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Phoenix PDS Releases
fredk
post Dec 21 2008, 03:10 AM
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QUOTE (peter59 @ Dec 20 2008, 07:28 PM) *
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:
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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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djellison
post Dec 22 2008, 05:34 PM
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Sol 2 mosaic - Just R A,B,C - very red. I think I prefer R ABC x R1.
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ugordan
post Dec 22 2008, 05:42 PM
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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:

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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):

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Looks a bit better, doesn't it?


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brellis
post Dec 22 2008, 07:33 PM
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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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Stu
post Dec 22 2008, 08:23 PM
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Hmmm, I kind of like the really red one better... cool.gif


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djellison
post Dec 22 2008, 10:39 PM
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I love data. Sols 15 and 16 chunks of the Peter Pan
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OKB001
post Dec 22 2008, 10:54 PM
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I love that you love data smile.gif Please keep the love flowing wink.gif
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djellison
post Dec 22 2008, 11:47 PM
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And the Sol 30 Solstice image - not best pleased with colour on this one. I'll leave processing the full peter-pan to James wink.gif
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Deimos
post Dec 23 2008, 01:41 AM
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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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djellison
post Dec 23 2008, 10:47 AM
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QUOTE (Deimos @ Dec 23 2008, 01:41 AM) *
I like the ones where the filter color-space is mapped to sRGB,


That's where Dan Crotty comes in - he's good at that smile.gif

Dan - get to it !

Doug
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slinted
post Dec 23 2008, 02:58 PM
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Working on it smile.gif I should have something to share by next week.
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peter59
post Dec 25 2008, 11:42 AM
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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?
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Map
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MRO - PSP_007642_2480, PSP_006996_2480, PSP_007497_2480
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left hill - PSP_006996_2480, right hill - PSP_006996_2480
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Doc
post Dec 25 2008, 12:03 PM
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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 smile.gif


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peter59
post Dec 25 2008, 06:07 PM
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Now I have no doubt as to the identification of the image PSP_006996_2480.
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Other photo (PSP_007642_2480) taken in early spring or late autumn presents the hill with frost in the bottom of the slope.
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I regret that Phoenix could not be active at a time when frost appears.


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fredk
post Dec 25 2008, 06:08 PM
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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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