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Jan 6 2006, 08:55 PM
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#101
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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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Jul 20 2018, 07:23 PM
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#102
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
With some further adjustments I get this comparison that is hopefully a bit closer, including a slightly darker blue over the oceans. The land is now brighter relative to the scattered light in the atmosphere.
The ocean/sky blue is brighter in the image one post above for perhaps multiple reasons. One way to characterize this gap is to note that the simulated 551nm reflectance in the darkest ocean areas is about 4.4% compared with 5.0% observed. The blue channel and color saturation are also higher in the above post. The same dark ocean areas are observed to have ~12.4% reflectance at 443nm and the simulation has a lower value. This gap can be bridged by considering reflected sunlight from beneath the water surface, and also checking the reflected skylight from the surface. -------------------- Steve [ my home page and planetary maps page ]
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