DSCOVR |
DSCOVR |
Jan 6 2006, 08:55 PM
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#166
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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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Oct 29 2023, 10:05 PM
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#167
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Senior Member Group: Members Posts: 1645 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Interesting to see this document that seems to be associated with their color processing improvements from a few years ago. Good to see they mention the CIE color processing. In the past the H5 file images weren't corrected yet for Earth's rotation as can be seen in the image from two posts up. I wonder if this is newly being done in the H5 file or in another version of the files shown, or simply later on in their processing for the L1b and web images?
The "brown eclipse" issue may stem from a lack of eclipse support in Rayleigh corrections employed with both DSCOVR and GOES image processing. An alternative to the Rayleigh correction the DSCOVR team is using could be a logarithmic interpolation between the observed bands to construct the full spectrum as I've been considering in the context of sky simulations. Yes I try to account for solar limb darkening when simulating eclipses, from space-based and ground-based or high-altitude views. The DSCOVR perspective view simulation is something I'm ironing out at present - here is a first look based on land surface and 3D atmospheric analysis data fully independent of DSCOVR. -------------------- Steve [ my home page and planetary maps page ]
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