The power of HiRISE |
The power of HiRISE |
Oct 9 2008, 08:04 PM
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#101
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Busy preparing a new Outreach talk here, and have been trying to find some images to illustrate the "power" of HiRISE for a non-technical audience. Playing about with - sorry, carefully looking at the images on - the addictive Mars Global Data site I found a cute landslide on Xanthe Terra that does the trick nicely. Using the IAS Viewer you can zoom in on the boulders carried down the slope by the landslide and even see cracks and splits in them... unbelievable...!
Anyone else got any fave examples? -------------------- |
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Jan 19 2010, 10:02 AM
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#102
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
It actually helps - as is often the case with HiRISE images, I think - if you look at the black and white version first. Then it is clear that the boulders are "filling in the gaps" between the dunes...
(very cool dust ripple filled crater between the dunes there, don't you think?) The bright "stripe" along the top of the dunes appears to be the dunes' actual peak..? -------------------- |
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Jan 19 2010, 06:06 PM
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#103
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
(very cool dust ripple filled crater between the dunes there, don't you think?) here is a quick try at a single-image-SFS-DEM from the JPG above: Note that in this case the algorithm in its current implementation does have troubles with the extreme albedo differences between the blackish dunes and the light colored rock (i.e variations in brightness that are not caused by illumination only) which causes distortions in the low frequency variations ... Nevertheless the visual impression turned out quite interesting so I decided to post it anyway (and the vista does give a general idea on how this scene might look like when seen from the ground ) |
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