MSL statistics, Odometry progress and other figures |
MSL statistics, Odometry progress and other figures |
Sep 6 2012, 05:37 PM
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#1
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
After first month on Mars, I think it's time to start a topic similar to MER one...
First odometry plot to start: -------------------- I always think before posting! - Marco -
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Apr 1 2014, 03:55 PM
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#2
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Are you familiar with the coastline paradox? http://en.wikipedia.org/wiki/Coastline_paradox
There are so many error sources for odometry that it may not be physically meaningful to even discuss the "true" value. Even figuring out where the rover is at any given moment isn't free of ambiguity. I think you're doing a great job with the data you have. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Apr 1 2014, 09:05 PM
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#3
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Are you familiar with the coastline paradox? http://en.wikipedia.org/wiki/Coastline_paradox Yes! Benoit Mandelbrot's book had a chapter titled "How Long is the Coast of Britain" and the answer was: infinite, if you use a small enough ruler. It's more important for me to keep the map position more or less right, because when it deviates I definitely start getting emails. And now the rover is poised to travel beyond the bounds of my initial HiRISE map tiles. I'm working to add another set of tiles--hopefully it'll be done before the rover moves much further, now just a couple hundred meters from the edge. "There be dragons!" -------------------- |
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Apr 2 2014, 04:03 PM
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#4
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
It's more important for me to keep the map position more or less right, because when it deviates I definitely start getting emails. I don't know how the SPICE location is updated with information from outside the rover system. The rover basically can't know its absolute location in the Mars frame all by itself to good accuracy over a long time scale. The team uses map products that have the current site as the origin, so we never really use the SPICE location for anything in absolute terms as far as I know. Then there's the question of how well the orbital mosaic was georectified in the first place. All in all, I suspect that putting the location on a map in an automated fashion using just the SPICE would be difficult, if not impossible (but I haven't really tried it, so I can't be sure.) -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Apr 9 2014, 04:25 PM
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#5
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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Apr 18 2014, 05:57 AM
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#6
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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May 16 2014, 05:20 PM
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#7
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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May 27 2014, 04:53 AM
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#8
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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