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Posted by: peter59 Dec 23 2009, 06:42 PM

I'm currently working on allowing access to another forgotten dataset. This dataset consists of three CD volumes (VGR_2101, VGR_2102 and VGR_2103). The input tapes to this CD volume set consist of the Voyager mosaics of all the satellites of Jupiter. The images were originally intended for use in an atlas of the Voyager satellites. This data set was created at JPL as part of its Science Digital Data Preservation Task (SDDPT). This dataset like many others SDDPT data sets is not readily usable, as they represent bit copies of old data tapes and do not contain user documentation.

Here is a sample of what is contained in this data set:

Image GS10906

Posted by: elakdawalla Dec 23 2009, 07:05 PM

Peter, you are the unsung hero of the oldest data sets. Thanks for all the work you do! I can't wait to see more of these, though I wonder how they'll compare to what DrShank will shortly be publishing in his atlas.

(By the way, I split this to a new topic with a more useful title, this is worthy of its own thread.)

--Emily

Posted by: peter59 Dec 24 2009, 02:15 PM

Image GS_0105_001 (half size scale)

CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0105 ALBEDO MOSAIC CALLISTO

Merry Christmas.

Posted by: Decepticon Dec 25 2009, 05:09 AM

WOW! Great work Peter!

Posted by: nprev Dec 25 2009, 06:35 AM

Great work, Peter, and if this works correctly:

Wesołych Świąt!

Posted by: peter59 Dec 29 2009, 07:28 PM

Image GS_0154_002 (half size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0154 IO COLOR MOSAICS

HEADER:
LABEL GENERATED BY MAPLAB SUBROUTINE
RADII= 1816.0 1816.0 1816.0 LORANGLE= 0.00
SIMPLE CYLINDRICAL PROJECTION
AT LINE= 2300.00 SAMPLE= 1000.00 LATI= 0.000 LONG= 0.000 W
SCALE AT EQUATOR = 26.413 PXLS/DEG OR 1.200 KM/PXL

Posted by: tedstryk Dec 29 2009, 10:33 PM

Neat stuff! I can't wait to see all of it. Are you displaying the mosaics at reduced resolution or were they produced at half-size?

Posted by: peter59 Dec 30 2009, 11:41 AM

Original images after saving in JPG format are typically larger than 1M, so I'm forced to reduce them by 50 percent.

Posted by: tedstryk Dec 30 2009, 04:33 PM

Thanks! The way you worded it earlier, I couldn't tell if you had reduced them for this reason or if they were reduced on the CD-ROM.

Posted by: peter59 Dec 30 2009, 05:37 PM

Image GS_0112_001 (full size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0112 IO COLOR PROJECTIONS 16382XX FULL

LABEL GENERATED BY MAPLAB SUBROUTINE
RADII= 1816.0 1816.0 1816.0 LORANGLE 0.00
POLAR STEREOGRAPHIC PROJECTION
AT PROJ. CENTER L= 1761.0 S= 960.0 LAT=-90.000 LONG= 0.000 W
SCALE= 3.000 KM/PXL NORTH= DEG CLOCKWISE FROM UP
JAM.V1364.VIOLET

Image GS_0112_002 (full size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0112 IO COLOR PROJECTIONS 16382XX FULL

LABEL GENERATED BY MAPLAB SUBROUTINE
RADII= 1816.0 1816.0 1816.0 LORANGLE 0.00
POLAR STEREOGRAPHIC PROJECTION
AT PROJ. CENTER L= 1761.0 S= 960.0 LAT=-90.000 LONG= 0.000 W
SCALE= 3.000 KM/PXL NORTH= DEG CLOCKWISE FROM UP
JAM.V1364.BLUE

Posted by: peter59 Jan 3 2010, 08:52 PM

Image GS_0192_001 (1/4 size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2102 GS_0192 CALLISTO HI RES MOSAIC UNBLOCKED

EXP 00720.0 MSEC
FILT 0 CLEAR
SIMPLE CYLINDRICAL PROJECTION
LATI= 0.000 LONG= 0.000 W
SCALE AT EQUATOR= 34.907 PXLS/DEG OR 1.200 KM/PXL

Posted by: peter59 Jan 4 2010, 05:56 PM

Image GS_0143_001 (1/2 size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0143 GANYMEDE MOSAIC VIOLET VGR2

FILT 1 VIOLET
SIMPLE CYLINDRICAL PROJECTION
SCALE AT EQUATOR = 22.960 PXLS/DEG OR 2.000 KM/PXL

Posted by: peter59 Jan 6 2010, 06:42 PM

Image GS_0151_001 (half size scale)
CD VOLUME TAPE DESCRIPTION
VGR_2101 GS_0151 CALLISTO HI PASS FILTER MOSAIC

EXP 00360.0 MSEC
FILT 0 CLEAR
VEVERKA PHOTOMETRIC FUNCTION 0.700+-0.0027A+0.300EXP-0.85A
SIMPLE CYLINDRICAL PROJECTION
SCALE AT EQUATOR = 20.944 PXLS/DEG OR 2.000 KM/PXL