InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
Nov 26 2018, 08:20 PM
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#801
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Congratulations to the InSight team on a successful landing! We'll discuss the remainder of the mission here.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jan 23 2020, 12:19 PM
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#802
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Senior Member Group: Members Posts: 1053 Joined: 17-February 09 Member No.: 4605 |
Initially the team believed that the obstruction causing the mole to bounce back out of the ground could not be a buried rock because there were so few rocks on the surface and these were small. However the rock excavated by the lander exhaust exhaust as illustrated below raises a few doubts. The mole was designed to veer around a small obstruction but if it encountered a buried rock of similar size and shape this would explain the current angle of attack and repeated bounce back. Perhaps moving the mole as Algorithm suggests would be high risk and aligning it vertically and keeping it stable for initial penetration without damaging the ribbon would seem near impossible. But the current approach is not achieving much and who dares wins. (sometimes).
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Jan 23 2020, 03:40 PM
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#803
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
if it encountered a buried rock of similar size and shape this would explain the current angle of attack and repeated bounce back. From what we've heard from the team, the behaviour so far is consistent with bouncing back due to lack of friction, not hitting a rock. The crucial question is: can pressure be applied by the scoop until the mole gets deep enough that it can "get a grip" on its own? |
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Jan 23 2020, 04:09 PM
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#804
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
The crucial question is: can pressure be applied by the scoop until the mole gets deep enough that it can "get a grip" on its own? I see it as a question of "long term" versus "short term."Short term - outcome orientated: how do we get the mole to work in this soil. Long term - observation orientated: how much DON'T we know about martian soils? Smacking and scratching the soil around Insight is basic research How variable IS martian soil? At what SCALE do the properties (grain size/cohesion/cementign) change? Is the soil variable at a scale of decimeters, meters? |
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