Journey to Mt Sharp - Part 5: Into the Valleys, Sol 706-752, Aug 1-Sep 17, 2014 |
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Journey to Mt Sharp - Part 5: Into the Valleys, Sol 706-752, Aug 1-Sep 17, 2014 |
 Aug 3 2014, 12:23 PM
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#16
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Member  Group: Members Posts: 154 Joined: 21-April 05 From: Rochester, New York, USA Member No.: 336  |
I seems appropriate that Curiosity will be spending much of August on the beach.
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Aug 4 2014, 05:16 PM
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#17
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 Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I moved several wheel-related posts to the Monitoring wheel changes over time thread.
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Aug 4 2014, 08:10 PM
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#18
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Hmmm. Wondering if we're seeing another excessive slip event on sol 709. If it is, it doesn't look as excessive as the one back on sol 672.
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Aug 4 2014, 08:33 PM
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#19
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 Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
I suppose this will be the kind of view we have for a while...
 Sure makes you appreciate the usefulness of orbital imagery. |
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Aug 4 2014, 08:56 PM
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#20
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 Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
what is this little valley?
ancient riverbed? (will there be cobbles in the banks?) a rift? just wondering... -------------------- CLA CLL
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Aug 4 2014, 09:01 PM
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#21
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Senior Member Group: Members Posts: 2816 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
Sol 706
Hidden Valley Jan van Driel
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Aug 4 2014, 10:14 PM
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#22
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 Senior Member Group: Members Posts: 2425 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
QUOTE (elakdawalla @ Aug 5 2014, 04:10 AM)  Wondering if we're seeing another excessive slip event on sol 709. If it is, it doesn't look as excessive as the one back on sol 672. The drive distances published by Joe and Midnight Planets (MP) are rarely aligned as MP reports point-to-point movement, with Joe reporting the drive distance using NAIF wheel turn data that includes donuts during the drive. Looking at the images we have so far, the sol 709 drive appears straight with one partial donut (turn) at the beginning of the drive. Comparing the distances 14.1m by MP and 26m from Joe along with the spacing of the marks left by the cleats in the wheel track it appears we have had some slip, but apparently not enough to trigger a halt in the drive which looks like good news for a traverse through these valley systems. I note that this drive took the rover closer to the southern wall of the valley, HiRISE images suggest the ripples are smaller on that side of the valley I wonder if they would offer less slip? Or it could just be that the southern wall is not as steep as the north wall and could be used to exit the floor if required. |
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Aug 4 2014, 11:09 PM
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#23
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Part of this press release sounds almost like the announcement of a waypoint:
QUOTE ...an appetizer outcrop of a base layer of the mountain lies ... less than one-third of a mile (500 meters) from Curiosity. The rover team is calling the outcrop "Pahrump Hills." ...
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Aug 4 2014, 11:21 PM
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#24
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Hmmmmm. I'd buy that. "Appetizer" sounds like they're thinking about eating something
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Aug 5 2014, 12:22 AM
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#25
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Solar System Cartographer Group: Members Posts: 10145 Joined: 5-April 05 From: Canada Member No.: 227 |
My interpretation of the final waypoint from the original waypoint map was that it was on this same valley floor unit, so I think this may just be the first exposure of the same unit along this new path.
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 5 2014, 01:31 AM
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#26
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 Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Check the speed plot from this drive--it looks like maybe slip detection kicked in at t=1850. The way I'm interpreting such data anyway is that spikes of more than a few cm/sec represent slip, and those usually occur (if they do) at the beginning of a drive pulse (makes sense I guess). Usually the slip is short-lived and the rover continues forward but at 1850 there's no action after the big pulse of 45 cm. That's still just a fraction of a rotation of the wheel. But then it seems to proceed OK. There was some zig-zagging at the end, at least according to the raw SPICE data:
Never sure how much to take that as gospel though. -------------------- |
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Aug 5 2014, 01:49 AM
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#27
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Solar System Cartographer Group: Members Posts: 10145 Joined: 5-April 05 From: Canada Member No.: 227 |
A very rough circular view to get our current 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 5 2014, 09:27 AM
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#28
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
QUOTE (jmknapp @ Aug 5 2014, 03:31 AM) Check the speed plot from this drive--it looks like maybe slip detection kicked in at t=1850. The time for the pause seems to match with this NavCam Left B image. So I'm considering, that the stop (at t=1850) has been intentional to do some imaging. The last driving phase took about 600s, like the one before. This gives me some hope, that the termination of the drive hasn't been triggered by slipping, presuming periodic imaging stops. But when looking at the right front wheel (driving backward), there may be an augmented risk of excessive slippage. |
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Aug 5 2014, 11:50 AM
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#29
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
One of the Sol 708 MARDIs in an enhanced version, to provide a look to the ground:
 (and to indicate, how beautiful MARDIs can look, sometimes) |
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Aug 5 2014, 05:30 PM
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#30
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Member Group: Members Posts: 201 Joined: 16-December 13 Member No.: 7067 |
Sol 706 NavCam during wheel inspection - watch the lengthening shadows
709 drive into the valley   looks really nice as an anaglyph_____________________________________________________________________________ EDIT: 710 is starting to come down Backing up from the Rear HazCams - Anaglyph version |
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