Mercury mosaics from January 2008 Flyby |
Mercury mosaics from January 2008 Flyby |
Jul 12 2008, 11:50 PM
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
The raw data from MESSENGER's January 14, 2008 flyby of the planet Mercury are now online on NASA Planetary Data Service's website:
http://pds-imaging.jpl.nasa.gov/data/messe...grmds_1001_new/ As such, I am proud to present a series of mosaics I have created using these raw images. These use the mosaic designs shown on the MESSENGER project's Mercury Flyby 1 Visualization Tool webpage. These mosaics were created in either Photoshop CS3 (using the Photomerge tool) or PTGui Pro (particularly for the two MASSIVE mosaics). Keep in mind that these mosaics are quite large in most cases, and it may be better just to right-click and save them to your hard drive to view them separately, rather than viewing them in your browser. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 17 2008, 08:23 AM
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
Some words on img2png and the MDIS imagery would be good- - which tags we should be using for calibrated results.
D |
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Jul 24 2008, 07:28 PM
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IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Some words on img2png and the MDIS imagery would be good- - which tags we should be using for calibrated results. I just finished a new version of IMG2PNG that can properly read the calibrated Messenger image files. However, it can't calibrate the raw images (the mdis volume) even though it reads them - I didn't see any need for this since calibrated images are available (the msgrmds_2001 volume). The new version is available here. Further information on IMG2PNG is available here. The only problem is, I don't trust built-in geometry one iota. I guess if the images are high res enough, it doesn't matter, but with global to regional scale mosaics, it can be a problem. I assume you are referring to the viewing geometry information that's usually present in the IMG, LBL or index files. Yes, this is an extremely annoying problem. I'm making DEMs of all of Saturn's icy satellites and about 90% of the time the pointing information isn't accurate enough so I need to 'reverse engineer' it. In contrast, the spacecraft's location seems accurate. It's also frustrating that for any spacecraft, as far as I know updated pointing information usually isn't made available if/when it is determined. Remarkably, the pointing information for the Galileo images was usually pretty accurate though. So my software for reprojecting images wouldn't be useful unless potential users were willing to reverse engineer the viewing geometry themselves when the results look bad (this might turn into something useful - exchanging updated pointing info...). |
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