OCX nears full operational integration

The U.S. Space Force’s Space Operations Command has accepted a modernized operating system for GPS, designed to maintain the resiliency of the constellation and enhance positioning, navigation and timing (PNT) services to meet evolving user demands.

The GPS Next Generation Operational Control System (OCX) upgrade is part of a broader set of Space Systems Command acquisition programs designed to deliver a range of modernized capabilities across the GPS III enterprise. In addition to OCX, these programs include the GPS III/IIIF satellite vehicles and Military GPS User Equipment.

The modernization effort is expected to improve signal access in electronically contested environments, increase the system’s ability to detect failures, enhance position and time transfer accuracy, and strengthen the integrity and uninterrupted availability of the Military Code.

“One of our missions is to deliver sustained, reliable GPS capabilities to America’s warfighters, our allies, and civilian users,” said Cordell DeLaPena, program executive officer for military communications and PNT at Space Systems Command. “The current enterprise modernization efforts underway give users confidence that GPS will continue to provide worldwide premier PNT service.”

Mission Delta 31, in partnership with Space Systems Command, developed a systematic process involving transition exercises, rehearsals and constellation transfer trials to verify the system’s integrity and capability prior to full transfer, according to Col. Stephen Hobbs, commander of Mission Delta 31. Hobbs added that risk reduction activities are underway to demonstrate OCX’s ability to integrate with existing, on-orbit GPS satellites.

Raytheon initiated the delivery of OCX to the U.S. government with the submission of the Department of Defense Form 250 on July 1, 2025. Following acceptance, Mission Delta 31 will continue integrated systems testing, operational readiness exercises and preparations for the eventual transfer of the GPS constellation to the new system.

“Testing and transition events will continue until the system is ready to transfer to operations, which is expected in late 2025,” said Hobbs. “Technology in space is advancing at lightning speed, with many new players from around the world. To continue providing reliable GPS for everyone, from your smartphone map to critical military operations, innovation is vital. Modernizing GPS is key in maintaining this essential service and remaining a leader in Space.”