Phoenix PDS Releases |
Phoenix PDS Releases |
Dec 21 2008, 03:10 AM
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#16
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
I like to view the horizon. Me too. It sure is good to see cleaner versions of these images. Here's one of my favourite views: And in this view I thought there was detail visible on the distant hills from the jpegs. Now there's no doubt that those details are real: |
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Dec 22 2008, 05:34 PM
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#17
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Dec 22 2008, 05:42 PM
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#18
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Wow, that is red. I think it has to do with the fact the data is linear, not gamma-corrected for computer screens. It looks less garish with a correction, but could still probably be tweaked to fudge filter bandpasses better into sRGB colorspace:
At least the color chips look OK! The RB filter is furthest from the sRGB colorspace so mixing a bit of red into it gives this (80% green, 20% red): Looks a bit better, doesn't it? -------------------- |
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Dec 22 2008, 07:33 PM
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#19
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Member Group: Members Posts: 754 Joined: 9-February 07 Member No.: 1700 |
What a treat! My jaw drops all over again. Thanks to all for sharing your work and comments on the images. It really helps me get a feel for what it would look like for a person standing there on Mars.
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Dec 22 2008, 08:23 PM
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#20
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Hmmm, I kind of like the really red one better...
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Dec 22 2008, 10:39 PM
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#21
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Dec 22 2008, 10:54 PM
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#22
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Junior Member Group: Members Posts: 21 Joined: 15-December 08 Member No.: 4509 |
I love that you love data Please keep the love flowing
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Dec 22 2008, 11:47 PM
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#23
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Dec 23 2008, 01:41 AM
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#24
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Martian Photographer Group: Members Posts: 353 Joined: 3-March 05 Member No.: 183 |
This is fun.
To answer an earlier question, the phxssi_0xxx should be raw DN, uncorrected for anything other than decommutation (not packets, not compressed anymore). The phxssi_1xxx is processed using JPL's version of the pre-landing calibration. The phxsci_0xxx should be the best for all cameras. The difference for SSI should be relatively small (better bias correction, better flat field, different smear removal for certain binned images). Ironically, half my software choked on the data for this release, but is mostly back up. So if there are cases where phxssi_1xxx is better than phxsci_0xxx, I'd appreciate examples. Personally, I like the ones where the filter color-space is mapped to sRGB, rather than straight substitution. YMMV. Cheers. |
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Dec 23 2008, 10:47 AM
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#25
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Dec 23 2008, 02:58 PM
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#26
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Member Group: Admin Posts: 468 Joined: 11-February 04 From: USA Member No.: 21 |
Working on it I should have something to share by next week.
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Dec 25 2008, 11:42 AM
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#27
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Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
These distant hills fascinated me. I tried to identify them on Mars Reconnaissance Orbiter images. I'm not sure if my identification is correct. What do you think?
Map MRO - PSP_007642_2480, PSP_006996_2480, PSP_007497_2480 left hill - PSP_006996_2480, right hill - PSP_006996_2480 -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Dec 25 2008, 12:03 PM
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#28
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Member Group: Members Posts: 276 Joined: 11-December 07 From: Dar es Salaam, Tanzania Member No.: 3978 |
I thought those hills correspond to the Heimdell crater passed by Phoenix during EDL phase. Now I'm not so sure!
BTW all of Phx's data is now available. Now its time to play around with the OM pics -------------------- |
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Dec 25 2008, 06:07 PM
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#29
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Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
Now I have no doubt as to the identification of the image PSP_006996_2480.
Other photo (PSP_007642_2480) taken in early spring or late autumn presents the hill with frost in the bottom of the slope. I regret that Phoenix could not be active at a time when frost appears. -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Dec 25 2008, 06:08 PM
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#30
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
Peter, your identification agrees with that of Phil Stooke, and that's good enough for me! (Those two hills are labelled A and B in Phil's map.)
We can see a bit of the outskirts of Heimdall crater rising up towards the NE. |
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