SMC, The Aerospace Corporation and The United Launch Alliance have spent many months preparing the space lift vehicle for this vital weather mission, the 51st in a long history of the DMSP program. DMSP satellites circle the Earth at an altitude of about 500 miles in a near-polar, sun-synchronous orbit. Satellites are three-axis stabilized and provide precision pointing to support mission sensors. The primary sensor on board is the Operational Linescan System that observes clouds via visible and infrared imagery for use in worldwide forecasts. Each scan covers an area 1800 miles wide and covers the entire Earth in about 12 hours. A second important sensor is the Special Sensor Microwave Imager Sounder, which provides all-weather capability for worldwide tactical operations and is particularly useful in typing and forecasting severe storm activity. The spacecraft also carries a suite of additional sensors, which collect a broad range of meteorological and space environmental data for forecasting and analysis.
The launch may also be viewed by webcast at www.ulalaunch.com.

