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Robot Arm - Observations and Excavations
Steve G
post May 30 2008, 05:15 AM
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Tricky to line up the two RAC images but here is my attempt.

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MicroKid
post May 30 2008, 06:26 AM
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Any idea what the long spiral looking object (lower left) next to the landing pad is?

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Steve G
post May 30 2008, 06:48 AM
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I was wondering that when I stitched the images together, and the first thing that came to mind was Khan's pet ear wig . . .

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It is out of sight from the SOL 1 footpad image and nearly beneath the lander, but by the surrounding soil, it looks like it fell from the lander. The resoltion of the RAC is only 256 X 512 so we need to creep lower for a better look.
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djellison
post May 30 2008, 07:51 AM
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EGD had a go at this in the Sol 3+ thread, I'm kicking of an RAC lander-imaging thread with my own attemt.
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djellison
post May 30 2008, 07:54 AM
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If I had to guess what it was - I'd say something to do with...

-Biobarrier deployment
-SSI deployment
-Helium vent valve
-RA deployment
-Met deployment

If I had to pick one - Helium vent valve.
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um3k
post May 31 2008, 03:47 AM
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Sure looks like ice to me: http://fawkes3.lpl.arizona.edu/images.php?...1018&cID=26
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bcory
post May 31 2008, 04:18 AM
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QUOTE (um3k @ May 30 2008, 11:47 PM) *
Sure looks like ice to me: http://fawkes3.lpl.arizona.edu/images.php?...1018&cID=26


Looks more like a ice hockey pond ! ohmy.gif
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dvandorn
post May 31 2008, 04:57 AM
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Could be ancient duricrust, buried under a more recent dust/soil layer.

Could be pavement-flattened rocks of the type we see in Meridiani, again underlying a more recent dust/soil layer.

No. What am I thinking?

It's ice. It just looks *obviously* like ice. Maybe not a perfect layer of water ice, but at the very least a good, solid permafrost layer.

Looks like we'll need to burr some of that out, doesn't it? Looks really, really hard to me.

BTW -- is there a danger of significant sublimation of exposed water ice at these pressures and temperatures? I'd hate to see the cleared permafrost layer under the lander sublimate out into a nice little Phoenix-gobbling sinkhole... huh.gif

-the other Doug


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“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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ElkGroveDan
post May 31 2008, 05:35 AM
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QUOTE (um3k @ May 30 2008, 07:47 PM) *
Sure looks like ice to me: http://fawkes3.lpl.arizona.edu/images.php?...1018&cID=26


Holy cow, where's that swear jar?

This is the mission that keeps on giving.
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ElkGroveDan
post May 31 2008, 05:40 AM
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QUOTE (dvandorn @ May 30 2008, 08:57 PM) *
BTW -- is there a danger of significant sublimation of exposed water ice at these pressures and temperatures? I'd hate to see the cleared permafrost layer under the lander sublimate out into a nice little Phoenix-gobbling sinkhole... huh.gif


Dang I was thinking that same thing just as I read your post.

Probably not, since the blanket of dust and sand that has been keeping it all in place for eons would soon be replaced. If the patches under the lander started to slump they would gather nearby sand and dust. It would be covered before any significant slumping reached as far as the foot pads - I suspect. But it's a darn interesting thought to ponder.
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centsworth_II
post May 31 2008, 05:51 AM
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QUOTE (ElkGroveDan @ May 31 2008, 12:40 AM) *
But it's a darn interesting thought to ponder.

If that is exposed ice, what a time lapse movie that could make, watching its evolution over several months.
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James Sorenson
post May 31 2008, 06:24 AM
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OMFG Im gonna need that swear jar now rolleyes.gif.

It looks like the phoenix website was hacked.


EDIT: Now its back to normal, it said that it was hacked by vital.
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djellison
post May 31 2008, 08:36 AM
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The arm can't get to THAT Ice, the 'upper arm' is probably longer than the height from where the arm meets the deck to ground. But - you can see that where the dust blew away - it's everywhere. 5cm of soil, then ice. As they predicted (maybe smile.gif )

Doug
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Marcel
post May 31 2008, 08:59 AM
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QUOTE (dvandorn @ May 31 2008, 05:57 AM) *
BTW -- is there a danger of significant sublimation of exposed water ice at these pressures and temperatures? I'd hate to see the cleared permafrost layer under the lander sublimate out into a nice little Phoenix-gobbling sinkhole... huh.gif

-the other Doug


Could be a danger.

Another one. If it's ice: could the heat that the lander collects from sun radiation during daytime melt the ice under it's footpads ? ....slowly sinking in ? For rocks it doesn't seem to happen, the exposed surface of the whole lander (and the energy it collects) concentrates on quite small footpads though unsure.gif
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djellison
post May 31 2008, 11:15 AM
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Couple of RAC obs.
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