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Mercury mosaics from January 2008 Flyby
ugordan
post Jul 14 2008, 07:52 PM
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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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ugordan
post Jul 15 2008, 06:21 PM
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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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volcanopele
post Jul 15 2008, 06:36 PM
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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.


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elakdawalla
post Jul 15 2008, 06:43 PM
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QUOTE (ugordan @ Jul 15 2008, 10:21 AM) *
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


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ugordan
post Jul 15 2008, 06:53 PM
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QUOTE (volcanopele @ Jul 15 2008, 08:36 PM) *
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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volcanopele
post Jul 15 2008, 07:08 PM
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Mainly because I'm lazy laugh.gif 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.


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volcanopele
post Jul 15 2008, 07:10 PM
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I might be persuaded to give the WAC color mosaic a try, but I can't promise anything.


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Bjorn Jonsson
post Jul 17 2008, 01:07 AM
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QUOTE (ugordan @ Jul 15 2008, 06:21 PM) *
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 wink.gif. 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 wink.gif.

Back to downloading.

Now if only there was such a thing as calibrated Cassini volumes...

QUOTE (ugordan @ Jul 15 2008, 06:53 PM) *
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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elakdawalla
post Jul 17 2008, 01:57 AM
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Hi Bjorn, if you're looking for encouragement, I'll speak up to say "Yes, please!" biggrin.gif

--Emily


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volcanopele
post Jul 17 2008, 02:29 AM
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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.


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ugordan
post Jul 17 2008, 07:37 AM
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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. wink.gif


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djellison
post Jul 17 2008, 08:23 AM
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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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ugordan
post Jul 20 2008, 06:28 PM
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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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nprev
post Jul 20 2008, 06:36 PM
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ohmy.gif ....good grief, that's just stunning. I could spend hours looking at this. Thanks for the gift, G, sincerely. smile.gif


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ilbasso
post Jul 20 2008, 07:16 PM
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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.


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