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