Pentagon Cancels Troubled GPS Ground Control System After 16 Years of Failures

The U.S. Department of Defense has officially canceled the Global Positioning System Next-Generation Operational Control System (OCX), a ground control system for the military’s GPS satellite network, after years of unresolved technical and budgetary challenges. The decision was announced by the U.S. Space Force in a press release on Monday, following the termination of the program by Michael Duffey, the Pentagon’s defense acquisition executive, on Friday, April 17, 2021.

The OCX program was a 16-year, multibillion-dollar effort to develop a modern command and control system for the U.S. military’s GPS satellite constellation. The system was intended to support new signals from the latest generation of GPS satellites, GPS III, which began launching in 2018. The OCX program included:

• Software to manage new GPS III satellite signals
• Two master control stations
• Modifications to ground monitoring stations worldwide

The cancellation marks the end of a program plagued by repeated delays, cost overruns, and technical failures. The OCX system was originally projected to cost $3.7 billion but saw its budget balloon to over $8 billion due to ongoing issues. The program’s persistent problems were deemed “insurmountable” by Pentagon leadership, according to the Space Force’s announcement.

The termination of OCX leaves the U.S. military’s GPS infrastructure without a next-generation ground control system, raising questions about the future of GPS III satellite operations. The existing GPS control system, known as the Architecture Evolution Plan (AEP), remains in use but lacks the advanced capabilities planned for OCX.

The decision to terminate the OCX program ends a 16-year, multibillion-dollar effort to design, test, and deliver a command and control system for the military's constellation of GPS navigation satellites.