MSL Post First Drive - Intermission, Start of Drive to Glenelg, Intermission between CAP 1B and 2 - Sols 17 through 29 |
MSL Post First Drive - Intermission, Start of Drive to Glenelg, Intermission between CAP 1B and 2 - Sols 17 through 29 |
Sep 5 2012, 06:39 PM
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#241
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
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Sep 5 2012, 06:48 PM
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#242
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Folks, I am attempting to very briefly summarize each sol's activities on this page. The mission is getting better at posting frequent brief status reports, but my information for the first part of intermission is pretty sketchy. I'd appreciate it if people could email/PM with any corrections.
Speaking of updates, there's a teleconference planned for tomorrow. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Sep 5 2012, 07:48 PM
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#243
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
I see a dint in a wheel, I wonder if that was upon landing ?Original image We didn't notice any on the first drive. I actually see a couple of dents. Paolo -------------------- 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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Sep 5 2012, 07:55 PM
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#244
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set.
There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video. |
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Sep 5 2012, 08:16 PM
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#245
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Correcting for the actual camera model will be one of the next things to try Hmmm... seems like some of the panorama-makers here might be doing that--wonder if it's the full CAHVOR model or some approximation, or maybe some canned software. -------------------- |
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Sep 5 2012, 08:23 PM
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#246
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Member Group: Members Posts: 178 Joined: 13-September 05 Member No.: 498 |
Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set. There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video. I thought that initially too - that the gravity would be relatively high - but isn't the test (driving) rover specially lightened to compensate for that? I'm sure I remember reading that somewhere. It would make sense, especially for slip tests which could be influenced in either direction by not matching the ground force. My second thought was that the team will always put the test vehicle through much tougher circumstances than they would usually expect for Curiosity herself. |
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Sep 5 2012, 08:26 PM
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#247
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Junior Member Group: Members Posts: 31 Joined: 10-August 12 Member No.: 6526 |
Here's an interpretation of a MARDI image from sol 25:
Original: http://mars.jpl.nasa.gov/msl/multimedia/ra...mp;camera=MARDI Mark |
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Sep 5 2012, 08:26 PM
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#248
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
wonder if it's the full CAHVOR model or some approximation I was referring to the CAHVOR model (CAHVORE for the Hazcams). If CAHVOR is used in any of the off-the-shelf panorama tools I'm not aware of it, although I could be wrong. Edit: Maybe someone has taken the CAHVOR parameters and worked out parameters that work with the existing mosaicking tools? If so, that would be interesting to hear about. If I've heard about it in the past eight years with MER, I've forgotten. |
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Sep 5 2012, 08:44 PM
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#249
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
We didn't notice any on the first drive. But were the parts of the wheels facing down during landing (so perhaps dinged) imaged in the early days? In other words, do you expect to have seen any landing-dings? Presumably we can check the rotation phase of each wheel in the pre-first-drive images, and figure out whether these dings were facing down during landing... |
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Sep 5 2012, 09:19 PM
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#250
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Newbie Group: Members Posts: 8 Joined: 12-August 12 Member No.: 6548 |
Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set. There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video. No argument here. I just don't ever recall seeing any dings on the earth-bound MER wheels in all of their testing (tread scuffing perhaps). Whether due to scaling effects, wheel design or both, it seems we should expect to see more visible wear on the wheels than any seen on the MER rovers. |
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Sep 5 2012, 09:35 PM
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#251
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
but isn't the test (driving) rover specially lightened to compensate for that? The Scarecrow rover yes. http://www.flickr.com/photos/planetaryblog/7197573662/ VSTB, no. http://photojournal.jpl.nasa.gov/catalog/PIA15876 (Some of my own photos of the VSTB are here : http://dougellison.smugmug.com/Machines/Ma...9&k=ZnpCztC ) |
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Sep 5 2012, 10:53 PM
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#252
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
But were the parts of the wheels facing down during landing (so perhaps dinged) imaged in the early days? In other words, do you expect to have seen any landing-dings? Presumably we can check the rotation phase of each wheel in the pre-first-drive images, and figure out whether these dings were facing down during landing... On the first drive we rotated teh wheels 180 deg and took a mid-drive image exactly to inspect the area that was facing downward upon landing. I don't recall seeing any dents. Paolo -------------------- 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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Sep 6 2012, 12:28 AM
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#253
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Member Group: Members Posts: 128 Joined: 5-May 04 Member No.: 74 |
anybody knows whether there are any more teleconf planned? I have checked NASA TV schedules, but I can't find any Just announced one for tomorrow (Thursday), 10 am PDT, 1 pm EDT: http://www.jpl.nasa.gov/news/news.php?rele...p;msource=12276 |
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Sep 6 2012, 12:33 AM
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#254
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Junior Member Group: Members Posts: 22 Joined: 9-December 10 Member No.: 5551 |
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Sep 6 2012, 01:41 AM
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#255
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Member Group: Members Posts: 399 Joined: 28-August 07 From: San Francisco Member No.: 3511 |
Those dunes are starting to look majestic, can't wait for a real good view after Glenelg...
-------------------- 'She drove until the wheels fell off...'
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