May 23, 2007, HiRISE release |
May 23, 2007, HiRISE release |
Guest_AlexBlackwell_* |
May 23 2007, 04:01 PM
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May 26 2007, 11:30 AM
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Member Group: Members Posts: 111 Joined: 14-March 05 From: Vastitas Borealis Member No.: 193 |
While I don't know, let them answer, in that very report:
QUOTE However, a fortunate MOC observation of Dena at ~2 p.m. (R0800159) actually does show an illuminated floor, allowing us to tightly constrain the depth using a 1-D photoclinometry routine. This routine returns a depth of ~130 m for the illuminated floor, while the minimum depth estimated from the THEMIS observation is only ~80 m. Because THEMIS IR observes at 100-m resolution, cavern skylights with diameters much smaller than that are probably not thermally distinguishable from regular temperature variations on the surface (The last paragraph also explains why the possible new skylight in S0901483 has not been observed with THEMIS, it evidently and perceivably being less than 100 m in diameter.) |
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Lo-Fi Version | Time is now: 26th September 2024 - 01:27 AM |
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