General Dynamics Mission Systems, in partnership with Iridium, has been awarded a $491.6 million contract by the Space Development Agency (SDA) to design, analyze, and develop an integrated ground system for their Ground Management and Integration (GMI) program. Building on their previous success with the Tranche 1 Operations and Integration contract, General Dynamics will expand the ground system architecture to support the development of future tranches of the Proliferated Warfighter Space Architecture (PWSA).