Beyond Lewis and Clark Gap, Sol 4482- (September 2, 2016-) |
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Beyond Lewis and Clark Gap, Sol 4482- (September 2, 2016-) |
 Mar 27 2017, 05:02 PM
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#211
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 Senior Member  Group: Members Posts: 2919 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682  |
I understand now why the original route goes (also) near the fresh crater, steepless route.
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Mar 28 2017, 12:57 AM
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#212
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 Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
QUOTE (Floyd @ Mar 27 2017, 09:22 AM)  Opportunity's solar panels look like wings of a squirrel suit, but do you think they will be any good for base jumping? Opportunity and Spirit's solar panel wing shape has always reminded me of the wings of a B-2 Stealth bomber. I wouldn't try base jumping to try it out though....I heard somewhere awhile back that because of it's stereo vision based autonomy, You can send a command to tell it to drive off a cliff and Oppy will detect the cliff and stop or ignore the command all together. It will try and find away around it and if it can't, will stop and wait for further instructions. If autonav was disabled though, could be possible I suppose? Paolo or Doug? Of coarse I'm not suggesting anything... |
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Mar 28 2017, 02:32 AM
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#213
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Yup - you can set tilt limits (that would get triggered early off a cliff) - every drive gets those. If AutoNav is on, it would see something like that as a hazard and stop - depending on what parameters you gave it.
I think this was simply a blind drive to the edge of the previous NavCam mesh though. That's what usually gets you the most bang per buck (meters per Whr) D |
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Mar 30 2017, 11:21 AM
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#214
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Senior Member Group: Members Posts: 2819 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The Navcam L0 view on Sol 4682-4683.
Jan van Driel
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Mar 30 2017, 03:05 PM
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#215
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 Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
QUOTE (James Sorenson @ Mar 27 2017, 04:57 PM) Opportunity and Spirit's solar panel wing shape has always reminded me of the wings of a B-2 Stealth bomber. I wouldn't try base jumping to try it out though....I heard somewhere awhile back that because of it's stereo vision based autonomy, You can send a command to tell it to drive off a cliff and Oppy will detect the cliff and stop or ignore the command all together. It will try and find away around it and if it can't, will stop and wait for further instructions. If autonav was disabled though, could be possible I suppose? Paolo or Doug? Of coarse I'm not suggesting anything... I don't think you would be able to pick up Oppy from the wings, they are pretty flimsy. You can pick it up from the portion of the deck that is on top of the WEB. In fact the SSTB1, the testbed at JPL has loops there for a crane to pick it up in sase we need to lift it. The vehicle has an IMU (Inertial Measurement Unit) a 3-axis accelerometer and gyro that report the vehicle attitude 8 times a second. We ALWAYS set max tilt limits, sometimes we set pitch or roll limits, but a bit more often Northerly Tilt limits (tilt towards the North or South). Both MER and MSL have the same IMU, a Litton LN200. MER's are slightly better than MSLs but either vehicle need to periodically reset the IMU to cancel out gyro drift. MER calls it GFA/QFA (Get Fine Attitude, Quick Fine Attitude) MSL calls it Sun Find but the procedure is quite similar: using the Sun position at a given time and the accels output to measure the nadir vector the procedure resets the North/East/Down coordinate system. We also set Suspension limits. The vehicle monitors the position of the rocker/bogie to see if the terrain does not match what we expect. Paolo PS: i always saw MER shape more like a fruit fly. -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Mar 31 2017, 02:21 PM
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#216
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Senior Member Group: Members Posts: 2819 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The Pancam L2 view on Sol 4686.
Jan van Driel
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Apr 2 2017, 02:55 PM
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#217
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Senior Member Group: Members Posts: 2819 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
Thw Navcam L0 panoramic view on Sol 4686-4687.
Jan van Driel
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Apr 3 2017, 08:23 PM
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#218
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Senior Member Group: Members Posts: 2819 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The Navcam L0 view on Sol 4688-4689.
Jan van Driel
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Apr 4 2017, 02:15 AM
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#219
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Solar System Cartographer Group: Members Posts: 10149 Joined: 5-April 05 From: Canada Member No.: 227 |
Jan's panorama reprojected to show the view down the slope.
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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Apr 5 2017, 07:28 PM
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#220
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 Senior Member Group: Members Posts: 1083 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
Sol 4690 in color...
A nice late afternoon view with long shadows. Enjoy 
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Apr 5 2017, 08:57 PM
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#221
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
Beautiful! Great job.
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Apr 5 2017, 09:16 PM
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#222
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
Wonderful Oliver!
Here is my version's  False color: 
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Apr 5 2017, 09:28 PM
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#223
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Newbie Group: Members Posts: 17 Joined: 8-September 15 Member No.: 7773 |
There is a whiter elevation near the crater Ridge. Is it interesting? Is it an impact remnant or is it related to a geological difference?
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Apr 5 2017, 10:09 PM
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#224
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
It is likely just a mound of bright oxide dust, maybe with some of the flat sulfate rock that we see all over as well. At this point, it doesn't look all that interesting. Some pancam super-res imaging of it occurred on Sol-4691 for a better look at it.
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Apr 5 2017, 10:53 PM
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#225
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
Will not compare to PDS images, but here the pancam stack of the mound. Minor detail increase, but more detail should be brought out in the Non-JPEG images.
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