Mercury mosaics from January 2008 Flyby |
Mercury mosaics from January 2008 Flyby |
Jul 14 2008, 07:52 PM
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#16
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Approach wide-angle movie:
54 binned RGB sets total, from 2008-01-14 00:05:01 UTC (400 000 km range) to 2008-01-14 17:43:52 UTC (29 500 km range). -------------------- |
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Jul 15 2008, 06:21 PM
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#17
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Sigh.
(no, this ain't yet another one of my postage-stamp sized composites) Just when I was finally able to do all calibration steps, a calibrated data volume (!) appears at the PDS, containing both the radiometrically calibrated and I/F calibrated data. The old directory VP posted in the first post was renamed to http://pds-imaging.jpl.nasa.gov/data/messe...s_1001_new_old/. There's also one more dir: http://pds-imaging.jpl.nasa.gov/data/messenger/msgrmds_1001/, which I suspect is the same as the former one. Calibrated data, people. Dig in! -------------------- |
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Jul 15 2008, 06:36 PM
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#18
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
meh, ISIS3 worked just fine for me. Though I guess it helps that Mercury isn't as bland as Venus, so some of calibration issues you mentioned don't show up in the MESSENGER images.
-------------------- &@^^!% 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 15 2008, 06:43 PM
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#19
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Calibrated data, people. Dig in! Yummy. Now I'm glad I didn't find the time to play with this data set before! I'm updating my Cassini pages first, then I'll get back to this... --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Jul 15 2008, 06:53 PM
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#20
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
meh, ISIS3 worked just fine for me. Though I guess it helps that Mercury isn't as bland as Venus, so some of calibration issues you mentioned don't show up in the MESSENGER images. I meant to ask this earlier: if you have access to ISIS, how come you didn't geometrically reproject the mosaics? I'd die (not literally, though) for a piece of software that can do that, I don't have the knowledge or will to be reinventing the wheel and writing my own reprojection software. BTW, those were actually Mercury wide-angle departure frames, not Venus where I noticed calibration 'issues'. I'll be sure to check the calibrated products to see if the same thing's present there. -------------------- |
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Jul 15 2008, 07:08 PM
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#21
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Mainly because I'm lazy Seriously, it takes a lot longer to geometrically correct these images than it is to let a program do all the transforms automatically. With Cassini, I get paid to spend the time to geometrically correct the images, so I'm a lot more willing to spend that extra time...
It also helps that ISIS doesn't have the info on the Mercury flyby geometry and I am not as familiar with ISIS3 to know how to fix that. I could do that with ISIS2 if that version supported MESSENGER. -------------------- &@^^!% 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 15 2008, 07:10 PM
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#22
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
I might be persuaded to give the WAC color mosaic a try, but I can't promise anything.
-------------------- &@^^!% 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, 01:07 AM
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#23
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IMG to PNG GOD Group: Moderator Posts: 2250 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Sigh. (no, this ain't yet another one of my postage-stamp sized composites) Just when I was finally able to do all calibration steps, a calibrated data volume (!) appears at the PDS, containing both the radiometrically calibrated and I/F calibrated data. The old directory VP posted in the first post was renamed to http://pds-imaging.jpl.nasa.gov/data/messe...s_1001_new_old/. There's also one more dir: http://pds-imaging.jpl.nasa.gov/data/messenger/msgrmds_1001/, which I suspect is the same as the former one. Calibrated data, people. Dig in! Looks like I really should check out UMSF more often than I do . Having spent some time figuring out that http://pds-imaging.jpl.nasa.gov/data/messenger/msgrmds_2001/ is the volume I want (reason: it's calibrated data) I see I could have saved some time by reading this thread earlier . Back to downloading. Now if only there was such a thing as calibrated Cassini volumes... I meant to ask this earlier: if you have access to ISIS, how come you didn't geometrically reproject the mosaics? I'd die (not literally, though) for a piece of software that can do that, I don't have the knowledge or will to be reinventing the wheel and writing my own reprojection software. My software can do this and in retrospect this was a fairly easy feature to add - in general, considerably easier than e.g. the the Galileo and Cassini calibration stuff (but very different of course). Maybe I should clean it up a bit and release it... |
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Jul 17 2008, 01:57 AM
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#24
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Hi Bjorn, if you're looking for encouragement, I'll speak up to say "Yes, please!"
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Jul 17 2008, 02:29 AM
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#25
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
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.
-------------------- &@^^!% 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, 07:37 AM
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#26
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Bjorn, sign me up as an interested party as well! As far as I'm concerned, it doesn't even have to be 'cleaned-up', I'm used to rudimentary interfaces when dealing with my own software anyway.
-------------------- |
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Jul 17 2008, 08:23 AM
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#27
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Founder Group: Chairman Posts: 14432 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 20 2008, 06:28 PM
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#28
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
A 5000x5000 color mosaic made from the NAC departure mosaic #4 (30-odd frames) and colorized using the WAC global color view. Non-gamma corrected so the contrast and colors are enhanced.
Click image for full resolution view (9 megabytes). -------------------- |
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Jul 20 2008, 06:36 PM
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#29
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
....good grief, that's just stunning. I could spend hours looking at this. Thanks for the gift, G, sincerely.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jul 20 2008, 07:16 PM
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#30
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Member Group: Members Posts: 753 Joined: 23-October 04 From: Greensboro, NC USA Member No.: 103 |
Wow, that's almost as big as the planet itself! Incredible detail. You can even see the rim in profile of a crater on the limb at 4:00. The detail at the terminator is mesmerizing.
-------------------- Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com |
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