) to update this and other mosaics
to help keep things straight.
Klem
---------------------------------------------------------------------------
>From ssi_science-request@noao.edu Mon Mar 10 11:19:48 1997
Date: Mon, 10 Mar 1997 11:16:00 -0700 (MST)
From: KLEMASZEWSKI@atlas.la.asu.edu
To: ssi_science@noao.edu
Cc: greeley@asu.edu, sullivan@asu.edu, klem@asu.edu
Subject: E6 mosaics available
Content-Length: 304
The following mosaics are available on ASU's gll_hiips site:
e6_crater02.vic
e6_craters.vic --this mosaic shows the placement of the crater02 observation
within the crater01 mosaic.
e6_drklin.vic (updated)
e6_brtpln.vic (updated)
I will put these on Rushmore when space becomes available.
Klem
###################################################################
>From ssi_science-request@noao.edu Wed Mar 12 19:41:35 1997
Date: Wed, 12 Mar 1997 19:37:27 -0700 (MST)
From: KLEMASZEWSKI@atlas.la.asu.edu
To: ssi_science@noao.edu
Subject: E6 Europa mosaic updates
Content-Length: 176
The following mosaics have been updated and are on rushmore:
e6_brtpln_v3.vic --three out of the four frames are complete
e6_crater02_v3.vic --all frames are complete
Klem
###################################################################
From: MX%"KLEMASZEWSKI@atlas.la.asu.edu" 26-MAR-1997 11:40:55.34
To: MX%"ssi_science@noao.edu"
Subj: new e6 drklin mosaic
The latest version is on Rushmore in home/ssi/review: e6_drklin_v4.vic
Klem
--------------------------------------------------------------------------------
From: MX%"KLEMASZEWSKI@atlas.la.asu.edu" 26-MAR-1997 11:46:38.36
CC: MX%"ssi_science@noao.edu"
Subj: Re: Europa wedges regional mosaic
Randy,
the C3 wedges image set into a reprojected Voyager frame is on Rushmore.
The file name is: e3wedges_vgr.vic
Jim
--------------------------------------------------------------------------------
>From geissler@pirl.lpl.arizona.edu Wed Mar 26 17:14:54 1997
To: eliz@noao.edu
Subject: G2 global color
Hi Elizabeth,
The Europa G2 global color image is on /home/ssi/review as
g2lpl_global_color.vic Band order is (R,G,B) = (1,2,3).
Cheers, Paul
--------------------------------------------------------------------------------
From: MX%"phillips@pirl.lpl.arizona.edu" 3-APR-1997 10:30:14.21
To: MX%"ssi_science@noao.edu"
Subj: Europa E6 drklin mosaic
Europa E6 DRKLIN mosaic
Vicar and isis format available on: rushmore.jpl.nasa.gov
/home/ssi/review/e6lpl_drklin.cub (ISIS format)
/home/ssi/review/e6lpl_drklin.vic (VICAR format)
Also available on: pirl.lpl.arizona.edu (contact joep@pirl.lpl.arizona.edu
if you need an account)
/galileo3/review/e6lpl_drklin.cub (ISIS format)
/galileo3/review/e6lpl_drklin.vic (VICAR format)
On both rushmore and pirl, this readme is also available
e6lpl_drklin.readme
Description: Mosaic of SSI E6 clear-filter images of Europa
Projection: Orthographic
kilometers/pixel scale: 180 m/pix
latitude range: 5, 19
longitude range: -95, -80
center latitude of projection: -2
center longitude of projection: -125
bit type: 8 (byte)
number of lines: 2112
number of samples: 2119
size: 4.5 megabytes (uncompressed)
frame numbers: s0383713700,s0383713713,s0383713726,s0383713739,
s0383713752,s0383713765
Description: Latest version of the 6-frame E6 dark lineament mosaic.
This mosaic includes all the cutout windows played back in pass 2, and
is complete - no gaps! The pointing has been tied to my G2 limb fit
solution, and the images have been orthographically reprojected to the
sub-spacecraft latitude and longitude, and photometrically corrected
(lunar-lambert function, L=0.8).
Images processed and mosaiced by Cynthia Phillips, phillips@lpl.arizona.edu
--------------------------------------------------------------------------------
From: MX%"geissler@amalthea.lpl.arizona.edu" 30-APR-1997 06:10:03.29
To: MX%"ssi_science@noao.edu"
Subj: Tyre Macula composites
Hello,
A preliminary version of the Europa G7 Tyre Macula color composite is
available in /home/peg/G7 on rushmore as Tyre.vic, and on PIRL in
/galileo3/review/tyre.cub (band order for both is B,G,R = 1,2,3).
The images may also be seen at url:
http://pirl.lpl.arizona.edu/hiips/Europa_Color/Images.html
Cheers, Paul
--------------------------------------------------------------------------------
>From phillips@LPL.Arizona.EDU Wed May 14 15:02:17 1997
To: belton@noao.edu, carr@astmnl.wr.usgs.gov, greeley@atlas.la.asu.edu,
mcewen@LPL.Arizona.EDU
Subject: Potential Europa cover image
I've placed a tiff of the merged E6 drklin color image I showed at the
Tucson team meeting on rushmore. It's in /home/ssi/review,
called e6lpl_colordrklin.tiff.
I'm still working on adjusting the colors etc. on this image, but I think
this is a good working version. It can be cropped or enhanced as desired.
Let me know if there are any questions, problems, etc with this image.
I think it would make a great cover.
Thanks,
Cynthia
phillips@lpl.arizona.edu
--------------------------------------------------------------------------------
From: MX%"geissler@amalthea.lpl.arizona.edu" 2-JUL-1997 17:45:28.11
To: MX%"ssi_science@noao.edu"
Subj: Europa eclipse image
A comparison of the G7 Europa eclipse image with combined Galileo and
Voyager albedo is available on rushmore in directory /home/ssi/review/
in VICAR format as "airglow.vic" and jpeg'ed as "airglow.jpg".
These files can also be retrieved from url:
http://pirl.lpl.arizona.edu/hiips/Europa_Color/eclipse/
(this is a"secure" location, so let me know if you have any trouble
accessing it).
Cheers, Paul Geissler
geissler@pirl.lpl.arizona.edu
--------------------------------------------------------------------------------
>From jry@potato.JPL.NASA.GOV Tue Jul 8 13:31:30 1997
To: eliz@noao.edu
Subject: Eclipse images
I've put the images on rushmore in /home/jry/ema. I have a file called
readme.txt which has info about the images. All the images except 2 are north
down. There is one Europa eclipse with the others. There are also
G1ISGLOMON03 images with the eclipse images. Let me know if you have any
questions.
--jan
7/8/97
North is down
EUROPA
G7ESECLIPS01 S0389522146.UM0 (clr) CONV=0.00001 (100,275) -> (0,255)
CONV=r
where r specifies the output DN scale in number of nanowatts per cm**2 per
steradian per nanometer wavelength per DN.
S2 K
r = e * -------- * ---
A2(t-to) Ko
where
A2 = number of nanowatts per cm**2 per steradian per nanometer
wavelength per DN.
e = z(d - dc)
where z is retrieved from the Radiometric File and dc is retrieved
from the Dark-Current File.
S2 is the filter-dependent conversion factor from ft-Lamberts
to units of nanowatts/cm**2/steradian/nanometer.
t = commanded exposure time of the input image (msec).
to = line-dependent shutter offset.
K = system gain constant for the gain-state of the image.
Ko = system gain constant for the calibration file gain-state.
--------------------------------------------------------------------------------
Date: Wed, 30 Jul 1997 14:33:33 -0700 (MST)
From: Elizabeth Alvarez del Castillo
Message-Id: <199707302133.OAA29353@ursa.tuc.noao.edu>
To: mfishburn@noao.edu
Subject: Europa products
Status: R
I've put a file, e6.syncolor_blue2.tiff.gz, on Ursa in /u2/eliz/ADMIN/junk
It's the file which was submitted as a cover to Nature for the upcoming
issue with Galileo papers. It was processed by Cynthia Phillips.
Let's add this to our Europa products on Flora, okay?
It's similar to one we have there already, but I know that this one
is the final version. The other was an interim version I believe.
-Eliz.
--------------------------------------------------------------------------------
Date: Fri, 8 Aug 1997 13:27:36 -0700 (MST)
From: Elizabeth Alvarez del Castillo
Message-Id: <199708082027.NAA00839@ursa.tuc.noao.edu>
To: mfishburn@noao.edu
Subject: Please add to Flora SSI account
Status: RO
I put the file 01797icerafts.tif on Flora in odin:[ssi.europa.products]
It's the new version of
Europa E6 Ice Rafts in b/w
P48526 PIA00591 1997-04-01 Europa Ice Rafts
The new version has the missing lines fixed and the processing mistake
(double M-type feature) in the lower left corner fixed.
When you get a chance would you follow up on the archiving of it
into our system ... confirm that the privileges are correct and add
this email and the file name to the readme file, etc..
Thanks,
-Eliz.
--------------------------------------------------------------------------------
>From ssi_science-request@noao.edu Fri Aug 1 06:42:34 1997
Date: Fri, 1 Aug 1997 15:42:08 +0200 (CET-DST)
From: Tilmann Denk
To: ssi_science@noao.edu
Cc: DENK@kappa.pe.ba.dlr.de
Subject: New files on Rushmore
Status: RO
Content-Length: 3877
X-Lines: 85
Hello,
the following files have been added Rushmore's /home/ssi/review directory:
(b/w)
C9DLR_Amalthea.vic
C9DLR_GALSATS_100X75KM.vic
(color)
C3DLR_Callisto_Color_2.vic
C9DLR_CallistoScales.vic
C9Paul_G2Tilmann_Europa.vic
G7DLR_EuropaFeatures_1.vic
G7DLR_EuropaFeatures_2.vic
G7DLR_EuropaFeatures_3.vic
Short descriptions are given below. Enjoy it.
Liz: These images might be used for cat A or B press releases.
Viele Gruesse from Berlin,
Tilmann
------------------
B/w images:
The C9DLR_Amalthea.vic file shows the regular Amalthea circle update, now
including C9 data.
C9DLR_GALSATS_100X75KM.vic shows a comparison of Galilean satellite's
landscapes at a scale of about 180 meters per pixel. Each part is about
100x75 km wide. The Io image (top left) is from Voyager 1 (FDS 16392.27,
but enlarged because the original resolution is only about 400 m/pxl). The
Europa image (top right) is from the E6 dark linea 01 mosaic (out of RIM
s0383713765.2), the Ganymede data (lower left) are from the G7 Nicholson
Regio mosaic (RIM s0389923026.2), and the Callisto part (lower right) is
from C9 crater statistics mosaic (RIMs s0401505500.1 and 526.1). The very
different landscapes of the four GalSats are shown: Io with its
volcanically shaped and partly rather featureless surface, Europa with the
ridges down to the limit of resolution and very few impact craters,
Ganymede with a lot of craters and its tectonically deformed surface, which
appears to show a different style, compared to Europa; and finally Callisto
with its smooth and (in my opinion) extremely beautiful surface, formed by
impact craters, a strange powder, and nothing else(??).
Color images:
The C3DLR_Callisto_Color_2.vic frame is an improvement over the previous
version C3DLR_Callisto_Color_1. It shows Callisto C3 color data "slightly"
enhanced (left), "heavily" enhanced (center), and a false color image,
containing the violet frame, a violet-to-Nir ratio, and "889 absorption"
file for the different channels blue, green, and red.
The C9DLR_CallistoScales.vic shows a comparison of different scales on
Callisto. The scale bar in each of the four parts is 10x different (smaller
or larger) than for the previous or following image. The scales are
10 km/pxl, 1 km/pxl, 100 m/pxl, and 10 m/pxl. The top image is part of a
global Voyager 2 color frame at 10 km/pxl, below this is a part of C3
Asgard at 1 km/pxl (b/w), below this a part of C9 crater data at 100 m/pxl,
and at the bottom a part of the C3 Catena frame (enlarged to 10 m/pxl).
The C9Paul_G2Tilmann_Europa.vic image shows a comparison of the two global
Europa images from Galileo, the G2 and the C9 frames. The G2 image is my
product, while for the C9 frame, the version from Paul Geissler has been
used. The colors of both have been adjusted so that the bluish hues at the
poles look somewhat similar; but it has to be kept in mind that the used
filters for both frames are different (due to data lacks). The "Macula"
called Callanish is visible in both images as a brownish spot. Despite the
different filters, it is obvious that the mottled terrain on the leading
side has a different color compared to the mottled terrain on the trailing
side. The "huge, greyish wedge" to the right of the center of the C9 image
looks unusual. Ron, Rob: This might be a worth target for a closer look on
E25A?!
The G7DLR_EuropaFeatures_*.vic files contain a sampling of 15 different
features and landscapes on Europa, including ridges, triple bands, craters,
and many others. In version "1", the features and a description are shown
in the DLR design. Version "2" is the same without DLR logo. Version "3"
shows the "bones"; Liz: You might cut this into 15 pieces a 380x380 pixels
and fill the Galileo Web page for about half a month with it (if you want
to do so).
------------------------------------------------------------------------
Date: Fri, 31 Oct 1997 11:29:55 -0700
From: phillips@pirl.lpl.arizona.edu (Cynthia Phillips)
Message-Id: <199710311829.LAA04163@deimos.PIRL>
To: ssi_science@noao.edu
Subject: E6 Europa bright plains mosaic
Status: R
I've finally finished up a mosaic of the E6brtpln2 images from orbit
E6. The readme is attached: files are available on Rushmore and on
PIRL as indicated.
The pointing / coordinate system used for these images is my released
global basemap version. Look for a new basemap, and redone mosaics,
soon which use an updated RAND pointing / coordinate system.
Let me know if you have any questions or problems with these files.
There's a version with just the high-resolution images, and another
version with them mosaiced into a lower-resolution context frame from
the DRKLIN sequence.
Enjoy!
--Cynthia
phillips@lpl.arizona.edu
E6 Europa Bright Plains 2 Mosaic and context mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E6_Europa_brtpln2.vic
/home/ssi/review/E6_Europa_brtpln2_cxt.vic
(mosaicked into context frame)
(warning: files deleted from Rushmore after 2 weeks due to restricted
disk space.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E6_Europa_brtpln2.cub
/galileo3/mosaics/Europa/E6_Europa_brtpln2_cxt.cub
(mosaicked into context frame)
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl)
E6_Europa_brtpln2.README (this file, on both Rushmore and pirl)
E6_Europa_brtpln:
Description: SSI high-res frames mosaicked together
Projection: Orthographic
kilometers/pixel scale: 0.021
latitude range: 13.61 to 15.85
longitude range: -87.09 to -85.74 (degrees W)
center latitude of projection: -11.25
center longitude of projection: -87.76
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 2621
number of samples: 1711
size: 4.5 megabytes (uncompressed)
SSI frame numbers: s0383718600.2,s0383718600.7.s0383718600.8,
s0383718613.1,s0383718613.4,s0383718626.2,s0383718626.3,
s0383718639.2,s0383718639.3,s0383718652.2,s0383718652.3
ISIS procedures: vicar2isis, naiflab, ssical, planorth, photom l=0.8,
stretch, mosaic
Image Processing by: Cynthia Phillips, phillips@lpl.arizona.edu
E6_Europa_brtpln2_cxt:
Description: SSI high-res frames mosaicked onto Galileo
lower-resolution context frame for regional context.
Projection: Orthographic
kilometers/pixel scale: 0.021
latitude range: 13 to 17
longitude range: -88 to -84.8 (degrees W)
center latitude of projection: -11.25
center longitude of projection: -87.76
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 4674
number of samples: 4045
size: 19 megabytes (uncompressed)
SSI frame numbers: s0383718600.2,s0383718600.7.s0383718600.8,
s0383718613.1,s0383718613.4,s0383718626.2,s0383718626.3,
s0383718639.2,s0383718639.3,s0383718652.2,s0383718652.3,
s0383713700.1,s0383713701.1
ISIS procedures: vicar2isis, naiflab, ssical, planorth, photom l=0.8,
stretch, mosaic
Image Processing by: Cynthia Phillips, phillips@lpl.arizona.edu
------------------------------------------------------------------------
>From ssi_science-request@noao.edu Mon Nov 10 10:10:40 1997
Received: from noao.edu (root@noao.edu [140.252.1.54])
by orion.tuc.noao.edu (8.8.6/8.8.6/SAG-11Jul96) with ESMTP id KAA20040
for ; Mon, 10 Nov 1997 10:10:39 -0700 (MST)
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Mon, 10 Nov 1997 10:04:18 -0700 (MST)
Date: Mon, 10 Nov 1997 18:04:12 +0100 (CET)
From: Tilmann Denk
To: eliz@noao.edu
CC: ssi_science@noao.edu, DENK@kappa.pe.ba.dlr.de
Message-Id: <971110180412.2280011b@kappa.pe.ba.dlr.de>
Subject: RE: Releases
Status: RO
Hello Liz,
> I'll still need satellites releases for a few weeks....
> *** Does anyone have anything that they're preparing!?! ***.....
> Please send me any further Cat. B releases as soon as possible......
following your request, I put a file named
e4dlr_gem_targets.vic
on Rushmore's /home/ssi/review directory that might be used for release
purposes. It is a b/w compilation of eight Europan surface areas at approx.
1.5-2 km/pxl that shows SSI-target examples during GEM orbits E11-E19.
It does not contain any unreleased data: The images are either from G1,
from press-released images from G2 or E4, or from Voyager 2 data.
Short description:
Examples for SSI target areas during GEM, ordered by orbit.
Top row, from left:
- E11; Triple Bands and dark spots ("lenticulae") (from G1 data;
1.6 km/pxl).
- E12; Conamara Chaos ("raft terrain") (from E4 data; 1.6 km/pxl).
- E14; crater Mannann'an (from G1 data; 1.6 km/pxl).
- E15; Cilix (from G1 data; 1.6 km/pxl).
Bottom row, from left:
- E16; Agenor Linea and Thrace Macula (from Voyager 2 data; 2 km/pxl).
- E17; South polar terrain (from Voyager 2 data; 2 km/pxl).
- E18; Rhadamanthys Linea (from G1 data; 1.6 km/pxl).
- E19; Europa at very high phase angle (simulated image out of G2 data,
7 km/pxl).
For I25, the only other orbit with Europa geology images planned, the left
("Paul") part of image C9Paul_G2Tilmann_Europa.vic might be used to
complete the collection.
Enjoy it!
Viele Gruesse from Berlin,
Tilmann
>From KADEL@dione.la.asu.edu Mon May 18 10:01:46 1998
Subject: gem overview image montage
I just finished putting the arrows onto the image montage. It is on the
atlas.la.asu.edu server, where you should be able to ftp it over to your
place. I have two versions there, one transferred as MacBinary, and the
other as Raw data. One or the other will work, not sure which, but I
would try this file first:
e4dlr_gem_targets.tif
That's the one I fetched as Raw data from our Mac. If that doesn't come up
as a viable tiff image, then try the second image:
e4dlr_gem_targets2.tif
------------------------------------------------------------------------
>From ssi_science-request@noao.edu Tue Nov 18 21:01:28 1997
Received: from noao.edu (root@noao.edu [140.252.1.54])
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for ; Tue, 18 Nov 1997 21:01:27 -0700 (MST)
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for ; Tue, 18 Nov 1997 20:59:45 -0700 (MST)
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X-Sender: Geoffrey_Clark_Collins@postoffice.brown.edu
Message-Id:
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Date: Tue, 18 Nov 1997 22:59:25 -0400
To: ssi_science@noao.edu
From: Geoffrey Collins
Subject: E11 gray band reconstruction
Status: R
Graybandophiles,
We have done a quick Photoshop reconstruction of the gray band in the new
E11 Europa regional frames (s0420619252 and 9265). This band is the one
which appears as a distinctive sickle-shaped feature in the G1 Europa
mosaic. Our reconstruction is available on Rushmore for your viewing
pleasure in the /home/ssi/review directory as "e11_brn_grayband.vic".
The reassembled fit of preexisting structures is extremely good, suggesting
complete separation (spreading) has created the feature. It looks like the
reassembled western portion of the band has spread apart in the N-S
direction, and it has rotated by about 8.5 degrees counter-clockwise. The
band's boundaries are remarkably rounded, rather than angular or sharply
cuspate. Generally smooth, lightly striated material fills the band,
presumably formed by extrusion of low viscosity material; rough symmetry of
striations within the band suggest progressive opening. Some younger domes
and high-relief ridges cut the band.
An orthogonally trending ridge in the western image terminates within the
gray band and may be related in origin. Along much of its length, the edge
of the gray band is defined by a narrow delimiting structure, which is a
ridge in some instances and a trough in others. In the G1 Europa mosaic,
this gray band seems to cut another N-S trending gray band; this older gray
band is seen at high-res as the N-S set of lineaments that intersects the
E-W gray band along the boundary of the two Galileo images.
To the east, the boundaries of the gray band do not close in the same
direction as the reconstructed portion we have analysed. When playback is
complete, it will be possible to determining the pole(s) of opening for the
constituent portions of this band.
- Geoffrey Collins and Bob Pappalardo
------------------------------------------------------------------------
>From ssi_science-request@noao.edu Thu Nov 20 01:11:34 1997
Date: Thu, 20 Nov 1997 01:10:01 -0700 (MST)
From: Paul Geissler
To: ssi_science@noao.edu
Subject: E11 Europa color composites
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Content-Length: 350
Status: RO
X-Lines: 8
Registered and filtered versions of the E11 COLORS01 and COLORS02
images are available on rushmore as /home/ssi/review/e11lpl_colors0*.vic
and on pirl as /galileo3/review/Europa/e11lpl_colors0*.cub
False color pictures in lossless-jpeg format can be downloaded from
http://pirl.lpl.arizona.edu/hiips/Europa_Color/Images.html
Cheers, Paul Geissler
------------------------------------------------------------------------
>From ssi_science-request@noao.edu Mon Nov 24 11:00:20 1997
Date: Mon, 24 Nov 1997 18:44:55 +0100 (CET)
From: Tilmann Denk
To: ssi_science@noao.edu
Cc: DENK@kappa.pe.ba.dlr.de
Subject: E18 Europa flyby
Status: RO
Content-Length: 1557
X-Lines: 29
Dear friends of the GEM, 24-NOV-1998
last Sunday's E18 flyby of the Galileo spacecraft was its 10th close
Europa flyby since the beginning of the nominal tour in 1995. The new frame
on Rushmore's /home/ssi/review directory,
e18dlr_gll_flyby.tiff
illustrates this celebration event, that also marked Galileo's very last
targeted dayside Europa flyby and the most northern pass over the Europan
surface. The frame shows the spacecraft busily imaging intriguing
Rhadamanthys Linea which might be a "not-yet evolved" or "baby" Triple
band. Just minutes before, Galileo passed over heavily mottled terrain, an
area that is believed to be geologically younger than the heavily ridged
terrain which can be seen in light-bluish hues to the upper left.
Over the horizon, as seen from the spacecraft, Io and Jupiter are rising.
Io, the smaller of these two celestial footballs, is known as the most
active volcano body in the solar system and target for Galileo's two
suicidal flybys in fall next year. Jupiter, the largest and most massive
planet of the Solar System, holds all these circling bodies (including
Galileo) together for the purpose that flight engineers on Earth are
able to repeatedly target the spacecraft in a scientifically and
public-outreachly useful manner. It might also be the planet that will
guzzle the Galileo orbiter possibly some millenia after end-of-mission,
currently scheduled for January 2000. (Jupiter already ate Galileo
part 1 - the probe - in December 1995.)
- end -
-------------------------------------------------------------------------
>From ssi_science-request@noao.edu Wed Nov 26 12:29:05 1997
Date: Wed, 26 Nov 97 12:20:25 MST
From: phillips@LPL.Arizona.EDU (Cynthia Phillips)
To: ssi_science@noao.edu
Subject: Preliminary E11 hires Europa mosaic
Content-Length: 427
Status: RO
X-Lines: 14
I've made a preliminary mosaic of the new E11 high resolution Europa
images. The mosaic includes frames s0420626700 through 6765, and
is in an orthographic projection. Resolution is 32.7 meters / pixel.
Vicar and isis versions are available on PIRL, in
/galileo3/review/Europa/E11_Europa_hires.vic or .cub,
and on rushmore in /home/ssi/review/E11_Europa_hires.vic or .cub.
Enjoy!
--Cynthia
phillips@lpl.arizona.edu
---------------------------------------------------------------------
>From ssi_science-request@noao.edu Sat Dec 6 17:55:10 1997
Date: Sat, 6 Dec 97 17:53:26 MST
From: phillips@LPL.Arizona.EDU (Cynthia Phillips)
To: ssi_science@noao.edu
Subject: E11 Europa hires mosaic, V.2
Status: O
Content-Length: 594
X-Lines: 21
I've put a new version of my hires E11 Europa mosaic on
rushmore and on pirl.lpl.arizona.edu. This version includes
images s0420626700 through 6800, orthographic projection,
resolution 32.7 m/pixel, photometrically corrected (lunar
lambert, l=0.8).
on rushmore.jpl.nasa.gov, it's:
/home/ssi/review/E11_Europa_hires2.cub (isis version)
/home/ssi/review/E11_Europa_hires2.vic (vicar version)
on pirl.lpl.arizona.edu, it's:
/galileo3/review/Europa/E11_Europa_hires2.cub (isis version)
/galileo3/review/Europa/E11_Europa_hires2.vic (vicar version)
Enjoy!
--Cynthia
phillips@lpl.arizona.edu
------------------------------------------------------------------
>From ssi_science-request@noao.edu Sun Dec 7 08:12:38 1997
Date: Sun, 7 Dec 1997 08:10:31 -0700 (MST)
From: Randy Tufts
To: ssi_science@noao.edu
Cc: Randy Tufts
Subject: E11 Europa reconstruction
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Status: RO
Content-Length: 776
X-Lines: 24
Dear Europaphiles,
The wide, EW-trending "band" near the bottom of the revised E11 high res
mosaic by Cynthia Phillips reconstructs nicely. The reconstruction is
unambiguous because older lineaments trend at various orientations. The
actual relative motion was right-oblique. The right-lateral component is
9.7km, the dilational component is 12.8km, and the total oblique distance
is 16.1km. The reconstruction involved only a translation.
I have posted a "Not ready for real time" version on:
rushmore.jpl.nasa.gov
/home/ssi/review/
E11_Europa_hires2.tif.L1.copy
and
E11_Europa_hires2.tif.L3.copy
or at PIRL on
/galileo3/review/Europa/
Thanks to Greg Hoppa for noticing the possible reconstruction, and Rob and
Herb for getting the rest of the image.
Randy
----------------------------------------------------------------------
>From ssi_science-request@noao.edu Wed Dec 31 21:08:58 1997
Date: Wed, 31 Dec 1997 21:05:10 -0700 (MST)
From: Paul Geissler
To: Bob Pappalardo
Cc: ssi_science@noao.edu
Subject: Re: E12 SSI UDRs
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Status: RO
Content-Length: 541
X-Lines: 14
Hi Bob et al.,
Preliminary versions of the Agenor color image from E12 are on pirl
as /galileo3/review/Europa/e12_glocol.cub and in jpg format at url
http://pirl.lpl.arizona.edu/hiips/Europa_Color/E12/. I have not yet
been able to navigate them (they're not yet in the ISIS spice table)
but will do so as soon as possible. An interesting new observation is
that Agenor has a relatively low 968/GRN ratio! - I guess the Icarus
lineaments paper is due for revision already...
Happy New Year!
Paul Geissler
geissler@pirl.lpl.arizona.edu
Editor's Note: The images from the URL site are: 756-grn-vio_s.jpg
968-grn-vio_s.jpg
968_on_grn.jpg
------------------------------------------------------------------
>From ssi_science-request@noao.edu Sat Jan 10 20:35:41 1998
From: KLEM@dione.la.asu.edu
Date: Sat, 10 Jan 1998 20:32:00 -0700
To: ssi_science@noao.edu
Subject: prelim. E12 drklin color mosaic
Status: RO
Content-Length: 395
X-Lines: 13
A preliminary mosaic of the E12DKLNCL frames is available on
rushmore in /home/ssi/review. The files, e12drklin.red,
e12drklin.grn and e12drklin.blu correspond to the 756, GRN and
VIO frames, respectively.
The images have been photometrically corrected and orthographically
reprojected to 0.060 m/pixel (from ~180 m/pixel ) with north to
the top -- they are about 9.45 Mb each.
enjoy!
Klem
====================================================================
>From ssi_science-request@noao.edu Wed Jan 14 13:32:39 1998
From: Roland.Wagner@dlr.de
Date: Wed, 14 Jan 1998 21:26:56 +0100 (CET)
To: ssi_science@noao.edu
Subject: 11ESREGMAP mosaic on rushmore
Content-Length: 1744
Status: RO
X-Lines: 53
********************************************************************************
Berlin, 14-Jan-1998
Dear Colleagues,
We have put a Mercator mosaic of 11ESREGMAP01 (map scale = 0.22 km/pxl) on
rushmore. The file is located in:
/home/ssi/review
File name is dlr_e11regmap.mos (Vicar format with map labels).
For those who have an account at ASU on atlas.la.asu.edu, the file may also be
retrieved from directory rhea:[wagner.to_rushmore]. Protection is open.
The mosaic was enhanced with a highpass filter of 251x251 filter box size.
If it appears to dark on other screens, use a logarithmic stretch to make it
look brighter (e.g. min=0 max=255 curve = about 100 - 300).
With the LPSC stress being over sooner or later, I hope I also can provide this
mosaic in context with a medres VGR/GLL mosaic until Friday !
Enjoy and best regards ! -- Roland Wagner
PS: Again we'd like to remind you that our e-mails at DLR will change. The
general form will be: [First_name].[Second_name]@dlr.de, e.g.:
Tilmann.Denk@dlr.de, Roland.Wagner@dlr.de, Gerhard.Neukum@dlr.de,
Uli.Koehler@dlr.de ...
--------------------------------------------------------------------------------
MAP LABEL:
------------
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1565.0
B_AXIS_RADIUS=1565.0
C_AXIS_RADIUS=1565.0
BODY_LONG_AXIS=0.0
MAP_SCALE=0.2199999988079071
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=240.0
SPHERICAL_AZIMUTH=0.0
CARTESIAN_AZIMUTH=0.0
LINE_PROJECTION_OFFSET=1164.0
SAMPLE_PROJECTION_OFFSET=706.0
================================================================================
>From ssi_science-request@noao.edu Wed Jan 14 15:06:04 1998
Date: Wed, 14 Jan 1998 14:59:33 -0700
From: phillips@pirl.lpl.arizona.edu (Cynthia Phillips)
To: ssi_science@noao.edu
Subject: E11 regmap mosaic
Content-Length: 2660
Status: RO
X-Lines: 78
I've also completed a mosaic of the e11 regmap images. This one, in
an orthographic projection, is available on rushmore and on pirl
as described below. The mosaic is also available placed in a G1
context image. The coordinate system on these two images is that
of my g7c9full.noseam global mosaic.
The context version has been compressed with gzip due to its large
size.
Europa E11 regmap mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/e11LPL_regmap.vic
and /home/ssi/review/e11LPL_regmap_cxt.vic
(warning: files may be deleted from Rushmore after 2 weeks due to
restricted disk space.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/review/Europa/e11LPL_regmap.cub
and /galileo3/review/Europa/e11LPL_regmap_cxt.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl)
e11LPL_regmap.cub:
Description: SSI high-res frames merged and mosaiced
Projection: Orthographic
kilometers/pixel scale: 0.22
latitude range: 9.02,-21.93
longitude range: -129.40,-114.77
center latitude or projection: 3.28
center longitude of projection: -140.45
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 3766
number of samples: 1814
size: 6.9 megabytes (uncompressed)
Frame numbers: s0420619200_3,s0420619200_5,s0420619200_6,
s0420619213_3,s0420619213_5,s0420619213_6,s0420619226_3,
s0420619239_3,s0420619239_5,s0420619252_2,s0420619252_4,
s0420619265_2,s0420619265_4,s0420619278_3,s0420619278_5,
s0420619278_6,s0420619300_2,s0420619300_4,s0420619313_2,
s0420619313_3,s0420619326_2,s0420619326_3
e11LPL_regmap_cxt.cub:
Description: SSI high-res frames merged and mosaiced with G1
context frame
Projection: Orthographic
kilometers/pixel scale: 0.22
latitude range: 25,-35
longitude range: -145,-100
center latitude or projection: 3.28
center longitude of projection: -140.45
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 7112
number of samples: 5168
size: 11 megabytes (compressed with gzip)
Frame numbers: s0420619200_3,s0420619200_5,s0420619200_6,
s0420619213_3,s0420619213_5,s0420619213_6,s0420619226_3,
s0420619239_3,s0420619239_5,s0420619252_2,s0420619252_4,
s0420619265_2,s0420619265_4,s0420619278_3,s0420619278_5,
s0420619278_6,s0420619300_2,s0420619300_4,s0420619313_2,
s0420619313_3,s0420619326_2,s0420619326_3,s0349875126_3,
s0349875126_4
Enjoy, and let me know if you have any questions or problems.
--Cynthia
phillips@lpl.arizona.edu
========================================================================
>From ssi_science-request@noao.edu Tue Jan 20 16:26:16 1998
X-Sender: Geoffrey_Clark_Collins@postoffice.brown.edu
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Date: Tue, 20 Jan 1998 18:17:25 -0500
To: ssi_science@noao.edu
From: Geoffrey Collins
Subject: E12 Chaos stereo
Content-Length: 1237
Status: RO
X-Lines: 30
Hello, Europaphiles...
It turns out that Galileo was moving fast enough while shuttering the 9
m/pixel E12 Conamara Chaos mosaic that one can see stereo topography in the
overlap regions of consecutive frames. So far, we have only returned the
bottom halves of the 5 frames in this sequence, and of those, only the
first two have overlap. (The frames are linked top right corner to bottom
left corner.)
This is important from a downlink planning standpoint, because we will want
to play back all of these overlap regions to get the maximum area covered
by stereo data. This does not change the current plan, but we will
certainly want to avoid cutting these overlap areas if downlink gets
tighter.
If you want to check out a preliminary red-green version of the stereo
image (red is the left channel), download the file Chaos_stereo.tif from
the gllpeople folder on ganymede.geo.brown.edu
login = gllpeople
password = ssinims
Most of this small area is the top of an intact block with parallel ridges,
and in the northern corner, there is a small glimpse of the lowlying matrix
between the blocks. A small bright cluster of craters (probably Pwyll
ejecta) overlies both terrain types.
Enjoy!
Geoff Collins and Louise Prockter
====================================================================
>From ssi_science-request@noao.edu Thu Jan 22 14:14:13 1998
To: ssi_science@noao.edu
From: LO@dione.la.asu.edu, ASU Crew
Subject: Re: E12/E6 high res mos
Dear Team,
The wonderful mosaic of E12 high res data inset into E6 high and regional
resolution coverage of the Conamara Chaos region that Roland produced has been
put into the ASU GLL_HIIPS directory. There are two versions of the file:
E12_E6_PRELIM1.PICT in Pict format, Photoshop 3.0
E12_E6_PRELIM1.VIC in Vicar format
>From ssi_science-request@noao.edu Fri Jan 23 13:55:26 1998
To: ssi_science@noao.edu
Subject: Map label for E12 in E6 context
Berlin, 23-Jan-1998
Dear Colleagues,
Below I attach the (Vicar) map label information for the preliminary E12
Conamara Chaos mosaic in E6 context Ed Lo has put on the ASU GLL_HIIPS
directory (see also Ed Lo's e-mail to ssi_science he sent yesterday).
Best regards and enjoy ! -- Roland Wagner
================================================================================
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1561.5
B_AXIS_RADIUS=1561.5
C_AXIS_RADIUS=1561.5
MAP_SCALE=0.009999999823393647
MAP_RESOLUTION=504.6912583333335
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=270.0
LINE_PROJECTION_OFFSET=24775.20043754578
SAMPLE_PROJECTION_OFFSET=12630.60022306442
====================================================================
>From ssi_science-request@noao.edu Thu Jan 29 07:11:54 1998
To: ssi_science@noao.edu
Subject: DLR E12 stereo products
Berlin, 29-Jan-1998
Dear Colleagues,
We have put three preliminary stereo products of 12ESCHAOS01 on rushmore.
Directory is /home/tyr/E12_stereo. The files are:
(1) dlr_e12chaos_stereo1.pict
---------------------------------
The file shows a perspective view of a preliminary terrain model derived from
two overlapping frames (S0426271900 and S0426271913) of Conamara Chaos
(12ESCHAOS01). The file was saved in PICT-Format under Photoshop 3.0.
(2) dlr_e12chaos_dtm1.hlf
-----------------------------
This is a digital terrain model with a ground pixel size of 10 m. The actual
ground pixel resolution of the DTM is probably not better than 50 m (best
guess). The height accuracy is better than 30 m in most parts of the terrain
model.
The file is in standard Vicar format (halfword).
(3) dlr_e12chaos_ortho1.byt
-------------------------------
This is the ortho-image derived from the terrain model (2) and from SSI frame
S0426271900.
The file is in standard Vicar format (byte).
Best regards and enjoy !
Bernd Giese
Roland Wagner
Gerhard Neukum
====================================================================
>From ssi_science-request@noao.edu Wed Jan 28 13:23:34 1998
To: ssi_science@noao.edu
Subject: e12 stereo images
The high res sequence in the wedges region included images
that allowed stereo reconstruction over several square
kilometers. We have created stereo pairs and placed them on
rushmore in:
/home/ssi/review/
e12_wedge_left.tif
e12_wedge_right.tif
The dominant structure in this region is a 1 km wide
symetrical ridge system (Class 2 in the ridge taxonomy
of Greenberg et al.). According to our model, Class 2
ridges form during diurnal extrusion of crushed ice, while
incomplete extrusion rachets open the underlying crack
in the crust. See our Icarus and LPSC submissions for more
details on this model.
Greg Hoppa, Rick Greenberg and Randy Tufts
====================================================================
Date: Thu, 5 Feb 98 17:13:51 MST
From: eliz@noao.edu (Elizabeth Alvarez del Castillo)
Message-Id: <9802060013.AA00418@eagle.tuc.noao.edu>
To: mfishburn@noao.edu
Subject: Archive products
Cc: bexton@noao.edu, mbelton@noao.edu
Status: RO
Please save these two files in the correct product directories.
You'll find them on Eagle in /data0/eliz/ADMIN/junk
Both products were obtained from Jim Klemazewski at ASU on 2/4/98.
e3wedges.liz is the C3 Wedges image with one set of missing lines filled in
and the other set of missing lines filled in by lower
resolution VOyager data
e4callan.liz is the E4 Callanish Macula mosaic.
-Eliz.
====================================================================
>From ssi_science-request@noao.edu Thu Feb 12 09:40:50 1998
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Date: Thu, 12 Feb 1998 17:36:05 +0100 (MET)
From: Thomas Roatsch
To: Michael Belton X350
Cc: Thomas.Roatsch@dlr.de, ssi_science@noao.edu
Subject: proposal for press conference
In-Reply-To: <199802061851.LAA04496@jupiter.tuc.noao.edu>
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Mike,
we put a first example of a perspective view of the wedges01/02 area
as proposal for the press conference on rushmore.
The image is wedges_perspec_1.vic in /home/ssi/review
Gerhard Neukum and the DLR SSI Team
========================================================================
>From ssi_science-request@noao.edu Fri Feb 13 09:56:37 1998
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Date: Fri, 13 Feb 1998 17:52:15 +0100 (MET)
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: new proposals for press release
Message-Id:
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Content-Type: TEXT/PLAIN; charset="US-ASCII"
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Mike and Jim,
we created a few more perspective views for the next press conference:
pwyll20.vic Pwyll viewed from 20 degrees elevation, color coded
height
pwyll20bw.vic Pwyll viewed from 20 degrees elevation, no colors
pwyll35.vic Pwyll viewed from 35 degrees elevation, color coded
height
pwyll35bw.vic Pwyll viewed from 35 degrees elevation, no colors
pwyll45.vic Pwyll viewed from 45 degrees elevation, color coded
height
pwyll45bw.vic Pwyll viewed from 45 degrees elevation, no colors
wedges35.vic Wedges 01/02 area, viewed from 35 degrees elevation,
color coded height
wedges35bw.vic Wedges 01/02 area, viewed from 35 degrees elevation,
no colors
All images are on rushmore in /home/ssi/review
Gerhard Neukum and the DLR SSI Team
==================================================================
>From ssi_science-request@noao.edu Fri Feb 6 08:28:20 1998
To: ssi_science@noao.edu
Subject: new DLR products on rushmore
Berlin, 6-Feb-1998
Dear colleagues,
We have put several stereo products on rushmore into /home/ssi/review :
(1) E12 wedges stereo
-----------------------
- File e12wedge0102_dtm.hlf Vicar image, halfword format
The DTM was created with frames s0426272821 (wedge_02), and
s0426272639, s0426272642 and s0426272646 (wedge_01). The DTM will be
completed as soon as pass 2 playback is terminated.
Pixel resolution is 14 m/pxl.
- File e12wedge0102_ortho.byt Vicar image, byte format
This file is an ortho-photo mosaic derived from three wedge_01 images.
Resolution is also 14 m/pxl.
- File e12wedge0102_ortho.pict Pict format
Here are some preliminary observations based on the DTM:
- Covered area is about 14 km x 4 km.
- Height accuracy is better than 10 m.
- Terrain A showing a NW-SE structural trend is about 100 m lower than
the surrounding NE-SW trending ridge R1.
- The trough T cutting through terrain B in N-S direction is about 60 to
80 m deep (with respect to B) and has slopes up to 20 deg at the east-
facing wall.
- Ridge R2 is about 80-100 m higher than the surrounding terrain. Slopes
are up to 16 deg (east-facing wall). The "true" slopes may be some
degrees steeper.
- There seems to be a general smooth slope down from east to west (average
height difference is about 200-300 m).
File wedges_e12_ana.vic Vicar image, byte format, colour, BSQ
For this preliminary anaglyph image of E12 wedges portions of wedge_02
(green channel) have been manually adjusted (for resolution, geometry)
to fit onto the corresponding wedge_01 images (red channel). The
resulting images have been mosaicked.
(2) E12/E6 Pwyll stereo
-------------------------
File Pwyll_ana.vic Vicar image, byte format, colour, BSQ
Preliminary anaglyph image of Pwyll crater were s0426268700.4 image (green) has
Both images have been geometrically altered.
Enjoy !
Gerhard Neukum and the DLR SSI Team
==================================================================
>From ssi_science-request@noao.edu Fri Feb 6 15:37:24 1998
To: ssi_science@noao.edu
Subject: e12 mosaics on rushmore
Howdy all!
I've put three e12 mosaics on rushmore in /home/ssi/review:
(1) e12pwyll.vic -- orthographically reprojected with north up at 0.040
m/pixel (the larger file sizes make better photographic reproductions (less
degraded looking). This file is 8.5 megaBYTES.
(2) e12_2pwyll.vic -- a smaller version of the above mosaic showing the
location of the imageon the e2photom disc imaged on G2. Only 1.57 megabytes.
(3) e12_6chaos.vic -- the five e12 chaos pass-1 frames set into context in a
portion of the e6 bright plains 01 mosaic; orthographically reprojected to
0.015 m/pixel. The e12 hires frames are set into the e6 context, not
registered to it. 7.8 megabytes.
Due to the large sizes of these files, I will delete them from rushmore first
thing Tuesday morning.
Cheers,
Klem
==================================================================
>From ssi_science-request@noao.edu Mon Feb 9 12:04:17 1998
To: ssi_science@noao.edu
Subject: pwyll stereo
Cc: hoppa@pirl.lpl.arizona.edu
I have made a slightly different version of the Pwyll stereo images.
The images are located in:
/home/ssi/review/
pwyll_e6.cub (right image)
pwyll_e12.cub (left image)
pwyll_stereo.tif (for use with red-blue glasses with red on the left)
Both images are orthographic reprojections centered on
-1.715 latitude 273.55 longitude with a resolution of 126 m/pixel.
Enjoy,
Greg
==================================================================
>From ssi_science-request@noao.edu Fri Feb 6 19:15:30 1998
To: ssi_science@noao.edu
Subject: 2 more e12 mosaics
2 more e12 mosaics are available of rushmore /home/ssi/review:
(1) g12glgmsh.vic -- the pass 1 & 2 ganymede gilgamesh basin
orthographic reprojection -- 6.86 megabytes
(2) e12_3wedges.vic -- this is a composite of the e12wedges01,
e12wedges02, e12wedges03 (registered together) stuck to (not
registered but it looks good except for the upper right two
frames of 02) the e3wedges image. All of these have been
reprojected orthographically to 0.056 km/pixel. --8.46 meg.
I have a version without the e3wedges background at 0.028
km/pixel available upon request.
Due to their large size, these images will be deleted from
rushmore early tue morning (AZ time).
enjoy,
Klem
==================================================================
>From ssi_science-request@noao.edu Tue Feb 10 08:29:54 1998
To: ssi_science@noao.edu
Subject: red - blue anaglyphs
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
We reproduced our anaglyphs from Friday (pwyll and wedges) as red-blue
anaglyphs.
Both images can be found on rushmore in /home/ssi/review/,
the filenames are
Pwyll_redblue.vic
Wedges_redblue.vic
Mike,
we will generate all our stereo products for the press conference as
red-blue stereo products.
Gerhard Neukum and the DLR SSI Team
==================================================================
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: wedges draft video
Message-Id:
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Status: R
Mike and Jim,
we put a DRAFT video with a fligth over our wedges01/02 DTM on rushmore.
We hope to send a better version on Monday.
The video is in two different formats
(E12-wedges-draft.avi and E12-wedges-draft.mac).
Both videos are in /home/ssi/review.
It should be possible to view both videos on different platforms.
Please, let us know if you have any problems to show these videos.
Gerhard Neukum and the DLR SSI Team
==================================================================
>From ssi_science-request@noao.edu Tue Feb 17 04:00:54 1998
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Date: Tue, 17 Feb 1998 11:59:38 +0100 (CET)
Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.EDU
Message-Id: <980217115938.214001af@terra.pe.ba.dlr.de>
Subject: DLR updated mosaic E12/E6 Conamara Chaos
Content-Length: 1168
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Status: RO
********************************************************************************
Berlin, 17-Feb-1998
Dear Colleagues,
We have put an updated version of the E12 Conamara Chaos 10m/pxl in E6 context
on rushmore in /home/ssi/review. File name is dlr_e12chaos_cntxt_pass1.mos. The
file is in standard Vicar format with map label (see below).
The E12 frames were map projected (Mercator) and registered manually to the
E6 context. Part of processing (contrast and edge enhancement) was done in
Photoshop.
Enjoy ! --- Roland Wagner
------------------------------------------------------------
Map label:
------------
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1565.0
B_AXIS_RADIUS=1565.0
C_AXIS_RADIUS=1565.0
BODY_LONG_AXIS=0.0
MAP_SCALE=0.009999999776482582
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=270.0
SPHERICAL_AZIMUTH=0.0
CARTESIAN_AZIMUTH=0.0
LINE_PROJECTION_OFFSET=24775.201171875
SAMPLE_PROJECTION_OFFSET=12630.6005859375
================================================================================
>From ssi_science-request@noao.edu Tue Feb 17 09:42:44 1998
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Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.EDU
Message-Id: <980217174118.21400233@terra.pe.ba.dlr.de>
Subject: E12 wedge02 in C3 context
Content-Length: 1076
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Status: RO
********************************************************************************
Berlin, 17-Feb-1998
Dear Colleagues,
We have put a pass-1 mosaic of 12ESWEDGES02 in C3 context on rushmore in
/home/ssi/review. File name is dlr_e12wedge02_c3_cntxt.vic (Vicar format;
map information see below).
A (smaller) version of this mosaic showing the areas used for crater counts
will follow later this day or tomorrow.
Enjoy ! -- Roland Wagner
---------------------------------------------------
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1565.0
B_AXIS_RADIUS=1565.0
C_AXIS_RADIUS=1565.0
BODY_LONG_AXIS=0.0
MAP_SCALE=0.02499999930692277
MAP_RESOLUTION=63.5218931294326
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=200.0
SPHERICAL_AZIMUTH=0.0
CARTESIAN_AZIMUTH=0.0
LINE_PROJECTION_OFFSET=-15514.40068817139
SAMPLE_PROJECTION_OFFSET=-584.8000259399414
================================================================================
>From ssi_science-request@noao.edu Tue Feb 17 11:25:15 1998
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Date: Tue, 17 Feb 1998 19:23:23 +0100 (CET)
From: Uli Koehler/DLR
To: ssi_science@noao.EDU
Message-Id: <980217192323.218000e8@terra.pe.ba.dlr.de>
Subject: 2 new E12 products by DLR
Content-Length: 720
X-Lines: 22
Status: RO
E12 stereo products from DLR
============================
Team,
we put a new version of our Pwyll red-blu anaglyph image on RUSHMORE
located in ssi_review, where a map projection has been applied. It's
in VICAR format and named
e6e12_pwyll_orth_anagl_blue.vic
In addition, there is a color-coded stereo model of Pwyll as seen
under a 45 deg angle (same as we put in a b/w version on RUSHMORE last
friday); changes, of course, can be applied, in case a different
color table should be applied, or the viewing angle or the hight
exaggeration should be modified. Filename on ssi_review is
pwylln_color_new.vic
Any comments or suggestions appreciated!
Uli Koehler,
for Gerhard Neukum and the DLR Galileo Group
========================================================================
>From all_hiips-request@noao.edu Tue Feb 17 13:23:10 1998
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Date: Tue, 17 Feb 1998 13:20:54 -0700 (MST)
From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa E12 Wedges 15m/pxl mosaic
Message-ID:
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Europa Wedges 15M Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E12_Wedges_15M.vic
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E12_Wedges_15M.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E12_Wedges_15M.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames.
ProjectiOn: Orthographic
kilometers/pixel scale: .015
latitude range: -17.62 to -16.8
longitude range: -164.62 to -160.8
center latitude of projection: -7.08
center longitude of projection: -171.54
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 1051
number of samples: 5496
size: 5.8 megabytes (uncompressed)
SSI frame numbers: s0426272600.1 to s0426272660.1
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
have fun,
Moses
=====================================================================
>From all_hiips-request@noao.edu Tue Feb 17 13:23:58 1998
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Date: Tue, 17 Feb 1998 13:21:58 -0700 (MST)
From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa E12 Wedges in E12 context (15m/pxl)
Message-ID:
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Europa E12 Wedges Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E12_Wedges_15M_E12_context.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E12_Wedges_15M_E12_context.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E12_Wedges_15M_E12_context.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames mosaicked onto E12 med-res
for regional context.
Projection: Orthographic
kilometers/pixel scale: .015
latitude range: -18 to -16.5
longitude range: -166 to -160
center latitude of projection: -7.08
center longitude of projection: -171.54
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 1991
number of samples: 7601
size: 15.2 megabytes (uncompressed)
SSI frame numbers: s0426272600.1 to s0426272660.1, s0426273826.1
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
======================================================================
>From all_hiips-request@noao.edu Tue Feb 17 13:25:07 1998
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From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa E12 Wedges in E12 context in C3 context (30m/pxl)
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Europa Wedges E12_C3_30M_context Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E12_Wedges_E12_C3_30M_context.vic
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E12_Wedges_E12_C3_30M_context.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E12_Wedges_E12_C3_30M_context.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI, E12 hi-res frames on E12 med-res
on C3 med-res context.
ProjectiOn: Orthographic
kilometers/pixel scale: .03
latitude range: -18.65 to -13.94
longitude range: -165.29 to -160.9
center latitude of projection: -7.08
center longitude of projection: -171.54
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 4290
number of samples: 3958
size: 17 megabytes (uncompressed)
SSI frame numbers: s0426272600.1 to s0426272660.1,
s0426272811.1 to s0426272846.2, s0426273826.1, s0368639400.9
Image Processing done by:
Cynthia Phillips, phillips@pirl.lpl.arizona.edu,
Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
========================================================================
>From all_hiips-request@noao.edu Tue Feb 17 13:32:59 1998
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Date: Tue, 17 Feb 1998 13:25:39 -0700 (MST)
From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa E12 Wedges in E12 context in C3 context (15m/pxl)
Message-ID:
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Europa Wedges E12_C3_context Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E12_Wedges_E12_C3_context.vic
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E12_Wedges_E12_C3_context.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E12_Wedges_E12_C3_context.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI E12 hi-res frames onto med-res frames
onto C3 med-res frames for regional context.
ProjectiOn: Orthographic
kilometers/pixel scale: .015
latitude range: -18.65 to -13.94
longitude range: -165.29 to -160.9
center latitude of projection: -7.08
center longitude of projection: -171.54
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 8580
number of samples: 7917
size: 67.9 megabytes (uncompressed)
SSI frame numbers: s0426272600.1 to s0426272660.1,
s0426272811.1 to s0426272846.2, s0426273826.1, s0368639400.9
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
Cynthia Phillips, phillips@pirl.lpl.arizona.edu
NOTE:
ALL IMAGES (INCLUDING FROM PREVIOUS E-MAILS) HAVE BEEN COMPRESSED USING gzip.
have fun,
Moses
=======================================================================
>From all_hiips-request@noao.edu Tue Feb 17 18:22:35 1998
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Date: Tue, 17 Feb 1998 18:20:58 -0700 (MST)
From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa Wedges mosaics
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Europa wedge2 25M Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/e12_wedge2_25M.vic
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/e12_wedge2_25M.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
e12_wedge2_25M.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames.
ProjectiOn: Orthographic
kilometers/pixel scale: .0257
latitude range: -18.56 to -13.94
longitude range: -166.08 to -161.78
center latitude of projection: -5.95
center longitude of projection: 177.25
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 4531
number of samples: 3000
size: 13.6 megabytes (uncompressed)
SSI frame numbers: s0426272811.1 through s0426272846.2
Image Processing done by: Cynthia Phillips,
phillips@pirl.lpl.arizona.edu
=====================================================================
>From all_hiips-request@noao.edu Tue Feb 17 18:23:13 1998
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Date: Tue, 17 Feb 1998 18:21:42 -0700 (MST)
From: Moses Milazzo
To: all_hiips@noao.edu
Subject: Europa E12 Wedges mosaics
Message-ID:
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Europa e12 wedge2 Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/e12_wedge2_cxt.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/e12_wedge2_cxt.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
e12_wedge2_cxt.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames mosaicked onto E12 med-res
for regional context.
Projection: Orthographic
kilometers/pixel scale: .0257
latitude range: -18.65 to -13.94
longitude range: -165.29 to -161.63
center latitude of projection: -5.95
center longitude of projection: 177.25
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 4541
number of samples: 3241
size: 14.7 megabytes (uncompressed)
SSI frame numbers: s0426272811.1 to s0426272846.2, s0426273826.1
Image Processing done by: Cynthia Phillips,
phillips@pirl.lpl.arizona.edu
======================================================================
>From ssi_science-request@noao.edu Wed Feb 18 12:23:27 1998
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(envelope-from Roland.Wagner@dlr.de)
From: Roland.Wagner@dlr.de
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Date: Wed, 18 Feb 1998 20:20:42 +0100 (CET)
Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.EDU
Message-Id: <980218202042.2140029c@terra.pe.ba.dlr.de>
Subject: DLR cumulative freq. diagrams
Content-Length: 2679
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********************************************************************************
Berlin, 18-Feb-1998
Dear Colleagues,
We have completed crater size-frequency measurements in some of the areas
observed during E12 and compared them to measurements of earlier orbits.
The files are in Vicar format on /home/ssi/review.
Due to insufficient space, the four cumulative diagrams do not contain frame
numbers. These are listed here (last four digits of RIM count for E12 images,
full RIM number for frames of earlier orbits).
(1) Ncumplot_E12_1.VIC
-----------------------
This diagram combines cumulative distributions measured on C3 wedge frame
S0368639400 and E12 wedge02 frames 2811, 2814, 2818, 2821, 2825, 2839, 2842
(unit preliminarily called "ridged terrain, undivided" (rtu)), and dark wedges
(measured on frames 2825, 2828). The distributions show steep slopes (about
-3), similar to what we found in other regions on Europa. Distributions
measured on both C3 and E12 data fall more or less on the same curve. Also,
ages for ridged terrain and dark wedges are pretty similar within uncertainties.
(2) Ncumplot_E12_2.VIC
-----------------------
This diagram contains the same measurements obtained on C3 and E12 wedge 02
(same frame numbers), but compared to the matrix of Conamara Chaos outside
Pwyll bright ray (E6 frame S0383717526 and 7513 (eastern part). The age
of the matrix material is slightly younger than for bright terrain in the
wedges.
(3) Ncumplot_E12_3.VIC
-----------------------
This summary diagram combines measurements of E12 wedge 02, C3 wedge
(frame numbers see (1)), selected areas of E6 bright plains 02 (frame numbers
S0383718613 and 8226), and large craters and "brown spots" measured on Voyager
data by Lucchitta and Soderblom (1982, "Satellites of Jupiter"). All data,
measured on both data sets, fall more or less on the same curve. Cumulative
frequency variations are minor. Absolute ages in our model I for all areas
shown in (1), (2) and (3) are on the order of 1 b.y.
(4) Ncumplot_E6_Pwyll_ray.VIC
------------------------------
This diagram shows a comparison of counts obtained on E6 56 m/pxl images
where the Conamara chaos matrix was subdivided into terrain lying inside the
Pwyll bright rays (frame S0383717513 and outside the Pwyll ray (frame
S0383717526 and eastern part of S0383717513). There is no difference in
cumulative frequency between inside and outside Pwyll ray (after eliminating
obvious secondaries).
Regards
Gerhard Neukum and the DLR Galileo Team
================================================================================
>From eliz@noao.edu Thu Feb 19 16:52:00 1998
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Date: Thu, 19 Feb 98 16:51:58 MST
From: eliz@noao.edu (Elizabeth Alvarez del Castillo)
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>From granahan@lava.net Thu Feb 19 16:40:30 1998
X-Sender: granahan@harpo.sti.hawaii.com (Unverified)
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
To: mbelton@noao.edu, head@pggipl.geo.brown.edu, GREELEY@atlas.la.asu.edu
Subject: SSI/NIMS Pwyll composition map
Cc: jean@sti.hawaii.com, rcarlson@jpluvs.jpl.nasa.gov,
dmatson@jpluvs.jpl.nasa.gov, tjohnson@jpltvj.jpl.nasa.gov
Dear Michael, Jim, and Ron,
I have finally completed my first cut at the SSI/NIMS Pwyll map for your
evaluation. You can find the image file on rushmore in
/home/ssi/review/e12pwyllnimssi.tif
Descriptions of this image file can be found on the unlinked web page at:
http://www.lava.net/~granahan/pwyll.html
Please let me know about what revisions I can make for you. I also
reconfirmed with Bob Carlson that it is permissable for you to use this
product at the March 2 press briefing.
--James Granahan
********************************************************************
Dr. James C. Granahan e-mail: granahan@lava.net
Science & Technology International phone: (808) 540-4745
733 Bishop St.,Suite 3100,Makai Tower fax: (808) 540-4850
Honolulu, HI 96813 pager: 1-800-609-5360
********************************************************************
E12 SSI/NIMS PWYLL CRATER MAP
----------------------------------------------------------------------------
This initial map is a merged SSI and NIMS data product of the Europa crater
named Pwyll. It was created from the SSI Image S0426268700.4 and the
12ENCPWYLL01A_LWK03.IOF NIMS data cube that were obtained during the E12
encounter. The scale of this map is 106.45 m/pixel (SSI resolution) at 72
dots per inch. The NIMS resolution is 1.25 km/pixel. Both data sets were
projected in an orthographic projection centered on the crater Pwyll (~25 km
diameter). This map identifies regions of Pwyll that have a high
concentration of water ice on the surface and that have a high evaporite
content (something related to magnesium sulfate -- like epsomite). This data
product was prepared by James Granahan at Science & Technology
International.
[Image]
Green = Areas with only SSI imagery coverage.
Blue = Areas with high evaporite content.
Red = Areas with a relatively high water ice content.
Blue >> Red = Areas which grade from high evaporite content to high water
ice content.
=============================================================================
>From ssi_science-request@noao.edu Fri Feb 20 17:10:51 1998
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Date: Fri, 20 Feb 1998 17:09:18 -0700
From: Bill Merline
Message-Id: <199802210009.RAA25252@yeti.boulder.swri.edu>
To: ssi_science@noao.edu
Subject: E12 craters
Cc: cchapman@yeti.boulder.swri.edu, merline@yeti.boulder.swri.edu
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Status: RO
Clark has produced a new Europa crater plot, containing
new measurements of Beau Bierhaus of the E12 Europa
Chaos plates vs. matrix.
The file e12.craters.crc.gif has been placed on rushmore in
/home/ssi/review .
Bill
=======================================================================
>From ssi_science-request@noao.edu Mon Feb 23 11:23:00 1998
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Date: Mon, 23 Feb 1998 11:20:20 -0700
From: Bill Merline
Message-Id: <199802231820.LAA23320@yeti.boulder.swri.edu>
To: ssi_science@noao.edu
Subject: New E12 crater plots
Cc: merline@yeti.boulder.swri.edu
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Status: RO
Commentary on E12 Conamara Chaos Crater Counts
We have posted on rushmore, in /home/ssi/review, two R-plots of
crater frequencies in Conamara Chaos, measured by Beau Bierhaus.
They make two fascinating points: (1) secondary craters from Pwyll
dominate over background craters by a factor >10, thus the background
crater density (some combination of primaries and non-Pwyll-ray
secondaries) is extremely low; and (2) the density of craters in the
matrix is usually at least a factor of 5 less than on adjacent plates.
As we noted during the science telecon, and Erik Asphaug has emphasized
in a recent message, point (1) means that most of the small craters must
have formed simultaneously so that point (2) does *not* mean that the age
of the matrix is much younger than the plates. Instead, it means that
(a) Secondary projectiles form craters that are smaller in the matrix than
on the plates (meaning that the matrix is a harder, stronger substrate, as
Erik described);
(b) Secondary projectiles form shallower, less recognizable craters in the
matrix; or
(c) Secondary craters are eroded or degraded more rapidly in the matrix
than on the plates (e.g. by ongoing "activity" within the matrix).
There is a tendency for few of the small matrix craters to have sharp
morphologies, slightly favoring interpretations (b) or (c) rather than (a).
FIRST FIGURE (e12craters.crc.gif): This is a "Relative Plot" (R-plot) of
crater densities on Europa. Shown for reference is the typical density of
craters in "saturation equilibrium" with impact cratering. Also, earlier
counts are shown, including the "pits" identified in G1 (related to the
pits/domes/spots phenomenon) and the C3 Wedges frame containing only
2 sizeable impact craters. The open red symbols represent various E6
counts in the plains adjacent to Conamara Chaos and within the Chaos.
Counts with error bars show the average crater densities -- separated by
whether they are on plates or in the matrix -- from 4 high-resolution E12
frames (71900, 71926, 71939, and 71952; the first is in the Pwyll ray, the
last far from the ray). The counts are dominated by the frame within the
ray. The figure illustrates the substantial difference in crater densities
between plates and matrix.
SECOND FIGURE (e12craters.crc2.gif): An R-plot, in the same format as the
first figure, showing the counts separated by distance from the ray as well
as by whether they are of plates or matrix. Despite the maze of error bars,
the trends are clear. Note that the distances from the ray are coded both
by color and by shape of symbol (green triangles are from 71900 that is
within the ray; blue diamonds are an average of 71926 and 71939 that are
outside of the ray; and red circles are for 71952 that is farthest from the
ray). Individual counts for plates (open symbols) and matrix (solid symbols)
are also indicated. Note that bins containing zero craters are not plotted,
so absence of symbols on the right side of the group indicate zero craters
of those sizes. These data do not clearly demonstrate an effect we
thought we perceived in the images, namely that larger craters are
especially rare in the matrix.
AN IMPORTANT POINT HERE: There is nothing subtle about the differences
observed. Densities "far from ray, in matrix" are 50 times lower than
those "within ray, on plates".
Clark Chapman, Bill Merline, Beau Bierhaus
====================================================================
>From eliz@noao.edu Mon Feb 23 11:26:43 1998
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From: eliz@noao.edu (Elizabeth Alvarez del Castillo)
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To: nalin@noao.edu
Subject: Another product
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>From granahan@lava.net Mon Feb 23 11:14:06 1998
To: mbelton@noao.edu, head@pggipl.geo.brown.edu, GREELEY@atlas.la.asu.edu,
rcarlson@jpluvs.jpl.nasa.gov
Subject: Improved registered SSI/NIMS Pwyll Map
Cc: jean@sti.hawaii.com
Dear Michael, Jim, Ron, and Bob,
I have put my updated E12 Pwyll map (with hopefully inproved
co-registration) on rushmore in /home/ssi/review/e12pwyllnimssi.tif
and viewable in the following unlinked site at
http://www.lava.net/~granahan/pwyll.html --James Granahan
=======================================================================
>From adc@mipl7.jpl.nasa.gov Sat Feb 21 16:32:10 1998
Subject: Here they are - image files
To: "Amy.H.Culver" , eliz
Cc: "Jan.R.Yoshimizu" ,
helen mortenson ,
"Susan.K.Lavoie"
Hi Liz,
Jan and I have completed the products Mike requested, and I believe we're
providing everthing requested with one exception noted below. The images
are on Rushmore in /home/ssi/review/e12_pr and are identified by the last
4 digits of the SCLK unless otherwise named. We're assuming you can read
both the tiff and VICAR files, but if you have problems with them, let us
know and we can convert them for you.
We will wait to hear from you before sending them to the film recorders
and photo lab. The files are:
1913.vic
1939.vic
1952.vic
2378.vic
2825_28.tif
2828.vic - This one wasn't MTF corrected because it degraded structure in
the image.
2842.vic - For Torrance
2846.vic - For Torrance
e12_2pwyll.vic
europa_prov_chaos.tif
pwylln_color_new.vic
I'm not here on Monday but Jan is set up to complete the processing.
Amy
----------------------
Amy D. H. Culver
(818) 393-3786
adc@mipl7.jpl.nasa.gov
=======================================================================
>From eliz@noao.edu Mon Feb 23 11:11:28 1998
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From: eliz@noao.edu (Elizabeth Alvarez del Castillo)
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To: nalin@noao.edu
Subject: Please pull, print, and archive this
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>From Geoffrey_Clark_Collins@Brown.edu Sun Feb 22 11:45:43 1998
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To: belton@jupiter.tuc.noao.edu, eliz@noao.edu, sue.lavoie@jpl.nasa.gov
Subject: Requested PR product
Hello, Mike...
As you suggested to Bob and I on the phone on Friday, we made up a PR
product of the C3 wedges frame with an outline showing the location of the
DLR stereo model area. It is available on the brown ftp site, in the
E12_PR folder with the other products.
- Geoff Collins
======================================================================
>From ssi_science-request@noao.edu Tue Feb 24 01:46:36 1998
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Date: Tue, 24 Feb 1998 09:45:34 +0100 (MET)
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: perspective Pwyll
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We put the following new perspective images on rushmore
(in /home/ssi/review):
1. pwyll_persp_col_15504.tiff
Perspective view of crater Pwyll with colors indicating heights.
A HSI- transformation (Huge, Saturation, Intensity) was applied to the
DTM and frame S0383715504.
Height exaggeration is 4.
2. pwyll_persp_col_68700.tiff
Same as 1. but with frame S0426268700.
3. pwyll_ortho_col.tiff
Orthophotos (rectified images) of Pwyll with colors indicating heights.
Top left: DTM + frame S0383715504
Top right: DTM + frame S0426268700
Bottom : DTM + frame S0426268700
Gerhard Neukum and the DLR SSI Team
========================================================================
>From ssi_science-request@noao.edu Wed Mar 11 06:00:52 1998
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Date: Wed, 11 Mar 1998 13:59:21 +0100 (MET)
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: E12 crater counts
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Berlin, 11-Mar-1998
Dear Colleagues,
We have put several cumulative and relative crater size-frequency diagrams
on rushmore directory:
/home/tyr/e12
Areas of measurements in the E12 pass 1 mosaic of Conamara Chaos are shown in
our mosaic DRL_E12CHAOS_PASS1COUNTS.VIC. Format is standard Vicar.
Cumulative and R-plots are in PICT-Format. The file names and contents are:
(1) Ncum_e12.pct (cumulative) and Nrel_e12.pct (R-plot)
In these diagrams, measurements of primary craters within and outside
the Pwyll ray area are compared to measurements of *ALL* craters -
regardless if they are of primary or secondary origin. Area within Pwyll
ray is mostly in SSI frames with RIM counts S0426271900 and 1913 (Matrix
area M1). Frames 1926, 1939 and 1952 mostly comprise the area outside
Pwyll ray (matrix areas M2 - M7).
(2) Ncum_e6_e12_1.pct (cumulative) and Nrel_e6_e12_1.pct (R-plot)
Diagram showing measurements on E6 imagery inside Pwyll ray compared to
E12 measurements inside and outside Pwyll ray. Only primary craters
(eliminating secondary) were measured. Solid line is the lunar production
function empirically adjusted to impact conditions on
Europa (D (Europa) / D (Moon) = 1.3; D: crater diameter).
(3) Ncum_e6_e12_2.pct (cum.) and Nrel_e6_e12_2.pct (R-plot)
Same as (2), but measured for *ALL* craters.
(4) Ncum_e6.pct (cumulative) and Nrel_e6.pct (R-plot)
This diagram is similar to the one that was already sent to rushmore (*).
Here, measurements for *ALL* craters are also included. The counts were
carried out on SSI images with RIM counts S0383717500, 7513, 7526 and 7539.
(*) see e-mail to ssi_science Feb. 18
Observations and Interpretations:
-----------------------------------
(1)
We made individual measurements in order to separate primaries from
presumably secondary craters and to obtain a percentage of secondaries
versus primaries. The label "all craters" in files Ncum_e12.pct,
Ncum_e6_e12_2.pct and Ncum_e6.pct (and the respective R-plots) means that
everything looking like a crater was measured. For the "regular" measurements,
craters presumably secondaries were not measured.
(2)
Below a crater diameter of 60 m, the role of erosion of smaller craters is
clearly visible. The relative distribution drops off more sharply
than would be expected from image resolution alone (all R-plots showing E12 data).
Also, there are processes within the matrix by which the smaller craters are
preferably destroyed and/or deformed. These processes are erosion and
total destruction on slopes and tectonic resurfacing which we think was
taking place in the matrix even more intensely than on Ganymede.
(3)
The E12 data don't give us more information than E6 since smaller craters are
largely affected by erosion. E12 and E6 data should not be treated separately.
For extracting ages, we favor using the E6 data since smaller craters are
largely affected by erosion etc., as stated in (2).
(4)
Measurements of the largest craters in E12 data are within uncertainties
compatible with E6 data. Statistics of E12 data is worse since the total area
is smaller. Hence, no more information on ages or size-distribution
characteristics can be gained from counts on higher resolution images.
(5)
Some investigators attribute the steepness of the distributions at smaller
diameters to the abundant occurrence of "background secondaries". With only
a small number of large craters on Europa to produce secondaries, we don't
see such a possibility; there are many more (orders of magnitude) small
craters on Europa than could be produced by the few large undebated
primaries. This means that like on Ganymede and Callisto the steep
small-crater distribution is due to primary impacts (contaminated in a few
places like the Pwyll ray by secondaries).
Regards -- Gerhard Neukum
================================================================================
>From ssi_science-request@noao.edu Thu Mar 26 20:46:02 1998
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Date: Fri, 27 Mar 1998 4:45:21 +0100 (CET)
From: Tilmann Denk
Reply-To: Tilmann.Denk@dlr.de
To: ssi_science@noao.EDU, tom@kahana.pgd.hawaii.edu
CC: Tilmann.Denk@dlr.de
Message-Id: <980327044522.34c00564@terra.pe.ba.dlr.de>
Subject: E12 Conamara Chaos color image
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==============================================================================
To: Europaphiles
From: Tilmann Denk
Subj: E12 Conamara Chaos color image
Date: 26-Mar-1998
Dear Europans and colorphiles,
a color image of the south-western part of the Europa high-res. DarkLinColor
mosaic has been put on Rushmore's /home/ssi/review directory, its name is
E12DLR_Chaos_Color_1.tiff
It contains most parts of Conamara chaos, some lenticulae, one Triple band
(Agave Linea), some patches from Pwyll rays, and some "older bright plains".
MAIN FINDINGS:
(1) Four different color units can be observed: Reddish-brownish terrain,
bright-greyish areas, bright white patches, and yellowish patches.
(2) There are two different types of "rafts/Titanics" within Conamara Chaos:
Some have the brownish color of the matrix, while others have the bright-
greyish color of the "older plains" in the neighborhood of Conamara Chaos.
(3) The Pwyll ejecta appears rather white in some areas and more yellowish in
others.
(4) There are narrow, bright, yellowish spots inside Conamara Chaos.
(5) The flanks of Triple band Agave Linea and one adjacent lenticula are the
darkest and "reddest" features in the image, even redder than the Conamara
Chaos matrix.
(6) Greenish or bluish narrow ridges that have been observed in the G7 LOWFOT
and G7 TYRE observations seem to be absent in the Conamara Chaos area.
So far the main observations in this data set, more details are given below.
Viele Gruesse from Honolulu,
-- Tilmann
==============================================================================
GALILEO SSI EUROPA E12 DARK LINEA COLOR 01 OBSERVATION
/home/ssi/review E12DLR_Chaos_Color_1.tiff
OVERALL DESCRIPTION:
The NIR (756nm) filter image (RIM S0426267513.2) has been used for the red
channel, the GRN (559nm) (RIM S0426267401.1) for the green, and the
VLT (415nm) filter (RIM S0426267452.2) for the blue channel. The images have
been co-registered using VICAR software, and the colors have been further
enhanced with Photoshop. The color classification used here refers to these
"enhanced" colors (in "true" colors, all appears more or less homogeniously
brownish/ boring). North is approximately up. The image size is 675x675 pixels
or 1.3 MB, format is TIFF, the resolution is about 170 meters/pxl, the
incident angle is about 60 deg, emission angle 37 deg, phase angle 95 deg
(if the image label info is correct). The sun illuminates the scenery from the
right. The gap near the top of the image is due to missing NIR filter data.
The slight violetish hues are caused by the violet data; these contain a lot
of compression artefacts. The 1MC image (s0426267565.5) is not included in the
composite due to very large data gaps. It was found that the spectral
information of the 1MC data does not differ remarkably from the NIR info,
meaning that a comparison of long-wavelength versus short-wavelength spectral
slopes is feasible with the NIR instead of 1MC filter.
FINDINGS - SOME DETAILS:
(1) Four color units can be observed: (1) Reddish-brownish material of
Conamara Chaos, Agave Linea Triple band, the lenticulae and other "irregular"
features; (2) bright, greyish (slightly bluish) plains, believed to represent
the "older plains"; (3) bright white patches that are associated with Pwyll
rays/ ejecta; and (4) yellowish patches at different sizes. The latter are
probably related to Pwyll ejecta, see below. The "bright-greyish" terrain of
the older surrounding plains might also contain a little bit of the brownish
material, while the Pwyll rays don't.
(2) Inside Conamara Chaos, the matrix has a brownish color (as expected),
and *some* of the plates/rafts have a similar brownish color, while others are
greyish-bright. This might indicate to the colors of the area before the
rafting/ chaos formation; some rafts have originally been associated to brown-
colored ridges, maybe a Triple band, while others (especially to the very left
and close to the center of the frame) have originally been "older bright
plains". The color of the "formerly dark rafts" and of the "newer matrix" are
quite similar for SSI, meaning that the coloring material was the same during
the matrix formation process as well as during the ridge formation process
which occured earlier.
(3) The Pwyll ejecta appears either white or yellow. In areas, where it is not
bright white, the measurements do not suggest a linear mixture between the
dark brownish material and an icy "pwyllish" material, but show very steep
positive spectral slopes from VLT to GRN (low VLT/GRN ratios) and quite small
slopes from GRN to NIR (causing the yellowish color). The only idea that I
have so far why some Pwyll ejecta patches are bright and white, while others
are bright but yellow, is, that in areas where the ejecta might not be opaque
on the surface, the spectral mix signature behaves very unusual and non-
linearly in the way that the steep spectral slope from the brownish underlying
material remains dominating in the VLT/GRN ratio, while the flat, bright
spectrum of the ejecta material is dominating the spectral range from GRN to
NIR. This is usually not observed for other terrains, maybe it is a special
characteristics of bright material, overlying dark reddish material on Europa.
(4) The yellow patches within Conamara Chaos are among the most interesting
features in the frame. A somewhat larger yellowish area can be seen to the
very left in the frame (around Line 450, Sample 30; diameter about 80 pixels),
while several very small yellow patches are located within the Conamara Chaos
area near L499, S185; L187, S196; and L276, S296; probably some more are
there. Another yellow patch is located near Agave Linea at L400, S586. These
yellow spots appear very localized and somewhat unusual in comparison to
other bright white patches that are certainly from Pwyll ejecta. No such
narrow, small, but outstanding yellow patch has been observed so far within
the "older bright plains".
Two possible explanations for the origin are suggested: (a) The yellow spots
are Pwyll ejecta; or (b) these are endogenic features.
(a) Pwyll ejecta - more likely: Measurements of the larger yellowish patch
to the very left in the image show that Pwyll rays that are not very bright
and opaque do have a yellowish color (see also item 3). The NIR/GRN ratio for
the bright Pwyll ejecta as well as the narrow yellowish patches varies only
slightly. Opposite to that, the VLT/GRN ratio shows huge differences, at the
same amount as for the darkest parts of the reddish material, compared to the
bright white features. The yellowish ray centered at the very left of the
frame seems to be spectrally intermediate between the bright white Pwyll
patches and the small yellowish spots inside Conamara Chaos. This is (at the
moment) the main argument that these small spots also come from Pwyll. Another
argument supporting this view is a bright Pwyll-patch that overlaps bright and
dark terrain (L387, S472). The color of the patch that lies over dark terrain
is also intermediate between the bright white Pwyll patches and the small
yellow spots.
(b) Endogenic - more intriguing: It cannot be ruled out that the small
yellow patches are of endogenic, possibly volcanic origin. They have a rather
unusual appearance, and it might be questionable if material lumps flying over
1000 km are able to produce such narrow, but highly concentrated spots.
However, the main argument for the endogenic possibility does not come from
the Conamara color image discussed here, but from the E12 Pwyll color image.
Inside the crater walls of Pwyll, there is also located such a small yellow
spot. (Maybe some of you have already seen it in a small figure on my poster
at LPSC.) It seems very unlikely that ejecta from Pwyll not only returned very
close to the center of the crater, but also remained there from minutes after
Pwyll formation until today. Therefore, this yellow spot inside the Pwyll
crater rim requires another, possibly endogenic explanation. This (so far
unknown) other explanation might also be used for the small yellow spots
inside Conamara Chaos. A final prove might be a possible finding of more
narrow, yellow spots far away from Pwyll. And the unknown relation to the
color of the yellow mottled terrain on the leading side of Europa must also be
considered.
(5) The darkest and reddest parts in the image are the flanks of Agave Linea
and a nearby lenticula (L165, S545). These do no longer follow the trend "the
darker = the redder" for the VLT/GRN value that is usually observed over the
global Europan surface. While the NIR/GRN ratio is still higher than for
other, "less red" terrain, the VLT/GRN ratio no longer decreases, but instead
appears to be "saturated". Such a "saturation" has also been seen in G7
high-res Europa images (G7 LOWFOT; I have shown the data at the Dec-97 Hawaii
SSI/NIMS meeting. Maybe, they are in the meeting minutes).
(6) Although some young, narrow ridges cross the older terrain, none of them
has the bluish or greenish color that has been observed for similar features
in G7 high-res color images (TYRE, LOWFOT). Possibly, such "colorful ridges"
do not form inside the mottled terrain, but only in areas dominated by bright
plains as the G7 areas are.
==============================================================================
>From ssi_science-request@noao.edu Tue Mar 31 11:38:43 1998
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From: Roland.Wagner@dlr.de
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Date: Tue, 31 Mar 1998 20:37:16 +0200 (CET-DST)
Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.EDU
Message-Id: <980331203717.3640011d@terra.pe.ba.dlr.de>
Subject: Preliminary E12 wedges03 mosaic
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********************************************************************************
Berlin, 31-Mar-1998
Dear Colleagues,
We have put a preliminary mosaic of the E12 wedges03 target area on rushmore
/home/ssi/review. File name is e12eswedges03mos.pict (Photoshop pict format).
Projection is mercator, map scale 0.055 km/pxl.
Photoshop was used to put the images together, more or less without seams and
offsets.
Enjoy ! -- Roland Wagner
================================================================================
>From ssi_science-request@noao.edu Wed Apr 1 17:55:58 1998
From: Tilmann Denk
To: ssi_science@noao.edu
Subject: Galilean satellites 'family portrait'
Aloha,
people who like 'family portraits' of the Jovian satellites might have a look
on file "E11DLR_2nd_family_portrait.tiff" in Rushmore's /home/ssi/review
directory. It contains very low phase observations (0-4 degrees) of the four
Galilean satellites, with an Io image from G2, Europa from C9, Ganymede from
C10, and Callisto from E11. Parts of the processing of the Europa and Callisto
images were done by Paul Geissler and Moses Milazzo, respectively. For scale
comparison, Amalthea and Thebe are also included.
-- Tilmann
>From ssi_science-request@noao.edu Thu Apr 9 15:44:26 1998
Reply-To: Tilmann.Denk@dlr.de
To: ssi_science@noao.edu
Subject: Galilean satellites 'family portrait', note
The 'family portrait' file "E11DLR_2nd_family_portrait.tiff" in
Rushmore's /home/ssi/review directory has been replaced by an improved
version. The filename did not have changed. If you already downloaded
the old file, please delete it and replace it by the new one.
-- Tilmann
======================================================================
>From Tilmann.Denk@dlr.de Wed Apr 1 15:58:48 1998
To: eliz@noao.edu
Subject: 2nd famili portrait on Rushmore
the new 'Familienfoto' is now on Rushmore's /home/ssi/review, its name is
E11DLR_2nd_family_portrait.tiff
Just for fun, I also added Amalthea and Thebe images; you might keep them in
the release if you want (my preference).
For the caption, the following information (but better formulated) should
still be added:
- There is a scale bar in the image, its length is 1000 km
- Callisto SSI color data were not complete; the right edge and the polar
areas have been more or less simulated with Voyager and Galileo data. This is
probably the reason why thye dark patches that are common at equatorial
latitudes do not appear in the south-polar hemisphere.
-(if Amalthebe remain) Amalthea is number 5, Thebe no. 7 in size of Jupiter's
16 known satellites. They are shown to scale here, too. Note the huge size
difference between them and the Galilean satellites (which are no. 1-4 in size
of the JupSats).
I also put the single images of the Galilean Satellites in "maximum
resolution" on Rushmore's /home/ssi/review. Their names:
G2_Io_TD_enhTD.tiff
C9_Europa_PG_enhTD.tiff
E11_Callisto_MM_enhTD.tiff
(Ganymede is at "max-res" in the family portrait.)
For Europa and Callisto, I included the original version provided by Paul
Geissler ('PG') or Moses Milazzo ('MM') on the left, and my "enhanced"
('enhTD') version to the right. For Io, only my enhanced version is included.
You might even select both Europa images for press-release, the left one as
the "true color" version, and the right-one as the "enhanced color" version.
The same might be done for Callisto, but I guess you will use Alfred's images.
In the unlikely event that you indeed want to use the E11_Callisto_MM_enhTD
image, please tell me.
======================================================================
>From ssi_science-request@noao.edu Fri Apr 3 06:06:51 1998
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: new Europa mosaics
Berlin, 3-Apr-1998
Europaphiles,
We have put two mosaics (both in Vicar format) on rushmore in /home/ssi/review:
(1) File dlr_e12wedge03_c3_cntxt.mos shows the target area E12 wedge_03 in
C3 context (plus a bit of Voyager), resolution is 55 m/pxl; map label is
as follows:
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1565.0
B_AXIS_RADIUS=1565.0
C_AXIS_RADIUS=1565.0
BODY_LONG_AXIS=0.0
MAP_SCALE=0.05499999970197678
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=200.0
SPHERICAL_AZIMUTH=0.0
CARTESIAN_AZIMUTH=0.0
LINE_PROJECTION_OFFSET=-7833.81640625
SAMPLE_PROJECTION_OFFSET=359.6362915039063
This file has now been deleted on atlas.la.asu.edu and brnpsg.geo.brown.edu.
(2) File dlr_conamara_chaos_e12_cntxt.mos is the pass1+2-Mosaik of Conamara
Chaos in E6 context with 10 m/pxl resolution. Map label information is:
TARGET_BODY='EUROPA'
MAP_PROJECTION_TYPE='MERCATOR'
COORDINATE_SYSTEM_NAME='PLANETODETIC'
POSITIVE_LONGITUDE_DIRECTION='WEST'
A_AXIS_RADIUS=1565.0
B_AXIS_RADIUS=1565.0
C_AXIS_RADIUS=1565.0
BODY_LONG_AXIS=0.0
MAP_SCALE=0.009999999776482582
CENTER_LATITUDE=0.0
CENTER_LONGITUDE=270.0
SPHERICAL_AZIMUTH=0.0
CARTESIAN_AZIMUTH=0.0
LINE_PROJECTION_OFFSET=24775.201171875
SAMPLE_PROJECTION_OFFSET=12630.6005859375
Best regards and enjoy !
Angelika Hoffmeister
Ursula Wolf
Thomas Roatsch
Roland Wagner
================================================================================
>From ssi_science-request@noao.edu Tue Apr 7 07:03:49 1998
X-Sender: Geoffrey_Clark_Collins@postoffice.brown.edu
To: ssi_science@noao.edu
Subject: E12 Wedge02 partially reconstructed images
Dear team,
While looking at the three northernmost E12 wedge02 frames that came back
in pass 2 with the "tire tracks" running up the left sides of the images, I
noticed that the images can be mostly salvaged by shifting every other line
of the railroad track several pixels to the left. I put these images back
together in photoshop, and they are available in TIFF format for your
viewing pleasure on rushmore in /home/ssi/review:
s0426272849.rec.tiff
s0426272853.rec.tiff
s0426272856.rec.tiff
Anybody who is working on mosaicking wedge02 should use these images, as
there's quite a bit of good data there. One can convert the TIFF files to
vicar and stick the label back on them. - Geoff Collins
======================================================================
>From Cynthia (and the LPL conspiracy) phillips@lpl.arizona.edu
To: ssi_science@noao.edu
Subject: E14 Mannann'an images
I've put a preliminary version of the new E14crater01 color
images of the crater Mannann'an on /home/ssi/review
e14mann.cub -> 32-bit isis cube
(contact me for other versions).
I've also been enjoying the higher-resolution transect of
Mannann'an, especially the shadow ship (or collapse feature,
for the geologically-minded) in image s0440948665. I've put
an image with the e14 color superimposed on the higher-resolution
clear image on /home/ssi/review, as well:
e14shadowship.tif
(contact me if you want the huge ISIS cube for any reason).
These are both preliminary versions....I'll produce better ones
when we get more data (or I have time to clean up the data we have
so far).
PS: these images are all on rushmore.jpl.nasa.gov
>From ssi_science-request@noao.edu Wed Apr 15 11:06:03 1998
>From Erik
Subject: Re: E14 Mannann'an images
To: phillips@lpl.arizona.edu (Cynthia Phillips)
Cc: ssi_science@noao.edu
Thanks for posting those, Cynthia.
And we thought guessing the transient cavity diameter for
Pwyll was difficult!
One key difference between Mamann'an and Pwyll is clear: this
impact led to circumferential fracture, whereas Pwyll did not.
Perhaps this kind of deformation and local tectonism will be the
fate of Pwyll as it matures?
>From ssi_science-request@noao.edu Wed Apr 15 11:53:36 1998
>From -Cynthia
To: ssi_science@noao.edu
Subject: More E14 mannann'an images
Due to popular demand, I've placed a vicar version of my
e14 mannann'an color image on rushmore, in /home/ssi/review:
e14mann.vic
I've also mosaiced the hires frame, seen in synthetic color in
e14shadowship.tif, into the green frame of the lower-res color.
(color res ~80 m/pix; clear hires ~20 m/pix). This shows that
the crater rim of Mannann'an is at the upper left of the
synthetic color e14shadowship image - the dark / reddish material
is clearly visible in larger quantities outside the crater rim
than inside. The collapse feature, with the circumferential fractures
and spider-like radial fractures inside, is located inside the
Mannann'an crater....Erik, are these the circumferential fractures
you were referring to? I don't see any fractures surrounding
Mannann'an itself. The collapse feature is only about 3 km in
diameter.
These images are also on rushmore, in /home/ssi/review:
e14mann_hi8.mos (8-bit isis cube)
e14mann_hi.vic (8-bit vicar image)
Enjoy! Let me know if you have any questions, comments, requests
for other versions, etc etc.
>From ssi_science-request@noao.edu Wed Apr 15 12:50:06 1998
Subject: Re: More E14 mannann'an images
To: phillips@lpl.arizona.edu (Cynthia Phillips)
Cc: ssi_science@noao.edu
> The collapse feature, with the circumferential fractures
> and spider-like radial fractures inside, is located inside the
> Mannann'an crater....Erik, are these the circumferential fractures
> you were referring to? I don't see any fractures surrounding
> Mannann'an itself.
Oops... I misinterpreted the scale in your original .tif image. Thanks
for the clarification and the latest .vic posting.
Erik
======================================================================
>From ssi_science-request@noao.edu Wed Apr 15 13:30:38 1998
X-Sender: Geoffrey_Clark_Collins@postoffice.brown.edu
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
To: ssi_science@noao.edu
Subject: Mannann'an anaglyph
Hello, team...
I have constructed a preliminary red-blue stereo anaglyph of the new E14
Mannann'an frames. It's available on rushmore in /home/ssi/review, named
e14_brn_mann_stereo.tif.
The red (left) channel is a version of Cynthia's color CRATER01 mosaic,
which I reprojected to the scale and perspective of the CRATER02 frames,
then I averaged the three filters together (weighting green more) to
approximate a clear-filter image.
The blue (right) channel is frames 2 and 3 of the CRATER02 sequence,
unreprojected and manually positioned top of the CRATER01 frame.
Due to the difference in resolution between the two images, the stereo is
best viewed when slightly "zoomed out" from the full resolution of the
CRATER02 images. I prefer to view this image at a 2:1 scale on my computer
screen.
A few points of interest:
- The "arachnoid" shows up as being in a pit, though the middle may be
domed slightly.
- There seems to be a trough around the edge of the crater floor, at the
base of the wall.
- There are a few large plateaux, and many smaller hummocks sticking out of
the floor.
- There are some correlations of bright and dark material with albedo. For
instance, many of the dark spots on the crater floor appear to be
high-standing.
Happy stereo viewing!
- Geoff
>From ssi_science-request@noao.edu Wed Apr 15 13:47:55 1998
X-Sender: Geoffrey_Clark_Collins@postoffice.brown.edu
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
To: ssi_science@noao.edu
Subject: RE: Mannann'an anaglyph
Oops:
>>There are some correlations of bright and dark material with albedo.
I meant to say: correlations of bright and dark material with topography.
- Geoff Collins
>From Geoffrey_Clark_Collins@Brown.edu Mon May 18 09:17:45 1998
-new image and an attempt at a caption on rushmore, in /home/ssi/review:
e14_brn_mann_stereo_pr.tif
e14_brn_mann_stereo_pr.txt
e14_brn_mann_stereo_pr.tif From collins on 5/18/98 for PR/releases
File name: e14_brn_mann_stereo_pr.tif
Location of file: on Rushmore in /home/ssi/review
SCKLs: s0440948000, s0440948028, s0440948035, s0440948665
Produced by Brown University
http://www.planetary.brown.edu/planetary/index.html
(Note: this release covers the same area as e14mann2_hicolor.tif)
TITLE: Topography within Europa's Mannann'an crater
This stereo anaglyph shows the rim and interior of the impact crater
Mannann'an, on Jupiter's moon Europa. To view the image in stereo,
obtain a pair of red-blue stereo glasses, and place the red filter
over your left eye and the blue filter over your right eye. The stereo image
reveales the rim of the crater, a tall ridge near the left edge of the image,
and numerous small hills on the bottom of the crater. One of the most striking features is the large pit surrounded by circular cracks on the right side
of the image, with dark radiating fractures in its center.
The right (blue) image is a high resolution image (20 meters per
picture element) taken without a color filter, while the left (red) image
is composed of lower resolution (80 meters per picture element) color images
taken through violet, green, and near-infrared filters, averaged to approximate an unfiltered view.
North is to the top of the picture and the sun illuminates the scene
from the east (right). The image, centered at 3 degrees north latitude and
120 degrees west longitude, covers an area approximately 18 by 4 kilometers
(11 by 2.5 miles). The finest details that can discerned in this picture
are about 40 meters (44 yards) across. The images were
taken on March 29th, 1998 at 13 hours, 17 minutes, 29 seconds Universal Time
at a range of 1934 kilometers by the Solid State Imaging (SSI) system
on NASA's Galileo spacecraft
======================================================================
>From all_hiips-request@noao.edu Thu Apr 30 13:52:13 1998
To: all_hiips@noao.edu
Subject: E14 Tyre prelim mosaic
I have put a preliminary mosaic of E14 tyre combined with Paul Geissler's G7
color mosaic on:
Rushmore:/home/ssi/review/ and also on
Pirl:/galileo3/mosaics/Europa/.
On Rushmore: tyre_968.vic, tyre_grn.vic, tyre_vio.vic, E14_tyre_add.cub,
and E14_tyre_add.tif.
On Pirl: E14_tyre_add.tiff and E14_tyre_add.cub.
enjoy.
Moses
======================================================================
>From ssi_science-request@noao.edu Thu Apr 30 14:25:00 1998
Reply-To: Tilmann.Denk@dlr.de
To: ssi_science@noao.edu
Subject: E14 DarkSpot Stereo by Roland
Europa- and anaglyphophiles,
new great stereo stuff made by Roland is on Rushmore, see his message below.
Enjoy! -- Tilmann
******************************************************************************** Berlin, 30-Apr-1998
Europaphiles,
I have put a preliminary anaglyph version of the E14 dark spot color/stereo
target area on rushmore /home/ssi/review,
file name e14esdrkspt_anaglyph_rg.tiff.
The images are map projected, the drkspt01 mosaic was created with photoshop.
The anaglyph image is in red/green (I have a problem seeing stereo on red/blue).If you prefer red/blue, please let me know.
The dark "spot" appears as a low-lying area separated from bright terrain in
the East by scarps. Also, the dark "spot" seems to be deepest in the center.
Best regards -- Roland Wagner
>From Thomas.Roatsch@dlr.de Tue May 12 06:01:16 1998
To: Elizabeth Alvarez del Castillo
Cc: Roland Wagner , Uli Koehler
Subject: RE: Europa releases / May 21
As "very talented colleagues" we created not only the red/blue version of
Rolands anaglyph. We also put a new anaglyph by Bernd Giese (he also
attends the Nantes meeting) on rushmore. The description of this anaglyph
follows with the next mail.
You can find all files in VICAR format on rushmore in /home/ssi/review,
they are
darkspotstereo.red, darkspotstereo.grn, darkspotstereo.blu (Roland)
e12e14wedgestereo.red, e12e14wedgestereo.grn, e12e14wedgestereo.blu
(Bernd)
e12e14wedgestereofr.red, e12e14wedgestereofr.grn, e12e14wedgestereofr.blu
(Bernd with frame)
Enjoy
Thomas and Uli
>From ssi_science-request@noao.edu Wed May 13 05:38:56 1998
X-Sender: koehler@terra.pe.ba.dlr.de
To: ssi_science@noao.edu
Subject: "DarkSpot" Stereo Anaglyph: Additional Information
Dear SSI colleagues,
following are additional informations for the "DarkSpot" stereo
anaglyph we have put on /home/ssi/review yesterday, and some basic
words for a proposed "caption" in case the image will be selected
for release. Any comments are welcome.
INFORMATION FOR DLR STEREO "DARK SPOT" ANAGLYPHS &
SUGGESTION FOR A FIGURE CAPTION FOR E14DRKSPT STEREO ANAGLYPH
-------------------------------------------------------------
The stereo anaglyph product
darkspotstereo.* ("*" = red, grn, blu; VICAR format)
was constructed from SSI frames S0440948800, 813 and
826 (14ESDRKSPT01) and S0440949628 (14ESDRKSPT02).
Wear red glasses left, blue glasses on the right eye.
The anaglyph image shows a region imaged by Galileo SSI during orbit E14.
The images of the clear and the green filter were map projected to the same
scale (50 m/pxl) and the same orientation. The region shown is situated at
1 deg. S / 225 deg. W. North is pointing upward.
The dark spot appears as a low-lying area. In the west, it is bounded by a
scarp with terraces, perhaps produced by normal faulting. The dark spot is
deepest in the center of the region. Slopes into the dark spot are more
gentle in the East. Ridges are covered by dark material toward the center
of the dark spot. A W/SE-trending scarp extends from the bright plains into
the dark spot. The ortheastern block is higher than the southwestern one.
Embayment of bright terrain and ridges by dark material suggests dark
material was emplaced as a fluid or brine.
Only a small number of impact craters may be seen. Some of them appear in
groups and hence may be secondaries, likely from crater Manannan. Some
others are covered or flooded by dark material.
Best wishes from Nantes/France ! -Roland Wagner and Bob Pappalardo
on behalf of Gerhard Neukum, from Berlin: Uli Koehler, DLR
>From ssi_science-request@noao.edu Wed May 13 07:28:08 1998
Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.edu
Subject: DLR anaglyphs / corrections
Dear colleagues,
I would like to correct some small errors in our two e-mails concerning
our anaglyph images.
For the 12ESWEDGE_02/03 stereo anaglyph, North is not pointing upward,
but rotated counterclockwise by 30 deg.
In the text concerning the E14 dark spot anaglyph, it should read
"NW/SE-trending scarp" and "northeastern".
Best regards from Nantes -- Roland Wagner
======================================================================
Date: Tue, 12 May 1998 15:05:23 +0200 (MET DST)
From: Thomas Roatsch
To: ssi_science@noao.edu
Subject: new e12/e14 wedges anaglyph
Message-Id:
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Status: R
Dear SSI colleagues,
Bernd Giese of our DLR Galileo group has produced a [as we think]
remarkable stereo of the e12/e14 "wedges". Please have a look on the
stereo anaglyph images, which have been transfered to RUSHMORE
and are located in /home/ssi/review, named:
e12e14wedgestereo.* ("*" = red, grn, blu)
and
e12e14wedgestereofr.* ("*" = red, grn, blu)
The first is without the outlined stereo coverage,
the latter has a frame around the stereo coverage.
As Bernd and Roland Wagner are momentarily in Nantes, France, for a meeting,
they will prepare more detailed explanations on the images right there,
and will let the respective e-mail follow.
Meanwhile, any comments are of course welcome!
Have fun! -
Uli Koehler
Thomas Roatsch
Gerhard Neukum
[The last remaining Galileo's in Berlin]
>From Uli.Koehler@dlr.de Tue May 12 11:38:44 1998
To: belton@jupiter.tuc.noao.edu
Cc: Roland.Wagner@dlr.de, GIESE@terra.pe.ba.dlr.de, Uli.Koehler@dlr.de
Subject: RE: Stereo products......
For all Europa stereo anaglyphs from DLR
red is for the left eye
blue is for the right eye
>From ssi_science-request@noao.edu Wed May 13 05:36:30 1998
X-Sender: koehler@terra.pe.ba.dlr.de
To: ssi_science@noao.edu
Subject: "Wedges01/02" Stereo Anaglyph: Additional information
Dear SSI colleagues,
following is a more detailed description of the stereo anaglyph
images we have put on /home/ssi/review yesterday:
INFORMATION FOR DLR STEREO ANAGLYPHS E12 WEDGES 02/03
-----------------------------------------------------
2 different products of the identical "wedges" region:
- e12e14wedgestereo.* ("*" = red, grn, blu; VICAR format)
- e12e14wedgestereofr.* ("*" = red, grn, blu; VICAR format)
For both images, wear red glasses left, blue glasses on the right eye.
The 2nd File has the stereo overlap outlined with a white frame.
The anaglyph image was derived from 12ESWEDGE_03 frame S0426273800 and
12ESWEDGE_02 frames S0426272825 and S0426272828.
A sinusoidal map projection of 50 m/pxl was applied,
North is pointing upward.
At the top of the image, there is a double-ridge with a deep trough in
between. The digital terrain model shows that
- the ridges are 200 to 300 m above the local surrounding,
- the bottom of the trough is at the same elevation level as the local
surrounding
There is only weak stereo in the remaining part of the anaglyph,
i.e. there may be only small height differences.
=============================================================================
on behalf of Gerhard Neukum, from Berlin: Uli Koehler, DLR
based on infos by Bernd Giese, Roland Wagner, and Bob Pappalardo, Nantes
>From ssi_science-request@noao.edu Wed May 13 07:28:08 1998
Reply-To: Roland.Wagner@dlr.de
To: ssi_science@noao.edu
Subject: DLR anaglyphs / corrections
Dear colleagues,
I would like to correct some small errors in our two e-mails concerning
our anaglyph images.
For the 12ESWEDGE_02/03 stereo anaglyph, North is not pointing upward,
but rotated counterclockwise by 30 deg.
In the text concerning the E14 dark spot anaglyph, it should read
"NW/SE-trending scarp" and "northeastern".
Best regards from Nantes -- Roland Wagner
======================================================================
>From KLEM@dione.la.asu.edu Thu May 7 14:26:46 1998
To: eliz@noao.edu
Subject: 2 europa files
I put two files on atlas: e6mosaics.tif and e6plains.tif
These files show the "best of" the E6 data in context.
E6MOSAICS.TIF shows e6pwyll and e6drklin and their location of the E2
disc. Both of these regions were targets on E12.
E6PLAINS.TIF shows the two high-resolution plains mosaics and their
location in E6DRKLIN. These regions are the conomara chaos and the
large ridge north of the chaos.
Neither of these have been released, and should be.
klem
======================================================================
>From ssi_science-request@noao.edu Mon May 11 02:14:14 1998
To: ssi_science@noao.edu
Subject: 12ESWEDGE context mosaic
Dear colleagues,
We have put a Mercator-projected mosaic of 12ESWEDGE_01 in context with
12ESWEDGE_03 on rushmore/ssi/review. The file is in standard Vicar with a
map label.
DLR_E12WEDGE01_03_CNTXT.MOS
Roland Wagner
Ursula Wolf
Angelika Hoffmeister
Thomas Roatsch
======================================================================
>From ssi_science-request@noao.edu Tue May 12 15:43:18 1998
To: ssi_science@noao.edu
Subject: e12 stereo products
I have made a slightly differnet version of the e12
stereo in the wedges region. The anaglyph of the
prominant double ridge is on rushmore in /home/ssi/review/
e12_stereo_dridge.tif
Red corresponds to the left eye and images s0426272828 and s0426272832
(~25 m/pixel)
Blue corresponds to the right eye and image s0426273800 (~50 m/pixel)
An additonal anaglyph of a dark band to the south
is also on rushmore in /home/ssi/review/
e12_stereo_darkband.tif
Red corresponds to the left eye and images s0426272811 and s0426272814
(~25 m/pixel)
Blue coresponds to the right eye and image s0426273839 (~50 m/pixel)
The entire stereo coverage of the region is in:
e12_wedges_stereo_left.tif
e12_wedges_stereo_right.tif
These images are the same size and just need be printed out
to be viewed under a stereoscope.
All images were reprojected in isis with
center latitude = -4.275
center longitude = 164.835
resolution 25 m/pixel
Enjoy, -Greg
======================================================================
>From KLEM@dione.la.asu.edu Tue May 12 15:55:58 1998
To: eliz@noao.edu
Subject: e14wedges
Hi Eliz -
I processed my fingers to the bone and reprojected/enhanced the wedges image
you requested. I put a copy on atlas and another on rushmore in the usual
locations. The image is e14wedges.vic, and is 5.9 megabytes in size, ortho
reprojection to 100 m/pixel (roughly 3x) in case hard-copy gets made at some
point.
======================================================================
>From ssi_science-request@noao.edu Wed May 13 14:46:43 1998
To: ssi_science@noao.edu
Subject: additional e12 stereo
I have made an anaglyph of the e12 wedges region observed
at 15 m/pixel and 50 m/pixel. The image is on rushmore in
/home/ssi/review/
e12_stereo_15m_50m.tif
Red corresponds to the left eye and images s0426272646, 649, 653,
and 656 (~15 m/pixel)
Blue corresponds to the right eye and image s0426273800, and 826
(~50 m/pixel)
These images were reprojected in isis with
center latitude = -4.885
center longitude = 171.05
resolution 15 m/pixel
Enjoy,
Greg
======================================================================
>From phillips@LPL.Arizona.EDU Wed May 13 15:22:45 1998
To: eliz@noao.edu
Subject: new color mannannan image
I made a new version of that color mannannan hires image, using
a different technique. The results are a bit less "technicolor",
and Paul Geissler at least likes it better. :)
See what you think - it's at:
on pirl.lpl.arizona.edu -> /europa/e14/crater1/e14mann2.hicolor.tif
-Cynthia
======================================================================
>From ssi_science-request@noao.edu Thu May 14 17:11:43 1998
To: ssi_science@noao.edu
Subject: Mannann'an hires mosaics
I've placed two new mosaics on rushmore, in /home/ssi/review
(also available on pirl, in /galileo3/review/Europa )
-> e14mannhires.8mos (8-bit isis cube)
-> e14mannhires.vic (8-bit vicar image)
- this is a mosaic of four of the e14crater2 frames (the fifth
frame doesn't overlap) s0440948652 through s0440948700
-> e14mannhires_cxt.8mos (8-bit isis cube)
-> e14mannhires_cxt.vic (8-bit vicar image)
- this is the same mosaic as before, on top of the green lower
resolution context image s0440948028
All images are in an orthographic projection, at 20 meters / pixel.
I'm working on a new color merged product.
Interesting features in these images:
- we've noticed many nice bowl-shaped secondaries, some with
bright ejecta blankets around them
- in the second image from the left, there's what looks like a
fine-scale fracture feature, perhaps an en-echelon system?
- the "spider" feature is almost, but not quite, in the center
of the crater....but it's probably too small to be
related to a central peak?
Enjoy! Let me know if you have any questions, comments, etc.
-Cynthia Phillips (helped by science discussions with other LPL denizens)
======================================================================
>From ssi_science-request@noao.edu Fri May 15 11:58:49 1998
>From Greg Hoppa
To: ssi_science@noao.edu
Subject: Mannann'an stereo
I have made an anaglyph of the western rim of the crater
Mannann'an. The image is located on rushmore in
/home/ssi/review/e14_lpl_mann_stereo.tif
Red corresponds to the left eye and image s04440948028 (~80 m/pixel)
Blue coresponds to the right eye and images s04440948652, 665, 678, and 700
(~20 m/pixel). The mosaic was created by Cynthia Phillips.
The entire stereo coverage of the region is in:
e14_lpl_mann_stereo_left.tif
e14_lpl_mann_stereo_right.tif
These images are the same size and just need be printed out
to be viewed under a stereoscope.
All images were reprojected in isis with
center latitude = 9.325 center longitude = 266.645
resolution 20 m/pixel
======================================================================
>From hoppa@pirl.lpl.arizona.edu Mon May 18 14:08:15 1998
To: eliz@noao.edu
Subject: Re: Greg's new stereo of Mannann'an
Hi, I put a cropped image in /home/ssi/review/e14_lpl_mann_stereo_crop.tif
The image covers an area of 256 km^2. (16 km x 16 km)
Resolution is (20 m/pixel) right eye (80 m/pixel) left eye
Center latitude = 3 N
Center longitude = 240 W
I think that I already sent you the s#s for the images
======================================================================
>From all_hiips-request@noao.edu Sun May 24 16:35:24 1998
>From Moses Milazzo
To: Hiips
Subject: E14 Tyre mosaic update
*The previous files have been removed.*
******************************************************************************
Europa E14 Tyre Color Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E14_tyre_968.vic,
/home/ssi/review/E14_tyre_grn.vic,
/home/ssi/review/E14_tyre_vio.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E14_tyre_color.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E14_tyre_color.jpg,
E14_tyre_color.README (this file, on both Rushmore and pirl)
Description: Mosaic of E14 SSI hi-res with G7 low-res color
Projection: Orthographic
kilometers/pixel scale: .171
latitude range: 25.87 to 38.26
longitude range: 134.55 to 152.94
center latitude of projection: 1.94
center longitude of projection: 151
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 1715
number of samples: 2605
size: 13.4 megabytes (uncompressed)
SSI frame numbers: s0440953578.1 to s0440953700.1
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
Paul Geissler, geissler@pirl.lpl.arizona.edu
******************************************************************************
Europa E14 Tyre Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E14_tyre_clear.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E14_tyre_clear.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E14_tyre_clear.jpg,
E14_tyre_clear.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames
Projection: Orthographic
kilometers/pixel scale: .171
latitude range: 25.85 to 44.49
longitude range: 132.64 to 153.41
center latitude of projection: 1.94
center longitude of projection: 151
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 2276
number of samples: 2506
size: 5.7 megabytes (uncompressed)
SSI frame numbers: s0440953578.1 to s0440953700.1
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
======================================================================
>From all_hiips-request@noao.edu Fri May 22 12:45:37 1998
>From Moses
To: all_hiips@noao.edu
Subject: E12 Wedges mosaik
Europa Wedges E12_C3_context Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E12_Wedges_C3_context.vic
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E12_Wedges_C3_context.cub
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E12_Wedges_C3_context.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI E12 hi-res frames onto med-res frames
onto C3 med-res frames for regional context.
ProjectiOn: Orthographic
kilometers/pixel scale: .05
latitude range: -20.77 to -7.843
longitude range: -170.76 to -156.95
center latitude of projection: -7.08
center longitude of projection: -171.54
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 4171
number of samples: 5301
size: 22.1 megabytes (uncompressed)
SSI frame numbers: s0426272600.1 to s0426272660.1,
s0426272811.1 to s0426272846.2, s0426273826.1, s0368639400.9
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
Cynthia Phillips, phillips@pirl.lpl.arizona.edu
======================================================================
>From ssi_science-request@noao.edu Wed May 27 08:57:15 1998
To: ssi_science
Cc: Roland Wagner
Subject: manannan
Hi team,
we put on rushmore annother anaglyph of Manannan. (on Europa)
May be you like that too.
The directory is /home/ssi/review and the filename is
manannan_anaglyph.tif (format "TIFF" - Macintosh).
We are going to derive a digital terrain model from the stereo data
in the next days. This will be much complicated because of the oblique
viewing directions and different image scales (1:4) but we will try.
Regards
B. Giese, R. Wagner and G. Neukum
======================================================================
From: KLEM@dione.la.asu.edu
Date: Thu, 4 Jun 1998 12:37:17 -0600
To: ssi_science@noao.edu
Message-Id: <980604123717.b74@dione.la.asu.edu>
Subject: e12pwyll products on rushmore
Status: R
Greetings! I put 4 e12pwyll products on rushmore in home/ssi/review:
(1) e12pwyll.vic - this is the green-filter image of pwyll, with a slice of
the violet-filter image used to fill in the gap. It has been
orthographically reprojected.
(2) e12_2pwyll.vic - remember the image used on the front page of USA Today
back in March? Here it is with the Pass 2 data included. Essentially it
is the above image (e12pwyll.vic) with its location shown on the G2 Europa
globe.
(3a) e12pwyll.red
(3b) e12pwyll.grn
(3c) e12pwyll.blu -- these are the individual filters with data gaps, all
orthographically reprojected and coregistered. Fortunately, we have
data from all three filters across the crater, but that's about it.
A yellow patch in the center of the crater is interesting.
(4a) e12pwyll_prelim.red
(4b) e12pwyll_prelim.grn
(4c) e12pwill_prelim.blu -- these are a quick and somewhat effective attempt
to "fill the gaps" with data from the other filters, and enhancing the
contrast a bit. It won't win any prizes at the county fair, but you'll
get the idea.
-Klem
======================================================================
From: KLEM@dione.la.asu.edu
Date: Thu, 4 Jun 1998 13:50:47 -0600
To: ssi_science@noao.edu
Message-Id: <980604135047.c9e@dione.la.asu.edu>
Subject: e14wedges mosaic on rushmore
Status: R
A mosaic of the E14WEDGES data is available on rushmore in /home/ssi/review:
e14wedges.vic (processed by Wendy Schwarz and Klem)
*****************************************************************
****NOTE: NAME CHANGED TO FROM E14WEDGES.VIC TO ****
****E14WEDGES_2.VIC TO DISTINGUISH IT FROM A PREVIOUS PRODUCT****
*****************************************************************
The images have been orthographically reprojected to ~400 m/pixel (the
file is about 3.2 meg). The vertical gores are a result of the pointing
being off due to imaging in cruise mode. However, the numerous ridges,
wedges, fractures and chaos areas are clearly visible. The density of
wedges and dark bands increases as you move from right to left across the
scene. (The mosaic covers the area from about 16S to 40S lat, and 168W to
192W lon.) There appears to be a NW-SE trend of the large dark bands
that are prominent near the center of the mosaic. They may have formed by
a counter-clockwise rotation of the region to the left of these dark bands.
Although the chaos regions are overall younger than the wedges/bands, several
bands can be seen that have formed at the expense of chaos terrain, indicating
that wedge and chaos formation did overlap temporally.
Near the top of the mosaic is a large dark region that is relatively
young which contains a "mound" of material that may represent upwarping
and/or extrusion. A high density of bright fractures/ridges are apparent
proximal to the dark spot, which makes it look somewhat like Magellan data!
Several 1-2 km craters can be found in the mosaic, as well as the larger
crater commented on by Jeff Moore (and others).
There's lots of other cool stuff in here. We hope this whets your
appetites!
ASU Crew
======================================================================
>From Thomas.Roatsch@dlr.de Fri Jun 5 07:32:14 1998
To: belton@jupiter.tuc.noao.edu
Cc: Eric.DeJong@jpl.nasa.gov, Elizabeth Alvarez del Castillo ,
Tilmann Denk , Bernd Giese
Subject: Re: Special product for R. Mitchell and J.Erickson
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Mike,
I just talked with Gerhard and he agreed to send you the required
products. Unfortunately, I could not meet him earlier.
Bernd Giese created the DTM and the ortho photo.
You can find both on rushmore in ~tyr/mitchell
Bernd also wrote the follwing note:
The DTM should not be used for scientific purposes since a lot of
gaps, even large ones, were filled by interpolation.
Enjoy
Thomas
PS: I will fly to Tucson tomorrow to attend a Cassini meeting, I will try
to say "hallo" to you and Liz on Tuesday.
======================================================================
>From ssi_science-request@noao.edu Mon Jun 8 15:27:29 1998
>From ASU Crew
To: ssi_science@noao.edu
Subject: e14 mosaics on rushmore
Two E14 mosaics have been put on rushmore in /home/ssi/review:
e14trpbnd.vic - a 75 m/pixel mosaic of an offset in a tripleband seen
in the G1 Europa mosaic. Unfortunately, several gores occur in this
mosaic near the location of the offset. At first glance the dark
stuff surrounding the ridge appears to be offset, while the ridge
is continuous. However, upon closer inspection, there are several
ridges that appear to be superposed, with the youngest ridge being
the only one that connects across the offset. So either (1) the
early ridges/dark material formed follwed by offset (with the shear-
zone being overprinted) and formation of a younger ridge after the
offset; or (2) all of the ridges are essentially contemporaneous without
shearing, and the surrounding dark material was not produced by the
ridges that linked both triple bands.
I (klem) prefer option number one, but others feel the ridges "felt"
each other during formation, producing the current orientation (because
there is not an obvious shear zone). What thoughts do others have
on this feature?
This mosaic also includes the unusual feature commented on by Mike
Belton -- the crater. Mike, you're right that it sure appears to
stand out like a massif! We've been batting around the interpretation of
that feature, and everyone is convinced....about their
own interpretation!! So if it is a crater, (which makes sense from
the viewing geometry), it is unusual in that it apparently lacks
ejecta and secondaries (if it is impact in origin) rather than collpse
or some other origin. There are several dark features indicating mass wasting
of the slopes, not seen in any other crater so far. However, these dark
features could be interpreted as debris piles at the floor of a crater,
or shoots from the top of a massif, which is the first-sight impression
when you compare it with the surrounding features. Perhaps this is
a "cilix-like" phenomenon -- seen as a crater in voyager data, and as a
massif in G1 Galileo data.
(Processing by Patricio Figueredo and Klem)
The second mosaic is e14tyre_clear.cub (an ISIS file) which has an
accompanying text file: e14tyre_clear.readme
e14tyre_clear.readme
***Europa E14 Mosaic of Tyre Macula***
Filename: e14tyre_clear.cub
Projection: Orthographic
Scale: 0.170 km/pixel
Latitude range: 25.5-44
Longitude range: 135-154
Center latitude: 2
Center longitude: 151
Bit type: 8 (byte)
Lines, Samples: 2494,2686
E14 Galileo frames: s0440953578.2,s0440953600.2,s0440953613.2,
s0440953626.1,s0440953627.2,s0440953639.1,s0440953640.2,s0440953652.1,
s0440953653.3,s0440953665.1,s0440953666.2,s0440953678.1,s0440953679.2,
s0440953700.1,s0440953701.2
Image processor: Frank Chuang (chuang@asu.edu)
Processing software used: ISIS
Description
This mosaic was created with the most recent pass2 data
of the 14ESTYREHR01 (Tyre Macula) observation collected during the
E14 orbit. All images in this mosaic were taken with the clear filter.
A color version of this observation merged with G7 data is available
from Moses Milazzo (University of Arizona). Please contact him at
mmilazzo@lpl.arizona.edu. Note that this mosaic is not tied to a firm
control base such as Voyager. North is to the top of the image.
General observations
* Numerous small secondaries can be seen around the periphery of Tyre
of which many are radial to the center.
* The center of Tyre is fairly smooth and lacks a prominent bowl
or central peak
* A minimum of 7 concentric rings are visible, maybe more.
(See earlier email by Steve Kadel)
* Terrain to the east of Tyre is rough and undulatory with numerous domes,
depressions, and areas of "chaos terrain".
* Note the gray band located at 950,2345 (line, samp) where the underlying
topography is clearly visible.
* A number of tilted blocks (e.g. 879,2033) and small hills (e.g. 407,1811)
are scattered in the eastern half of the mosaic. These features are good
candidates for shadow measurements.
======================================================================
>From all_hiips-request@noao.edu Mon Jun 8 18:23:22 1998
>From Moses Milazzo
To: Hiips
Subject: E14 Ganymede global color mosaic
Ganymede Global color Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E14_ganymede_968.vic,
/home/ssi/review/E14_ganymede_grn.vic,
/home/ssi/review/E14_ganymede_vio.vic,
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/E14_ganymede_color.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E14_ganymede_color.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI med-res frames.
Projection: Orthographic
kilometers/pixel scale: 9.3
latitude range: -89.8 to 90
longitude range: -234.3 to 47
center latitude of projection: .2
center longitude of projection: -54.3
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 566
number of samples: 566
size: 1.0 megabytes (uncompressed)
SSI frame numbers: s0441013078.1 to s0441013169.1
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
======================================================================
>From all_hiips-request@noao.edu Tue Jun 9 16:34:03 1998
>From Moses Milazzo
To: Hiips
Subject: E14 Dark Spot mosaic
Europa E14 Dark Spot Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E14_darkspot.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E14_darkspot.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E14_darkspot.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res frames
Projection: Orthographic
kilometers/pixel scale: .02
latitude range: -1.17 to 1.56
longitude range: -135.84 to -133.1
center latitude of projection: 11.85
center longitude of projection: -117
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 3873
number of samples: 3569
size: 13.9 megabytes (uncompressed)
SSI frame numbers: s0440948778.1 to s0440948852.3
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
======================================================================
>From phillips@lpl.arizona.edu
To: ssi_science@noao.edu
Subject: E15 color Cilix images
I've put a quick color version of the new E15 Cilix images on
rushmore, in /home/ssi/review -
e15cilix1.cub - 16-bit isis cube, 3-band (1 micron, green, violet)
e15cilix1.tif - tiff version of the same image, in color.
These are orthographically reprojected and coregistered...I'll do a
better version with the noise cleaned up when we get those
gaps filled (if we do!)
======================================================================
>From all_hiips-request@noao.edu Wed Jun 10 12:25:51 1998
>From Moses Milazzo
To: Hiips
Subject: E14 Dark Spot 4-band mosaic
Europa E14 Dark Spot Color Mosaic
VICAR format: on Rushmore.jpl.nasa.gov
/home/ssi/review/E14_darkspot_red.vic,
/home/ssi/review/E14_darkspot_968.vic,
/home/ssi/review/E14_darkspot_grn.vic,
/home/ssi/review/E14_darkspot_vio.vic,
(Warning, due to limited space, images deleted after two weeks.)
ISIS format: on pirl.lpl.arizona.edu
/galileo3/mosaics/Europa/E14_darkspot_color.cub,
(contact joep@pirl.lpl.arizona.edu if you need an account on pirl.)
E14_darkspot.README (this file, on both Rushmore and pirl)
Description: Mosaic of SSI hi-res color frames
Projection: Orthographic
kilometers/pixel scale: .06
latitude range: -.85 to .42
longitude range: -135.01 to -133.3
center latitude of projection: 9.8
center longitude of projection: -167
(center coordinates close to GLL sub-spacecraft coordinates,
to preserve correct 3D perspective of topography).
bit type: 8 (byte)
number of lines: 513
number of samples: 615
size: 1.3 megabytes (uncompressed)
SSI frame numbers: s0440949600.1 to s0440949635.5
Image Processing done by: Moses Milazzo, mmilazzo@pirl.lpl.arizona.edu
>From all_hiips-request@noao.edu Wed Jun 10 12:35:23 1998
Subject: Bands for Dark Spot
The Dark Spot isis cub (E14_darkspot_color.cub) has the following bands:
band 1: red
band 2: grn
band 3: vio
band 4: 968
======================================================================
>From ssi_science-request@noao.edu Wed Jun 10 16:07:33 1998
>From Fagents, ASU crew
To: ssi_science@noao.edu
Subject: E15 mosaics on Rushmore
We have placed the following files in /home/ssi/review:
E15regmap01_pass1.vic (14.6 Mb)
A preliminary mosaic of the pass 1 data. This was orthographically reprojected
to a scale of 200 m/pxl, high-pass filtered and given a linear stretch.
Processed by Schwarz, Fagents, Klem.
cilix.red
cilix.grn
cilix.blu (5.87 Mb each)
These files were orthographically reprojected to 40 m/pxl, with a Hapke
photometric correction, and some of the radiation hits removed with a
despike on the 968 filter. Processed by Moreau, Klem, Moncrief.
Observations to follow....
======================================================================
>From all_hiips-request@noao.edu Thu Jun 11 14:08:46 1998
>From Moses Milazzo
To: Hiips
Subject: Preliminary E15 Regmap
I have put a preliminary mosaic of the E15 clear regmap and a color
composite of the same with Paul Geissler's G1 Science figure.
on rushmore::/home/ssi/review
E15_G1_vio.vic
E15_G1_grn.vic
E15_G1_red.vic
E15_G1_756.vic
E15_G1_889.vic
E15_G1_968.vic
E15_regmap.vic (clear filter)
on pirl::/galileo3/review/Europa
E15_G1_regmap.cub
band1: vio
band2: grn
band3: red
band4: 756
band5: 889
band6: 968
E15_regmap band1: clear
======================================================================
>From ssi_science-request@noao.edu Thu Jun 11 17:19:05 1998
>From ASU Crew
Subject: E15 Photom 01
To: ssi_science@noao.edu
We have placed the following file in /home/ssi/review:
e15photom_context.tiff ( 0.7 Mb)
Preliminary processing of pass 1 violet filter, with G7 coverage used as
context. This image was high-pass filtered and given a linear stretch.
Processed by Kerr, Klem.
This frame was compressed at a ratio of 9:1 to determine the location of
features within the frame and the placement of cut out windows on pass 2.
Observations:
The E15 frame contains some coverage of a new section as well as coverage of
the G7 photometry observation of Europa at about 260 m/pixel resolution-- see
context image. The upper right-hand corner of s0449962413.1 shows a set of
three doublet ridges running north-south with an almost equal spacing between
each set. Also noted is a circular area which appears to have a tilted block
in its center.
Another item of interest is the occurrence of dark material in the grooves
trending south east from the large dark spot. This also occurs along the lower
east-west ridge system directly above the spot. Of particular interest is the
doublet ridge that runs north-south across this area. The young
south-southeast trending crosscutting ridge appears to contain none of the
darker materials that surround the other ridge-system and the spot.
======================================================================
>From ssi_science-request@noao.edu Fri Jun 12 13:20:22 1998
To: ssi_science@noao.edu
Subject: E15 regmap01 context image
The following has been placed on Rushmore in /home/ssi/review:
e15g1regmap01_pass1_cxt.vic (11.7 Mb)
This is a context image showing the location of the regmap01
observation (E15regmap01_pass1.vic, posted 6/10) in the
4-frame G1 GLOBAL01 coverage.
Processed by Fagents/Schwarz/Klem.
Cheers,
ASU crew.
======================================================================
>From ssi_science-request@noao.edu Sun Jun 14 09:03:14 1998
To: ssi_science@noao.edu
Subject: preliminary stereo near Cilix
I have made an anaglyph of the preliminary stereo coverage
of the Cilix region. The image is located on rushmore in
/home/ssi/review/e15_lpl_cilix_stereo1.tif
Red corresponds to the left eye and image s0449965000.1 (~110 m/pixel)
Blue coresponds to the right eye and images s0449967446, 449, 453, and 488
(~70 m/pixel).
The individual stero images are in:
e15_lpl_cilix_stereo1_left.tif
e15_lpl_cilix_stereo1_right.tif
These images are the same size and just need be printed out
to be viewed under a stereoscope.
All images were reprojected in isis with
center latitude = 9.23
center longitude = 183.74
resolution 70 m/pixel
enjoy,
Greg
======================================================================