The Global Positioning System (GPS) is a U.S. space-based global navigation satellite system. It provides reliable positioning, navigation, and timing services to worldwide users on a continuous basis in all weather, day and night, anywhere on or near the Earth which has an unobstructed view of four or more GPS satellites. GPS is made up of three segments: Space, Control and User.
The 50th Space Wing (50 SW) is a wing of the United States Air Force under the major command of Air Force Space Command (AFSPC). It was activated on 30 January 1992, replacing the 2d Space Wing, which was deactivated on the same date. The unit is the host wing at Schriever Air Force Base, located east of Colorado Springs, Colorado. Their primary responsibility is to track and maintain the command and control, warning, navigational, and communications satellites for AFSPC.