Boeing completed a live demonstration of the GPS ground station, which when fully operational will control the GPS constellation, the company announced Jan. 4.

Boeing is under contract to migrate the current GPS ground control system, known as the Architecture Evolution Plan (AEP), to a distributed Unix-based system beginning in Apri
l.
The AEP conducted a three-hour contact of a Block 2R satellite in the new Master Control Station at Schriever Air Force Base, Colo., sending test commands and navigation updates while verifying contents of the satellite’s memory and monitoring its return telemetry.