Spirit from HiRISE on Home Plate |
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Spirit from HiRISE on Home Plate |
 Nov 25 2007, 07:15 PM
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#1
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Member  Group: Admin Posts: 466 Joined: 11-February 04 From: USA Member No.: 21  |
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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Nov 27 2007, 09:53 AM
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#2
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 Member Group: Members Posts: 316 Joined: 1-May 06 From: Scotland (Ecosse, Escocia) Member No.: 759 |
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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Nov 27 2007, 10:00 AM
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#3
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 Administrator Group: Chairman Posts: 13234 Joined: 8-February 04 Member No.: 1 |
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Nov 27 2007, 10:02 AM
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#4
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Member Group: Members Posts: 316 Joined: 1-May 06 From: Scotland (Ecosse, Escocia) Member No.: 759 |
[quote name='djellison' date='Nov 27 2007, 10:00 AM' post='104651']
You missed out the only real link that matters  I was just adding it when you spotted my slip with such alacrity....
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Nov 27 2007, 10:04 AM
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#5
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 Senior Member Group: Members Posts: 3534 Joined: 1-October 05 From: Croatia Member No.: 523 |
Wow, that's a rather noisy image there...
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Nov 27 2007, 06:00 PM
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#6
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 Bloggette par Excellence Group: Admin Posts: 3963 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
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?
--Emily -------------------- |
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Nov 27 2007, 11:40 PM
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#7
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 Member Group: Members Posts: 428 Joined: 21-August 06 From: Tucson, AZ Member No.: 1062 |
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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Nov 28 2007, 12:13 AM
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#8
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 Interplanetary Dumpster Diver Group: Moderator Posts: 4042 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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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Nov 28 2007, 12:37 AM
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#9
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 Member Group: Members Posts: 686 Joined: 28-September 04 Member No.: 99 |
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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