What OCX Was Supposed to Do

OCX was designed to replace the existing Architecture Evolution Plan (AEP), the ground control system that has commanded the GPS satellite constellation for decades. The new system was also meant to replace the Launch, Anomaly and Disposal Operations system.

The project’s core mission was to unlock the advanced capabilities of GPS III satellites, which are designed to be more jam-resistant and precise than earlier models. Specifically, OCX was needed to fully enable the encrypted M-Code signal for military users and to support the L5 civil signal.

Without OCX, the Space Force has never been able to fully tap into these enhanced capabilities, even with nine GPS III satellites already in orbit.

The Timeline of Failure

The project’s troubles were evident for years. OCX was originally expected to be completed in early 2016. By the time it was killed, it was approximately 10 years late.

In a critical development, the Space Force contractually accepted OCX from Raytheon (now RTX) in July 2025 following extended factory testing. This was followed by integrated testing to assess how the system performed across the broader GPS enterprise, including satellites, ground systems, and user equipment.

That integrated testing proved catastrophic for the program. According to Col. Stephen Hobbs, commander of Mission Delta 31, “extensive system issues arose during the integrated testing of OCX with the broader GPS enterprise.” He added that “despite repeated collaborative approaches by the entire government and contractor team, the challenges of onboarding the system in an operationally relevant timeline proved insurmountable”.

Officials discovered problems across a broad range of capability areas that they concluded would put current GPS military and civilian capabilities at risk if the system were transitioned to operations.

Why It Was Canceled

The formal cancellation was made by the Defense Acquisition Executive on April 17, based on the recommendation of acting service acquisition executive Tom Ainsworth. The Space Force stated the program “was unable to deliver needed capabilities on an operationally relevant timeline at an acceptable level of risk to meet the GPS constellation modernization needs”.

Ainsworth framed the decision as part of a broader acquisition reform effort. “It’s important we refine and update acquisition processes to prioritize rapid, incremental capability delivery versus complex ‘all or nothing’ system deliveries,” he said. “The Department of War has made clear that we need to deliver warfighting capability at a faster rate”.

An RTX spokesperson said the company “is aware of the U.S. Government decision regarding the GPS OCX program. Raytheon delivered the system in 2025 and has continued to support the U.S. Space Force in post-delivery activities. We remain committed to supporting our customers and will work closely with the government on the next steps”.

What Happens Now

Rather than continuing investment in OCX, the Space Force will pursue further incremental upgrades to the existing AEP system. Officials noted that AEP has received sustained improvements over the past decade, providing confidence that it can continue to support the GPS constellation and deliver new capabilities.

The Space Force recently awarded Lockheed Martin a $105 million contract to upgrade AEP for GPS III launch and checkout support through March 2030, suggesting Lockheed has the inside track on future ground system development.

Lockheed Martin also received a separate $114 million contract in September 2026 to upgrade GPS ground infrastructure to protect military signals from jamming and future threats. The majority of that funding, $96 million, is for upgrading existing ground systems to control the next-generation GPS IIIF satellites. Lockheed stated that these satellites will provide anti-jamming capabilities 63 times greater than previous generations.

Industry Reaction and Civilian Impact

The GPS industry was not surprised by the cancellation. At a recent Civil GPS Service Interface Committee meeting, the consensus among attendees was that the decision was long overdue, according to Dana Goward, president of the Resilient Navigation & Timing Foundation. However, concerns remain about what the cancellation means for the L5 civil signal becoming operational.

Lisa Dyer, executive director of the GPS Innovation Alliance, said it was time for the Space Force to prioritize ground system improvements that deliver measurable benefits to military, civil, commercial, and scientific users. She specifically noted eagerness to see GPS IIIF’s anti-jamming improvements and the L5 civil signal become operational.

For ordinary users of GPS—whether for navigation, banking transactions, communications, or utility infrastructure—the cancellation does not mean the system is broken. The 32 operational GPS satellites continue broadcasting signals, and the existing ground control system remains functional. The lost capability is primarily the ability to fully utilize the advanced features of the newest satellites, particularly encrypted military signals and the L5 civil signal.

A Cautionary Tale for Defense Acquisition

The OCX saga has become a case study in Pentagon acquisition failures. The program was flagged as a major “problem project” as early as 2016. By its cancellation, costs had exceeded the initial budget by 73%.

The decision to cancel OCX comes amid a sweeping push from top Department of Defense officials to pressure contractors on time and budget management. In January 2026, President Trump mentioned RTX by name in a Truth Social post criticizing its performance on key defense programs.

The termination leaves GPS modernization dependent on a ground control architecture that predates the GPS III satellite generation it was designed to operate. The implications for M-code expansion, anti-jam capability delivery, and next-generation timing services will be central questions for whatever successor effort emerges.