Going To Mogollon..., ...and points South |
Going To Mogollon..., ...and points South |
Jan 20 2006, 02:30 PM
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
QUOTE (Tesheiner @ Jan 20 2006, 05:38 AM) It was already said that those structures seen on previous hazcam pics (well, in all sort of cameras and filters...) were delicate. [attachment=3535:attachment] (138k) But what about these ones? It looks like the smallest touch could broke them. [attachment=3536:attachment] (138k) PS: It's time to open a new thread, don't you think so? Good idea. That topic was "tired" and had the cord showing. Delicate, to be sure. One thing I've noticed is that the "ledge-forming" rocks are a layer and extend to the right and left of where we camped out. I wonder if that feature is related to the bluff at Mogollon Rim? We need to check out the "mobile dust" at that site and see if there has been more movement during the stopover. --Bill -------------------- |
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Mar 14 2006, 06:31 PM
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
That's an internal refraction - the optics bouncing a little bit of the sun around. A lot of the solar images show it as well.
Doug |
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Mar 14 2006, 06:46 PM
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
That's an internal refraction - the optics bouncing a little bit of the sun around. A lot of the solar images show it as well. The is a refraction artifact but there is a lovely ring of clouds just above it that I don't think is an artifact. Very smoke ring like |
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Mar 14 2006, 08:43 PM
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
The is a refraction artifact but there is a lovely ring of clouds just above it that I don't think is an artifact. Very smoke ring like What do I get for spotting the first flying saucer on Mars? Who said "certified"? -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Mar 14 2006, 09:28 PM
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Member Group: Members Posts: 198 Joined: 2-March 05 From: Richmond, VA USA Member No.: 181 |
I'm having to post and leave pronto, so I appologize for a brief post...
I've been facinated by the chance of spotting CO2 or water ice halo's in MER imagery. None have been spotted yet to my knowlege, and while hopefull I am doubtfull that Oppy's sol758's cloud imagery contains any either. None the less, I thought a pair of 'brightenings' in Oppy's clouds were interesing enough to post in order to get some feedback (I hope). Any thoughts? (Thank you mhoward!) -- Pertinax |
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Mar 15 2006, 01:52 AM
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Member Group: Members Posts: 166 Joined: 20-September 05 From: North Texas Member No.: 503 |
I've been facinated by the chance of spotting CO2 or water ice halo's in MER imagery. None have been spotted yet to my knowlege, and while hopefull I am doubtfull that Oppy's sol758's cloud imagery contains any either. None the less, I thought a pair of 'brightenings' in Oppy's clouds were interesing enough to post in order to get some feedback (I hope). -- Pertinax I'm a meteorologist, but certainly no expert in atmospheric optics. But here's a great link to the best explanation of the subject that I know of on the web. Perhaps a detailed analysis of the photos would reveal whether the "brightening" you see corresponds with any of the parhelia features discussed in the link. http://www.atoptics.co.uk/ David |
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Mar 15 2006, 06:16 PM
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Member Group: Members Posts: 198 Joined: 2-March 05 From: Richmond, VA USA Member No.: 181 |
QUOTE (Dilo @ March 13 2006, 05:51 PM) I do not see the feature you highlighted and I wonder about Crystal selection window... are colors associated to some kind of simulation you ran? The brighening is somewhat subtle, and easier to see if the unannotated and annotated images are compared side by side. The colors are from a simulation for some potential martian ice halo's (CO2 and H2O). (See: Halo Sim). Les and Michael were kind enough several years back to share their CO2 crystal files with me for a few projects I was working on at the time. As I was hurrying yesterday, the crystal settings are actually the same as used for Les' image posted here: Martian Halos. With respect the the brightening, I don't think a diffinitive answer can be made, as the brightening I noted could also be an optically denser patch of cirrus. More cirrostratus-like clouds would be better at presenting halos in nonmultispectral imagery (see: FIDO: 20020812164623_nav for example). Lastly, and again aganst these brightening being caused by any refractive phenomena, the brightenings that corresponded with the halo simulation were associated with CO2 cuboctahedron ice crystals, not haxagonal water ice cyrstals. My understanding is that these are water ice clouds. Any MiniTes measurements to the contrary? Longwinded (making up for yesterday ), but I hope that helps. -- Pertinax |
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Mar 15 2006, 09:27 PM
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Thank you very much, Pertinax... I completely missed the Mars halos item, now I'm delighted and amazed by this argument!
I like very much also the site you linked (my preferred pages are this and this one). About your possible identification of "CO2 cuboctahedron ice crystals" halo, however, I hardly see it... from a strongly processed version of this image (where I removed very low frequency components) my impression is that you catched a cirrus, at least in the right portion... PS: based on this simulations, in the top-left image portion, shouldn't we see also some CO2 parhelia? -------------------- I always think before posting! - Marco -
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