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Jan 6 2006, 08:55 PM
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
ADMIN NOTE: Please note that this topic was unavoidably poltical before the 'No Politics' rule. Please restrict future comments to the mission/spacecraft/news updates etc.
WHAT'S NEW Robert L. Park Friday, 6 Jan 06 Washington, DC DEEP SPACE CLIMATE OBSERVATORY KILLED. http://bobpark.physics.umd.edu/index.html -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Nov 1 2016, 03:29 PM
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Senior Member Group: Members Posts: 4251 Joined: 17-January 05 Member No.: 152 |
The symmetry of the Rayleigh phase function tells us one more interesting thing. Neglecting the subdominant light scattered or reflected from the water, the intensity of the ocean (near the centre of the disk but away from the sun glint) seen from space with the sun roughly behind your back would be similar to the Rayleigh-scattered intensity of the sky (away from the horizon) from the ground (near sea level) when the sun is high. Of course getting into the (mainly forward-scattered) Mie regime spoils this and will make the sky from the ground generally brighter than the ocean from above.
But basically the intensity of the sky near noon on the clearest, least dusty day would be similar to the intensity (and colour) of the ocean when viewing the full Earth from above. For those of us who aren't going to make it into space, at least we can imagine a bit more quantitatively now! |
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Lo-Fi Version | Time is now: 5th June 2024 - 08:36 AM |
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