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Spirit from HiRISE on Home Plate
slinted
post Nov 25 2007, 07:15 PM
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Not to sidetrack a somewhat sidetracked thread...but... (Edit: Yea! new thread)
Here's a sub-frame of the new color image of the Columbia Hills, made from the Red and Blue filters with a synth green and a bit of contrast tweaking.

Full Res (5 meg)
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kenny
post Nov 27 2007, 09:53 AM
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HiRISE took this new color pic of Spirit on Home Plate on Sept 27

Spirit from HIRISE

Here's the press release re-posted ....

SpaceRef quotes Spirit photo story

Here's the orginal source....

Univ Arizona HiRISE Spirit
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djellison
post Nov 27 2007, 10:00 AM
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You missed out the only real link that matters smile.gif

http://hirise.lpl.arizona.edu/PSP_005456_1650
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kenny
post Nov 27 2007, 10:02 AM
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[quote name='djellison' date='Nov 27 2007, 10:00 AM' post='104651']
You missed out the only real link that matters smile.gif

I was just adding it when you spotted my slip with such alacrity.... smile.gif
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ugordan
post Nov 27 2007, 10:04 AM
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Wow, that's a rather noisy image there... huh.gif


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elakdawalla
post Nov 27 2007, 06:00 PM
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Yeah, the image underimpressed me a little bit too; I like Slinted's version much better than the one on the UA website. Does it appear more "noisy" in part because the Sun is rather high in this shot, so there is less shadow and hence less contrast?

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tuvas
post Nov 27 2007, 11:40 PM
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No idea why it might be, perhaps it's just the fact that we're getting more to the Martian winter? I checked the image parameters and nothing is unusual, so, well, I don't know what it might be.
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tedstryk
post Nov 28 2007, 12:13 AM
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QUOTE (tuvas @ Nov 27 2007, 11:40 PM) *
No idea why it might be, perhaps it's just the fact that we're getting more to the Martian winter? I checked the image parameters and nothing is unusual, so, well, I don't know what it might be.



If the atmosphere was hazy, that could also be a factor. Also, with the color being blue-green, the atmosphere is more of a factor (it is clearest in red). Not having seen the raw data though, I am purely speculating.


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OWW
post Nov 28 2007, 12:37 AM
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If you browse through all the hirise releases you'll notice that many of the images taken after April 2007 or so are extremely noisy.
Images like http://hirise.lpl.arizona.edu/PSP_005581_1815 are so bad they look like they are binned 2x2 but they're not. Occasionally, like http://hirise.lpl.arizona.edu/PSP_005414_1735 , there's almost no noise at all.

Could it be the extra dust in the air since the Great Dust Storm is making the CCD-noise problem worse than before?
http://themis.asu.edu/dustmaps/ shows there STILL seems to be extra dust above Meridiani, so that could be it.
Does anybody know when and where exactly the dust activity began last Spring? Worth checking out.
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