InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
Aug 8 2019, 09:05 PM
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#661
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Senior Member Group: Members Posts: 2917 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
.... but since I'm an engineer I have to point out that an MSL drill hole is about 17mm in diameter and 4 cm deep, and the HP3 mole is 27mm in diameter.... Apollo 13´s CO2 removal stile -------------------- |
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Aug 11 2019, 01:36 AM
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#662
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Senior Member Group: Members Posts: 2425 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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Aug 11 2019, 04:23 AM
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#663
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
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Aug 11 2019, 06:29 PM
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#664
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
Doing something similar with the sol 243 image, I think there is certainly some extra material in the hole on sol 250.
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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Aug 13 2019, 02:33 AM
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#665
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
looks a bit better on sol251
https://mars.nasa.gov/insight-raw-images/su...0000_0250M_.JPG based on the integrity of the hole, it makes sense such a simple pressing action would not fill the hole very much further than it has already collapsed, and even so the resultant infill would be too loose and leave a derth of soil around the probe that would tend to complicate attempts at further compaction, so it would seem the approach requires additional soil followed by compressive pressing.. im sure they've already tried different approaches based on all foreseen contingencies, well see what comes up next. |
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Aug 14 2019, 04:55 PM
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#666
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
There were two separate scoop contacts on sol 250, and now two more on sol 253. It looks like the strategy is to press in different locations to encourage material to slump into the hole, though it's not always apparent that anything happened. The first contact on sol 250 did result in a slump of material into the hole. Whether this is enough, or whether more material will have to be pulled in, is something we will have to wait to see.
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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Aug 14 2019, 06:19 PM
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#667
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
Here is the hole after sol 253, brightened to show debris in the hole. A bit more than on sol 250, but not much more.
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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Aug 15 2019, 06:26 PM
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#668
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Aug 22 2019, 10:10 PM
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#669
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
Looks like we will be waiting until after conjunction for any more progress on the mole. My impression so far is that the strategy of making the wall of the pit collapse is not going to be enough, so maybe we will see the scoop pulling soil towards the hole.
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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Aug 22 2019, 11:21 PM
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#670
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Senior Member Group: Members Posts: 2425 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Looks like we will be waiting until after conjunction for any more progress on the mole. My impression so far is that the strategy of making the wall of the pit collapse is not going to be enough, so maybe we will see the scoop pulling soil towards the hole.... Sounds like a good call Phil: Blog update from Leonard Davis: http://www.leonarddavid.com/mars-insight-mole-madness/ |
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Aug 29 2019, 03:22 PM
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#671
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Senior Member Group: Members Posts: 1578 Joined: 14-October 05 From: Vermont Member No.: 530 |
Mole update from DLR
https://www.dlr.de/blogs/en/all-blog-posts/...aspx/ressort-2/ QUOTE I am thinking towards pinning the mole with the scoop such that the pinning and the pressing of the mole against the wall of the pit would increase friction. This will be more risky than the previous strategy, but with the unexpectedly stiff duricrust, it may be worth a try.
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Aug 29 2019, 06:47 PM
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#672
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
Thanks for sharing that link, its incredible to consider the duricrust is being so resistant that even pressing with the blade tip didn't collapse the pit appreciably, which backs up the inference that the tiltmeter recordings support the scenario of "...the mole first lifted the SSA while at the same time penetrating slowly about 7 cm until it had hammered through the duricrust and the SSA resettled on the ground.", suggesting that pinning the mole against the wall of the pit may indeed be perhaps the best remaining option.
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Aug 29 2019, 08:46 PM
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#673
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
I guess one worry with pinning the mole with the scoop is what happens after the mole digs in completely below the surface. Then the scoop will no longer be able to provide pressure so there's a risk that the mole will stall again in loose soil or a new cavity. What about scooping/scraping soil into the hole in addition to pinning with the scoop? Is there much risk with scooping/scraping?
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Aug 29 2019, 10:37 PM
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#674
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
The risk might be that the surface is unpredictable if it's cemented, rather than loose sand or dust. The scoop might stall and then jump, or a plate of duricrust might break and shift, at an unpredictable location.
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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Aug 30 2019, 10:00 PM
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#675
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Newbie Group: Members Posts: 17 Joined: 8-September 15 Member No.: 7773 |
What about digging a hole farther away, in order to better understand soil properties and to get some material to file to mole hole ?
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