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Mobility reports, Making maps
djellison
post Apr 6 2006, 03:56 PM
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This one's for those with bandwith and a penchent for data only smile.gif

http://anserver1.eprsl.wustl.edu/anteam/merb/merb.htm

Great data sets - but I just grab the course.png which shows the path of the vehicle on that days drive - great

NOW - here's the problem - they're not matching up properly...i.e. I've been tracing the route around the edge of Endurance, and Sol 129 I should be right next to tracks from about 20 sols before when the rover headed out the other way. Somewhere, they've got out of line with one another.

Are all sites defined with X, Y and Z being in the same direction - or does a new site define a new set of axis for motion thereafter - and what am I missing to fall short of having these things match up. I don't THINK it's slipage etc - but perhaps it is. I don't know

Doug
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Nix
post Apr 6 2006, 04:38 PM
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I think there is a 'local coordinate system' for every new site. could be wrong though.

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SteveM
post Apr 6 2006, 04:57 PM
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QUOTE (djellison @ Apr 6 2006, 10:56 AM) *
This one's for those with bandwith and a penchent for data only smile.gif

http://anserver1.eprsl.wustl.edu/anteam/merb/merb.htm

Great data sets - but I just grab the course.png which shows the path of the vehicle on that days drive - great

There seem to be several steps between the link you gave and the course.png files you mentioned. Could you give some help for navigating around the site to those files?

QUOTE
NOW - here's the problem - they're not matching up properly...i.e. I've been tracing the route around the edge of Endurance, and Sol 129 I should be right next to tracks from about 20 sols before when the rover headed out the other way. Somewhere, they've got out of line with one another....

Doug

The positions on the Traverse Maps on the Analyst's Notebook "are taken from Rover Vector Files and have not been corrected for wheel slip." I suspect that other position data at the PDS may suffer from the similar problem, which would account for your problem.

I couldn't find the bundle adjusted Rover positions from Li's team at Ohio State anywhere in the PDS -- of course since they originally planned to do a new complete bundle adjustment every few days, they may be holding off until they can pull it all together, yet interim reports would be helpful.
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Phil Stooke
post Apr 8 2006, 05:14 PM
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Doug, I'm replying to a question from you about the digital scale of my Endurance mosaic - couldn't find the original question. I didn't make it at a specific scale, but of course it can be resampled to a specific m/pixel scale as needed. I think the area covered is about 200 m across. I can't go back into it yet to do anything specific - too busy.

Phil


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