Staff Sgt. Jack Cotham observes data from a weather surveillance radar doppler screen Feb. 11, 2010 at Kunsan Air Base, South Korea. Weather Surveillance Radar, 1988, Doppler is commonly called Doppler radar and detects precipitation and atmospheric movement or wind. Sergeant Cotham is a 8th Operation Support Squadron weather forecaster. (U.S. Air Force photo/Senior Airman Roy Lynch)