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Sol 22 and after, Digging in Wonderland
Phil Stooke
post Jun 17 2008, 03:07 PM
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Here's a Sol 22 image of the new trenching area at the extreme right edge of the work area. I brightened the shadow to show the whole trench.

Phil

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... because the Solar System ain't gonna map itself.
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MahFL
post Jun 17 2008, 03:35 PM
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Nice, I was just looking at the pictures.

I noticed they dumped a scoop full at the far end of the trench rather than somewhere else, any one have any thoughts on why ?
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Tman
post Jun 17 2008, 05:08 PM
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Further shots on this (additional the RGB)

http://www.greuti.ch/phoenix/of_SS022EFF_12CA8_RABC.jpg
http://www.greuti.ch/phoenix/of_SS022EFF89...7_12CAEL1M1.jpg


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ugordan
post Jun 17 2008, 06:08 PM
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My color version of the new trench. Merged two red filter images that each seemed to show less compression artifacts in sunlit/shadow portions of the image, respectively.


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centsworth_II
post Jun 17 2008, 06:10 PM
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No sign of the white stuff at the same depth as on the edge of the polygon. Interesting.
Maybe one more centimeter down?
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Pando
post Jun 17 2008, 07:01 PM
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To me, it looks like the tool has scraped across a flat hard surface...
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imipak
post Jun 17 2008, 07:55 PM
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Interesting large cracks in the surface to the right of the trench; it looks like a thick surface crust breaking up into large chunks as the scoop passes nearby. Anyone know if there's telemetry from the arm indicating how much effort was needed at different points of the scoop manoeuvre? And it does appear to be the more deeply shadowed area where this happens. Fascinating stuff!


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Stu
post Jun 17 2008, 10:18 PM
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Quick look...

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Astro0
post Jun 17 2008, 11:30 PM
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If you haven't seen it yet, check out the raw images page from Mark Lemmon.
Next to the Sol links, they've included a little description for the day's activities.
Some of it makes very amusing reading.
Well done Mark!

Sol 000 Land
Sol 001 Start looking around
Sol 002 Runout
Sol 003 Look around more, unstow RA
Sol 004 Finish unstow RA
Sol 005 Document Queen of Hearts
Sol 006 Image RA touch, TEGA prep, workspace
Sol 007 Dig! (well, test sample)
Sol 008 Document TEGA, OM prep; image workspace
Sol 009 Document sample site
Sol 010 Runout
Sol 011 Sample for TEGA
Sol 012 Bury TEGA
Sol 013 Find missing spring to go with found spring
Sol 014 Get ready to bury MECA
Sol 015 Sprinkle gently on MECA
Sol 016 MRO/PHX coordinated observations
Sol 017 Deliver to MECA
Sol 018 Strip mine Dodo
Sol 019 More digging, dislodge interesting fragment
Sol 020 Continue dodo trenching, wantonly destroy fragment
Sol 021 Atmosphere sol
Sol 022 Open up Wonderland for exploration
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fredk
post Jun 18 2008, 04:16 AM
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QUOTE (ugordan @ Jun 17 2008, 06:08 PM) *
My color version of the new trench.

This appears to be the best-defined trench yet, probably because they haven't hit the substrate yet. But the trench floor is clearly heterogeneous, with well-defined regions that are either a lighter shade or a darker shade of the ubiquitous Martian hue. Obvious speculations include grain size or compositional differences between the two types of soil. I wonder if the scoop would be agile enough to sample the lighter and darker regions separately...
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centsworth_II
post Jun 18 2008, 06:39 AM
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QUOTE (Pando @ Jun 17 2008, 02:01 PM) *
To me, it looks like the tool has scraped across a flat hard surface...

Hard to tell if the smooth sections are a hard material scraped smooth or a soft material smoothed flat.
But it looks pretty clear that there is no white material...yet.
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n1ckdrake
post Jun 18 2008, 07:55 AM
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Updated in post #76
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Skyrunner
post Jun 18 2008, 09:19 AM
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QUOTE (imipak @ Jun 17 2008, 09:55 PM) *
Anyone know if there's telemetry from the arm indicating how much effort was needed at different points of the scoop manoeuvre?

I haven't got the telemetry, but it's there. Every 200msecs during operation the arm reports telemetry of which only a part is:
  • Motor current
  • Motor voltage
  • Joint angles

And so the amount of joint work, and thus joint torque, can be worked out for any part of the digging operation. Actually, telemetry is returned because according to the RA team it is "... most useful for scientific analysis during digging and soil-mechanic experiments. The motor currents, along with the reconstructed arm trajectories will yield information regarding the degree of difficulty of digging in the various soils encountered..."

This data will be archived in the PDS.


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Error: Life.sys corrupted
( R )eflect, ( R )epend, or ( R )eboot?
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Tomek
post Jun 18 2008, 09:40 AM
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Greetings
On this picture I can see the first layer which probably is green or denitely have a diferent colour .



The same was posible to see in the first digging area but it is my opinion that the first layer is green and is wery thin .
In the Meca images was also seen some green sand particles .
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ugordan
post Jun 18 2008, 10:21 AM
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I'm not convinced that's actually green. We'll have to wait for calibrated images, but my guess now would be it's an artifact of the raw images and that it's actually more grayish in color than the rest of the soil.


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