The Top of Vera Rubin Ridge Part 2, Site 67-73, sol 1944-2297, 24 Jan 2018-22 Jan 2019 |
The Top of Vera Rubin Ridge Part 2, Site 67-73, sol 1944-2297, 24 Jan 2018-22 Jan 2019 |
Oct 26 2018, 10:43 AM
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#526
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
Hi
Nice to get some new pictures. Sol 2210 Navcam panoramic, with rover body. Looks a bit dusty after the "Great Storm 2018". -------------------- |
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Oct 26 2018, 12:16 PM
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#527
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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Oct 28 2018, 03:00 AM
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#528
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Good to see some of the science cameras back in action
Here's an animated GIF of the unsuccessful drill attempt at Inverness. I have used just two frames, one from sol 2171 and the other from 2211. We can observe that many the fines and drill cuttings have been removed by the wind, there are also movement of some very small pebbles. I reduced the animation width to 1024 px to ease loading time. I roughly aligned the frames by adding margins. R-MastCam raw frames: 2171 & 2211 |
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Oct 28 2018, 08:38 PM
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#529
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
Here is a link to an animated gif of lens corrected rear left hazcam from sols 2210&2209. ( swapped sols to provide a contiguous sequence )
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Oct 29 2018, 03:33 PM
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#530
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
Good to see some of the science cameras back in action Here's an animated GIF of the unsuccessful drill attempt at Inverness. I have used just two frames, one from sol 2171 and the other from 2211. We can observe that many the fines and drill cuttings have been removed by the wind, there are also movement of some very small pebbles. I reduced the animation width to 1024 px to ease loading time. I roughly aligned the frames by adding margins. R-MastCam raw frames: 2171 & 2211 Hmm, I see the color of the rocks that were abraided have faded back to the color of the surrounding outcrop. I wonder how much of that is atmospheric dust deposition vs. a surface oxidation of the rock after being exposed to the atmosphere. I think if it were a flat surface I would just say 'airfall' and be done with it, but it seems like that little pebble sticking up in the DRT(?) scour changed uniformly too. |
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Oct 29 2018, 03:50 PM
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#531
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Senior Member Group: Members Posts: 2833 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
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Oct 29 2018, 06:23 PM
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#532
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Two panoramas from the same spot, but not exactly the same - here are circular versions of Damia's and Jan's panoramas. You can see the arm moved, and Damia's view covers the rover deck.
Phil Left: Damia, sol 2210: Right: Jan, sol 2214: -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 29 2018, 06:25 PM
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#533
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Justin: "------vs. a surface oxidation of the rock after being exposed to the atmosphere"
Would the surface oxidize in 40 sols in a thin dry CO2 atmosphere? Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 29 2018, 09:30 PM
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#534
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
It could be possible. I had an opportunity to talk to Steven Chemtob a few weeks ago about his work in oxidative processes in smectite. He suggested that UV photooxidation might contribute to the oxidized surface rinds we've seen through Gale Crater. I had asked him whether that occurred at an observable rate, and he suggested it was a relatively slow process for bulk materials but might form extremely thin rinds on short time scales. We ended up talking about trying an experiment late in the mission, once Curiosity was permanently parked. The idea was that we'd scratch the surface with the DRT, and then occasionally check for oxidation state changes with passive ChemCam spectra.
I doubt 40 days is enough time to form a photooxidation rind (we were talking a year or two), but seeing the uniform color changes in that blink comparison brought the conversation back to mind. It could be a good opportunity to check! |
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Oct 30 2018, 04:10 AM
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#535
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Very interesting. Thanks!
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 30 2018, 05:16 AM
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#536
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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Nov 1 2018, 01:03 AM
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#537
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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Nov 1 2018, 05:37 PM
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#538
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
It could be possible. I had an opportunity to talk to Steven Chemtob a few weeks ago about his work in oxidative processes in smectite. He suggested that UV photooxidation might contribute to the oxidized surface rinds we've seen through Gale Crater. I had asked him whether that occurred at an observable rate, and he suggested it was a relatively slow process for bulk materials but might form extremely thin rinds on short timescales. We ended up talking about trying an experiment late in the mission, once Curiosity was permanently parked. The idea was that we'd scratch the surface with the DRT, and then occasionally check for oxidation state changes with passive ChemCam spectra. I doubt 40 days is enough time to form a photooxidation rind (we were talking a year or two), but seeing the uniform color changes in that blink comparison brought the conversation back to mind. It could be a good opportunity to check! Well, a recent paper suggests that dust storms should be incredibly good at making highly-oxidizing perchlorates, so we might expect a short-term oxidation event, IF the recent global dust storm manufactured as much perchlorate as some models suggest... "strong electric fields, such as those created by static electricity in global dust storms, could break down gases in the Martian atmosphere and thus drive perchlorate-generating reactions." QUOTE (www.sciencemag.org/news/2018/10/martian-dust-devils-may-create-rare-rocket-fuel-ingredient) The team estimates rates of perchlorate formation inside martian dust storms could be as much as 10 million times higher than those driven by sunlight
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Nov 1 2018, 07:07 PM
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#539
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Have any electric discharge events been recorded unambiguosly on Mars in the meanwhile? The basis of according data has been rather subtle the last time I looked for it, e.g. here.
Such recordings would be required for the sketched perchlorate formation path to be fairly convincing. I thought, that further remote measurements have been considered. But I don't know about any recent results. |
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Nov 1 2018, 08:23 PM
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#540
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
Have any electric discharge events been recorded unambiguosly on Mars in the meanwhile? The basis of according data has been rather subtle the last time I looked for it, e.g. here. Such recordings would be required for the sketched perchlorate formation path to be fairly convincing. I thought, that further remote measurements have been considered. But I don't know about any recent results. Cite is Forming perchlorates on Mars through plasma chemistry during dust events https://www.sciencedirect.com/science/artic...5065?via%3Dihub |
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