MRO-HiRISE, interesting images |
MRO-HiRISE, interesting images |
Mar 29 2016, 12:03 AM
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
last Friday Phil Plait over on " Bad Astronomy "
posted a cool image http://www.slate.com/blogs/bad_astronomy/2...dune_field.html it took the weekend to process all 18 HiRISE red ccd images into one mapped image ( 1.3 gig ) then run a SFS on it , well a crop but still 8192x8192 image reduced size ( 2048x2048 mesh ) test renders in Blender |
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Jan 15 2017, 04:28 PM
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Interesting question Sean. For a ballpark answer I would suggest that we can estimate an overall optical depth tau (~0.5) and dust scale height of 11km. This means the extinction coefficient at elevations near the ground would be 0.5/11km or 4.55 * 10^-5 m^-1 (tapering off exponentially as we go upward). From this both the inscatter and outscatter can be determined in the path between the observer and point on the terrain.
The impact might be subtle in the foreground, though becoming more noticeable for distant features in the background when looking near the sun. -------------------- Steve [ my home page and planetary maps page ]
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