The ground systems that U.S. Space Force satellites need to do their jobs are evolving to have more in common with cell phones that can run apps from made by anyone. An open source architecture for the command and control systems allows the military to roll out new software, capabilities and updates faster and cheaper, with the ultimate goal of ending stovepiped setups to process data for separate satellites. C4ISRNET will check on progress with a leading prototype project to test this agile approach for missile warning satellites, as the Space Force works toward a common C2 ground service for all of its space systems.