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Goes West - Western US Regional Satellite Directory 2

Billings, Montana Boise, Idaho Elko, Nevada Eureka, California
Billings, Montana U.S. Thumbnail Boise, Idaho U.S. Thumbnail Elko, Nevada U.S. Thumbnail Eureka, California U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
 
 
Flagstaff, Arizona Glasgow, Montana Great Falls, Montana San Joaquin Valley, CA
Flagstaff, Arizona U.S. Thumbnail Glasgow, Montana U.S. Thumbnail Great Falls, Montana U.S. Thumbnail San Joaquin Valley, California U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
 
Las Vegas, Nevada Los Angeles, California Medford, Oregon Missoula, Montana
Las Vegas, Nevada U.S. Thumbnail Los Angeles, California U.S. Thumbnail Medford, Oregon U.S. Thumbnail Missoula, Montana U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
 
 
Pendleton, Oregon Phoenix, Arizona Pocatello, Idaho Portland, Oregon
Pendleton, Oregon U.S. Thumbnail Phoenix, Arizona U.S. Thumbnail Pocatello, Idaho U.S. Thumbnail Portland, Oregon U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
 
Reno, Nevada Sacramento, California Salt Lake City, Utah San Diego, California
Reno, Nevada U.S. Thumbnail Sacramento, California U.S. Thumbnail Salt Lake City, Utah U.S. Thumbnail San Diego, California U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
 
 
San Francisco, California Seattle, Washington Spokane, Washington Tucson, Arizona
San Francisco, California U.S. Thumbnail Seattle, Washington U.S. Thumbnail Spokane, Washington U.S. Thumbnail Tucson, Arizona U.S. Thumbnail
VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG VIS  | AVN  | WV  | FOG
Enhancement Descriptions
Abbreviation Full Name Description
♣  VIS Visible Unenhanced Visible imagery that transitions to IR2 overnight.
♣  AVN Aviation
Aviation color enhancement satellite where colors are designated with how cold the clouds are.
♣  WV Water Vapor
Shows the movement of water vapor moisture in the upper and middle level of the atmosphere.
♣  FOG FOG
The vis/fog satellite images are generated from visible geostationary satellite images and is enhanced by brightness during local daylight hours, and from a derived "fog" image at night that emphasizes the low clouds.

During the day the visible image is brightness normalized by dividing by the cosine of the solar zenith angle. This removes most of the image dependence on sun angle, such as brightness changes at sun rise and sun set and differences between winter and summer image brightness. The visible brightness depends primarily on the thickness of the cloud. The visible image is used when the sun is higher than 3 degrees above the horizon.

At night there are no visible images, so a derived "fog" image is substituted for the visible. The "fog" image is generated from the temperature difference between the 3.7 micron images and the 11 micron infrared images.




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