InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
Oct 16 2019, 06:19 PM
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#721
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Martian Photographer Group: Members Posts: 352 Joined: 3-March 05 Member No.: 183 |
Sirius. Neither moon enters ICC field of view.
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Oct 16 2019, 08:05 PM
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#722
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
Thanks, Deimos. Makes sense: centre of field of view very roughly 10 deg west of south, the right edge of ICC would be crudely 75 deg west of south, so unable to see the equatorial moons from 4.5 deg N latitude.
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Oct 17 2019, 08:13 PM
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#723
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Senior Member Group: Members Posts: 2425 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
News release from NASA/JPL Link "Mars InSight's 'Mole' Is Moving Again"
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Oct 18 2019, 12:22 AM
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#724
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Oct 18 2019, 06:15 AM
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#725
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
it's no longer a mole, they should consider renaming it "the corkscrew"
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Oct 18 2019, 05:40 PM
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#726
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Senior Member Group: Members Posts: 1578 Joined: 14-October 05 From: Vermont Member No.: 530 |
Tilman's logbook at DLR updated:
https://www.dlr.de/blogs/en/all-blog-posts/...on-logbook.aspx QUOTE Good news from Mars, DLR´s 'Mole' has moved forward! The HP3 heat flow probe has moved a total of two centimeters (calculated from the image data by Troy Hudson and Bob Deen, JPL/Caltech) downward in three hammering sessions with carefully chosen 20 and then two times 100 strokes.
... Eventually, the Mole must work on its own but we will support it at shallow depths by loading the ground by pushing hard on the surface with the scoop. There has been rotation of the Mole around its axis, more so in the first two hammering sessions. We are carefully watching the rotation. From testing in the testbed on Earth we know that the probe tends to rotate as it penetrates. Once the tether is in the ground we expect it to act as a fin that will reduce the rotation as it did in the testbed. |
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Oct 18 2019, 05:50 PM
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#727
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Junior Member Group: Members Posts: 43 Joined: 13-June 08 Member No.: 4206 |
If the mole is able to rotate on its own without contact from the scoop. Then it's simply a result of rotary components being used internally. Not too unlike ball-point pen retraction/ratchet mechanism that is able to recoil.
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Oct 18 2019, 11:08 PM
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#728
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
I'd thought the rotation was due to some complex interaction between the mole, scoop and soil constraints at gravity angle, but indeed its as if its roller-cam setup was inspired by a ball point pen clicker, it seems like it could impart CCW rotation when the roller edges over the 'cliff'. This site has many papers on the HP3 hammering mechanism.
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Oct 20 2019, 07:09 AM
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#729
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Member Group: Members Posts: 112 Joined: 20-August 12 From: Spain Member No.: 6597 |
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Oct 20 2019, 12:38 PM
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#730
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Member Group: Members Posts: 100 Joined: 20-January 06 Member No.: 652 |
The mole doesn't seem to be rotating in this hammering session. Maybe it was spinning away from an obstacle, or it is in firm contact with the soil now which has created more friction?
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Oct 21 2019, 05:20 AM
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#731
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
Does the Tether Unit have to be moved back above mole?
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Oct 21 2019, 08:24 AM
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#732
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Senior Member Group: Members Posts: 2425 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Does the Tether Unit have to be moved back above mole? "The team are indeed considering replacing the support structure so the science tether will have a direct line down into the soil from the TLM, rather than having to do a dog-leg. Agreement to do that, and agreement on exactly how it would be done are being actively pursued." (Source a member of the team) |
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Oct 22 2019, 03:26 PM
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#733
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Senior Member Group: Members Posts: 1578 Joined: 14-October 05 From: Vermont Member No.: 530 |
Tom Hoffman did a presentation at the Mars Society Convention (again). Space.com has pullquoted it somewhat, but the replay isn't yet on YouTube.
https://www.space.com/mars-soil-weird-nasa-...ght-lander.html |
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Oct 22 2019, 10:07 PM
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#734
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Oct 23 2019, 09:44 PM
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#735
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Solar System Cartographer Group: Members Posts: 10128 Joined: 5-April 05 From: Canada Member No.: 227 |
On sol 322 the scoop was moved sideways slightly, away from the mole, and then pushed down to touch the mole again at a lower position, to keep contact with the mole as it descends.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke 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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