Jezero Delta Campaign, Sols 414-1000, 21 Apr 2022- 23 Dec 2023 |
Jezero Delta Campaign, Sols 414-1000, 21 Apr 2022- 23 Dec 2023 |
Oct 19 2022, 08:57 PM
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#436
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Member Group: Members Posts: 680 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Oct 19 2022, 08:58 PM
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#437
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Member Group: Members Posts: 680 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Oct 20 2022, 08:03 AM
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#438
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
After ~4 weeks at Amalik the rover has driven away during Sol 592, the map has not been updated yet, but it looks close to 40 meters north.
Here is one of the post-drive tiled NavCams that features a TAR where the rover may take a regolith sample. The mosaic was downlinked as a 4x4 tiled set, but I have reduced its size to match the 2x2 sets. The rover may need a bump to reach the TAR (if they choose to sample here) |
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Oct 20 2022, 08:55 PM
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#439
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Solar System Cartographer Group: Members Posts: 10173 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... 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 21 2022, 01:49 PM
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#440
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
A short drive up to a transverse aeolian ridge (TAR) on Sol 593. Once there the wheel tracks indicate that they swept the front right-side wheel onto and off the TAR. I'm assuming they did this to expose some fresh regolith for investigation with the rover's instruments. Looks like a possible site to use the regolith sample bit for the first time. I've attached three end-of drive NavCam's and one Front HazCam roughly assembled in MS-ICE and processed to highlight the terrain. The other 2x2 sets had some data drop out on a number of tiles.
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Oct 21 2022, 05:44 PM
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#441
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Member Group: Members Posts: 680 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Oct 21 2022, 07:17 PM
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#442
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
PaulH51
Regolith sample bit? Shelby tube? Split spoon? Osterberg? I'll need to read up on that. -------------------- |
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Oct 21 2022, 10:53 PM
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#443
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
PaulH51 Regolith sample bit? Shelby tube? Split spoon? Osterberg? I'll need to read up on that. Here's an extract from "The Sampling and Caching Subsystem (SCS) for the Scientific Exploration of Jezero Crater by the Mars 2020 Perseverance Rover" link (Paywalled) QUOTE The sample acquisition process for regolith collection is different from coring. During regolith sample collection, the RA positions the Turret and Corer so that the Regolith Bit is facing downward near the sampling target. The Corer Feed mechanism moves the Regolith Bit downward into the regolith while combining Spindle rotation and Percussion operation, but there may also be small Turret sweeping motions of up to a few degrees during acquisition to aid in regolith collection. After retraction of the Regolith Bit, a short Percussion operation levels the sample, and the RA moves the Turret through some prescribed motions (to “flip” the regolith from the head into the Sample Tube) and Percussion operation to ensure that the regolith sample is moved adequately into the Sample Tube. Nominal samples of 8 cc at acquisition are controlled by the Regolith Bit tip geometry (although some compaction or loss can occur during Percussion operation and transfer to the Sample Tube). |
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Oct 23 2022, 07:02 AM
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#444
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Solar System Cartographer Group: Members Posts: 10173 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... 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 23 2022, 03:13 PM
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#445
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Member Group: Members Posts: 680 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Oct 23 2022, 07:32 PM
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#446
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Member Group: Members Posts: 680 Joined: 9-May 21 From: Germany Member No.: 9017 |
1. Sol 594 image of the sand dune by the SHERLOC WATSON camera
2. Mastcam-Z context 3. High-resolution details from the SHERLOC WATSON image, low-resolution colors from the Mastcam-Z multispectral principal components image in the previous post. Strong parallax between Mastcam-Z and SHERLOC WATSON camera prevents a better alignment of details and colors. |
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Oct 23 2022, 08:12 PM
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#447
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
Re: PaulH51 Post 443:
Yes, that is elegant and will get us an undisturbed sample from that spot. It will give us short history of aeolian processes at that spot. --Bill -------------------- |
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Oct 25 2022, 09:34 PM
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#448
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Solar System Cartographer Group: Members Posts: 10173 Joined: 5-April 05 From: Canada Member No.: 227 |
Old-timers will remember the Rover Field Reports from Mars written (and illustrated) by Larry Crumpler. I have just discovered that Larry has been putting together sporadic reports for Perseverance:
https://www.nmnaturalhistory.org/space-scie...rts-mars?page=1 (Sporadic means only 2 since landing but the second is recent). Also you can look through lots of old ones for Opportunity (maybe Spirit but I didn't look back far enough). 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 26 2022, 02:12 PM
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#449
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
I'd forgotten about Larry Crumpler and his wonderful Rover Reports. Even the couple of reports presented were great.
I wonder what happened to them? Larry is apparently still on the JPL Rover Team. --Bill -------------------- |
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Nov 4 2022, 12:25 AM
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#450
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Senior Member Group: Members Posts: 2429 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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