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Bright Flares from Scraped Rocks!?, Spirit Pancam saturated by Wheel-scraped Rocks?
Shaka
post Oct 26 2007, 09:29 PM
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ohmy.gif What's with the recent Pancams of HP surface rocks scraped by the stuck wheel?
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Reflections in some areas are so bright that the image flares dramatically. I've never seen this before from Mars rocks except in tiny spots on Comanche rock. Only man-made metal surfaces on the rovers and heat shields have dazzled like this.
The flares occur in both the left and right cameras and also in some Navcam shots. What are these rocks made of that they would reflect so brightly? Can there be accidental overexposures under unusual light conditions?
Can some "Image Mage" explain this as an artifact? blink.gif


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My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Shaka
post Oct 27 2007, 10:24 PM
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Thanks, Doug; it's bookmarked. Wow, I was amazed at the lack of contrast in those images - like everyday was in the worst of a duststorm, or a salmon fog.
Is everyone satisfied that they are the closest to what we would see if we were standing there? I mean in a spacesuit with a clear visor.
Anyhow, I hope some of our guys can scoop them with the approximate Exploratorium product. Damn, I'm panting for some MIs of that rock! rolleyes.gif


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djellison
post Oct 28 2007, 08:44 AM
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QUOTE (Shaka @ Oct 27 2007, 10:24 PM) *
Is everyone satisfied that they are the closest to what we would see if we were standing there?

You can argue that one all you like (and you probably will, but not in this thread). No two people see the same scene exactly the same anyway. It's the MER's team best approximation. If you want a different persons take on it - try Dan's calibrated set that you can get via MMB - he has a different tack on it. The perception of colour is, at the end of the day, a rough, artistic science. There's a lot of science and many algorithms behind it - but it's essentially a judgement call at the end of the day. Different eyes, different monitors, different lighting conditions - none of which are calibrated. I have two screens at work - on one of them, Mars always looks crap - without fail. It just can't do justice to those colour ranges. My personal preference ( which is what this has to end up being ) is about half way between Dan's and the PC team.

Doug
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Posts in this topic
- Shaka   Bright Flares from Scraped Rocks!?   Oct 26 2007, 09:29 PM
- - tty   My immediate reaction was mica, but there are seve...   Oct 26 2007, 09:40 PM
|- - Shaka   QUOTE (tty @ Oct 26 2007, 11:40 AM) Pyrit...   Oct 27 2007, 03:01 AM
- - Bill Harris   I noticed it too, and I've been snagging Panca...   Oct 27 2007, 02:35 AM
|- - dvandorn   QUOTE (Bill Harris @ Oct 26 2007, 09:35 P...   Oct 28 2007, 04:31 AM
|- - Bill Harris   QUOTE (dvandorn @ Oct 27 2007, 11:31 PM) ...   Oct 28 2007, 11:58 AM
|- - Del Palmer   QUOTE (Bill Harris @ Oct 28 2007, 11:58 A...   Oct 28 2007, 03:47 PM
|- - Tesheiner   QUOTE (Del Palmer @ Oct 28 2007, 04:47 PM...   Oct 29 2007, 03:07 PM
- - ElkGroveDan   A large faceted crystal will catch light that way,...   Oct 27 2007, 03:16 AM
- - mhoward   FWIW, here's the context and a view of the sam...   Oct 27 2007, 03:52 AM
- - Shaka   It's all good, guys, but can someone put toget...   Oct 27 2007, 08:13 PM
|- - djellison   QUOTE (Shaka @ Oct 27 2007, 09:13 PM) can...   Oct 27 2007, 09:39 PM
- - Shaka   Thanks, Doug; it's bookmarked. Wow, I was ama...   Oct 27 2007, 10:24 PM
|- - djellison   QUOTE (Shaka @ Oct 27 2007, 10:24 PM) Is ...   Oct 28 2007, 08:44 AM
|- - slinted   Thanks for your kind words Doug. I take as high p...   Oct 28 2007, 12:13 PM
- - Bill Harris   There is a series of partial-frame L456 Pancams on...   Oct 29 2007, 02:19 PM
- - Phil Stooke   Bill, I wouldn't worry too much. If aluminum ...   Oct 29 2007, 02:24 PM
- - alan   Data loss, twice? On both images? http://qt.exp...   Oct 29 2007, 04:54 PM
|- - mhoward   QUOTE (alan @ Oct 29 2007, 09:54 AM) Data...   Oct 31 2007, 03:50 AM
- - Bill Harris   Agreed, Phil, we can run her til the wheel falls ...   Oct 29 2007, 07:15 PM
- - fredk   A very nice reflective trail across the lower part...   Nov 1 2007, 02:48 AM
|- - ElkGroveDan   QUOTE (fredk @ Oct 31 2007, 06:48 PM) I a...   Nov 1 2007, 04:02 AM
- - fredk   I'm not convinced this is scraped off aluminum...   Nov 1 2007, 05:08 AM
|- - AndyG   QUOTE (fredk @ Nov 1 2007, 05:08 AM) I...   Nov 1 2007, 11:09 AM
- - monitorlizard   If this were scrapings of pure aluminum, or a pure...   Nov 1 2007, 12:03 PM
- - Bill Harris   Even though I brought up the supposition that the ...   Nov 1 2007, 12:12 PM
- - tasp   IIRC my metallurgy training (going on 30 years, no...   Nov 1 2007, 02:11 PM
- - Bill Harris   New L257 and R721 Pancams of a couple of these sat...   Nov 3 2007, 01:47 PM
- - Shaka   Extending the topic of interesting rocks on the su...   Nov 6 2007, 08:27 PM


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