Voyager and Galileo Images of Ganymede, The Ganymede images and mosaics thread |
Voyager and Galileo Images of Ganymede, The Ganymede images and mosaics thread |
May 18 2007, 09:43 PM
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#31
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IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
I've been processing some of the high resolution Galileo Ganymede images recently. As far as I know the two mosaics below have not appeared at the official websites (at least not in this form) so in a sense they are 'new'.
The first one was obtained during the G1 flyby in 1996. It covers a part of Memphis Facula which is centered at roughly 15°N, 132°W. The images were obtained at a distance of approximately 5000 km from Ganymede's center. The second one was obtained during the G28 flyby in May 2000. It is centered near 14.5°S, 319.7°W. The images making up the mosaic were obtained at a distance of roughly 4500 km from Ganymede's center. I will probably post more Ganymede mosaics later this month or next month. |
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Oct 19 2010, 06:26 PM
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#32
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Since the scripts are just text files and shouldn't take up too much space, I say post 'em. I have fantasies that I'll get back into using ISIS for image processing but I'll have to get myself a Mac first...
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Oct 19 2010, 07:10 PM
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#33
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Junior Member Group: Members Posts: 74 Joined: 9-October 10 From: Victoria, BC Member No.: 5483 |
Since the scripts are just text files and shouldn't take up too much space, I say post 'em. I have fantasies that I'll get back into using ISIS for image processing but I'll have to get myself a Mac first... Yeah, me too (well, the getting back into ISIS part, not the Mac part!). Unfortunately I then remember how horribly painful installing Linux and trying to get ISIS to work with it is... I had a quick look for the (old) versions of Linux that ISIS claims to be compatible with and I can't even find the installers for those anywhere anymore (and it sounds like it has problems running in the newest versions of SuSE). So, the attached zipfile contains the script for the mosaic I posted. The "colourRAND.txt" in the zip file is the script itself - I'd advise that you have a look through it and check that it's all good, as I'm not sure if it's still compatible with the current version of ISIS. I also do some housekeeping in the script (deleting files) so make sure that's OK too. The zipfile also contains three input.txt files which are used in the "noseam" step of the processing. And there's also the RANDganymede.rmb file, which is a SPICE file that I got from Tim Colvin at RAND used in the "spicelab" step - I'm not sure if this is still necessary, but at the time it was better than the SPICE data in ISIS. The script will take the original Voyager 2 IMQ format images, turn them into .cub format, update the labels with the SPICE data, remove the reseau marks (lvl 1), reproject them to sinusoidal (lvl 2) centred on 170° longitude with a resolution of 2.3 km, run noseam to make global orange, blue, and violet mosaics, output raw files of the mosaics, and then make global mosaics centred on the leading, trailing, and antijovian hemispheres. You'll need the following Voyager images, available from http://pds-rings.seti.org/vol/VG_0025/GANYMEDE/C2063XXX/ : c2063105.imq c2063113.imq c2063121.imq c2063123.imq c2063131.imq c2063101.imq c2063109.imq c2063111.imq c2063119.imq c2063127.imq c2063129.imq c2063059.imq c2063107.imq c2063115.imq c2063117.imq c2063125.imq c2063133.imq I'd be interested to see if this works on other peoples' machines (EDIT: Oh yeah, and make sure all the imqs and the text files are in the same folder, and that you are running the script from the same folder too).
Attached File(s)
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