Ceres Geology |
Ceres Geology |
Jan 22 2014, 06:14 PM
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#1
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Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
Paper out tomorrow: http://www.bbc.co.uk/news/science-environment-25849871
Very exciting that we will visit this world soon! |
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Mar 19 2015, 03:04 PM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Great find on the DEM -- I'm really surprised to see it released!
If a DEM is calculated from image pairs, I think positional accuracies are no better than some small number of pixels, right? Which is to say it's not really worthwhile to use this one to analyze the detailed rim and floor structure of the crater that the bright feature is in. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 19 2015, 04:23 PM
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#3
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Member Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 |
If a DEM is calculated from image pairs... I'm not sure how these DEMs were produced, but in principal all the images from the rotation sequence could contribute simultaneously to the DEM, potentially yielding sub-pixel resolution of the topography. Also, the shadowing along the terminator might contribute further. Or it could be all shape-from-shading, in which case take with a grain of salt. Tracking common features in multiple images is tricky and error prone. Anyway, I agree that the bright spots are indeed so poorly resolved that I'd hesitate to make much of their DEMs. |
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