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InSight Surface Operations, 26 Nov 2018- 21 Dec 2022
atomoid
post Jun 5 2019, 10:05 PM
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Good to hear they are finally going to try something out!
The grapple seems to be optimized for securing specifically designed handles, but as we've seen such challenges spark ingenuity in the past there will be no shortage of novel approaches put forward, if complete instrument deployment failure is assumed after exhausting all safer approaches, then with nothing to lose and power to spare, push comes to shove more ambitious possibilities to emerge.
Worst case, could the grapple secure an accessible portion of played-out tether between its 'fingers' and be able to relocate even a reclined probe back to a useable place whether it be the original hole or a new divot crudely scraped by the shovel? just spooling whimsicals here but the grapple might even be able to mimic the effect of the tether spool enclosure and hover the probe to slowly lower over the course of the percussion process. any such Hail-Mary approach would surely be way down the road.

Found this Q&A article regarding their latest plans.
Here's to hoping the pressure of the arm can induce friction enough to help the mole establish and sustain its own friction as it descends into presumably more compacted soils, assuming that implies increased friction to work with, but it may just mean creating a more resilient hollow in which to get stuck.
Relocating the probe: "the mole was never designed to be handled that way" at some point they could try to handle it in a way it was NOT designed for.
No-friction scenario: As a lay person, I'm havent studied up and am somewhat out of sync with accepted assumptions, not attempting to second guess, but trying to understand why just below the surface it would not be expected to be a sand and dust covered jumbled rockpile atop bedrock, as that seems to be what we see elsewhere. they suggest a few percent chance of hitting rock, i would have assumed it over 90% within the first meter. But anyways, since the no-friction scenario seems to fit with the data, was SEIS used to determine if the probe is or is not hitting rock? I'd assume SEIS would yield a very different signal if is hitting rock vs the no-friction 'bouncing' scenario, or maybe the signal isnt that different if the sand/dust gets compacted enough and resemble a signal from rock.?
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Phil Stooke
post Jun 6 2019, 02:11 AM
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I think the SEIS team did listen very carefully to the hammering to help the diagnostics.

Anyway, it looks like I will get my wish and have some more events to map later this month. The idea of pressing on the surface to try to increase friction leads me to think a few bearing tests (pressing down on the surface to see how it responds) might have been useful, but hindsight is always helpful. Or in this case, not!

Phil


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nprev
post Jun 6 2019, 02:33 AM
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More hindsight/speculation: I wonder if SEIS could have been used to 'map' a small area of the soil down to a depth of several centimeters by moving the mole to slightly different locations and actuating the driver while the mole was still caged in the assembly. Might've been able to infer some subsurface rocks that way.


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PaulH51
post Jun 6 2019, 06:24 AM
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Not sure why they have to wait until the end of June to start lifting the housing, but the grapple is currently placed above the pickup pin on HP3

Contained in the same release was news regarding the detection during May 22, 2019 of what is believed to be a marsquake of magnitude 3.0.

In a tweet from SEIS they stated that it was 'five to ten times more powerful than the previous ones' (back in April) Hopefully that could have provided some early data on the interior structure of the planet, or maybe they're waiting for a bigger one for that smile.gif
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PaulH51
post Jun 6 2019, 12:58 PM
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The HP3 mission blog from Instrument Lead Tilman Spohn has now been updated with some additional details not in the press release
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stevesliva
post Jun 6 2019, 01:49 PM
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QUOTE (PaulH51 @ Jun 6 2019, 01:24 AM) *
Not sure why they have to wait until the end of June to start lifting the housing, but the grapple is currently placed above the pickup pin on HP3

May just be start / end semantics. Because I read everything as saying they're starting ASAP, but that it will be deliberate. From Tilman @ DLR:

QUOTE
a operations scheme has been designed where the lifting occurs in several steps with careful examinations on the way. This is then the major reason why the operation will take a while, until mid next month or possibly even later.

For those trying to parse that blog entry, the ideal spot 1 is unreachable without moving the support structure. Spot 2 is also unreachable. Only "Achievable Spot 2" can be pressed on without moving the structure. The graph indicates that even unachievable spot 2 is marginal, so they really think Spot 1 is necessary... so they conclude it must be moved.
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PaulH51
post Jun 9 2019, 07:43 AM
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Hard to be sure, but it appears close to a capture smile.gif (sol 189 IDC GIF)
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PaulH51
post Jun 13 2019, 11:21 AM
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The grapple on the Robotic arm that is currently attached to HP3 was lifted a little on sol 193 as seen in the 4 IDC frames that were acquired close to sunset. The structure was not lifted off the ground, but raising the arm appears to have taken up the slack on the lifting pin. The latest of those 4 IDC frames is time stamped as 5:30 pm local time, so unless they are planning a little more lifting in twilight, we may have to await until tomorrow to see the first lift that could take place this week link
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fredk
post Jun 13 2019, 02:11 PM
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A correction at the bottom of that page says the move is planned for later in June, as we'd heard before.
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PaulH51
post Jun 13 2019, 07:14 PM
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QUOTE (fredk @ Jun 13 2019, 10:11 PM) *
A correction at the bottom of that page says the move is planned for later in June, as we'd heard before.

And there was me getting ready for the lift (sigh)
Small print, always look for and read the small print...
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PaulH51
post Jun 14 2019, 12:44 PM
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DLR HP3 Blog Logbook entry 14 June 2019:

QUOTE
The support structure lifting operation has begun! The GIF below shows how the grapple of the arm grabs the hook at the top of the SSA.

The lifting is foreseen to start on 22 June - first at 12 centimetres, then at 25 centimetres on 25 June and, finally, on 28 June the structure should be completely lifted and moved about 10 centimetres towards the lander.


link to full blog
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nogal
post Jun 14 2019, 06:03 PM
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Above the blog entry for June 6 there is an animated GIF (of the June 14 entry).
The shadow of the grapple helped me understand the SSA's hook capture.
Fernando
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Phil Stooke
post Jun 20 2019, 07:53 PM
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This is my suggestion for the identity of the hill seen to the northwest and illustrated a few posts back. I think candidate 2 is a better bet than candidate 1.

Phil

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Phil Stooke
post Jun 23 2019, 07:49 PM
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Sol 203 - the HP3 was lifted a few cm.

Phil


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alan
post Jun 23 2019, 09:06 PM
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Someone is claiming the mole is out:

https://twitter.com/Simon11129621/status/1142858628568891392

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