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Atlas of Cloud-Free Line-of-Sight Probabilities. Part 3. United States of America.
Air Force surveys in geophysics,
AIR FORCE GEOPHYSICS LAB HANSCOM AFB MASS
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This is the third part of a planned Northern Hemisphere atlas of probabilities of cloud-free lines-of-sight between the earth and space. The probabilities are for the mid-season months January, April, July, and October four times of day 0000-0200 LST, 0600-0800 LST, 1200-1400 LST, and 1800-2000 LST and three elevation angles 10, 30, and 90 degrees. Parts 1 and 2 depicted cloud-free line-of-sight probabilities for Germany and the USSR respectively. Author
APPROVED FOR PUBLIC RELEASE