After more than 15 years of development, billions of dollars in spending, and repeated schedule failures, the U.S. Air Force has pulled the plug on its Next Generation Operational Control System, the GPS ground control modernization program known as OCX. The cancellation, confirmed in spring 2026, forces the military to rely on an aging interim system that was never designed to serve as a permanent solution, and it leaves the command backbone of the world’s most widely used satellite navigation network without a clear path to modernization.
RTX, the defense conglomerate formerly known as Raytheon Technologies, served as prime contractor on OCX from the program’s inception. The company won the original contract (FA8807-10-C-0001) in 2010 with a mandate to build a ground control system capable of managing the next generation of GPS III satellites, hardening operations against cyberattacks, and delivering more accurate and resilient signals to military and civilian users worldwide.
That mandate was never fulfilled. What followed instead was one of the Pentagon’s most prominent acquisition failures in recent memory.
A pattern of warnings ignored
The trouble with OCX did not emerge suddenly. The Government Accountability Office flagged serious schedule risks as early as 2019, concluding in its assessment (GAO-19-250) that further delays were likely and that post-acceptance developmental testing could push delivery well beyond the Air Force’s targets. That report applied the GAO’s own analytical framework to the program’s timeline rather than simply accepting the contractor’s projections, and its warnings proved prescient.
The 2019 assessment was not an isolated alarm. The GAO had scrutinized OCX in multiple prior reviews, each time finding that cost growth and schedule slippage were worsening. Congressional oversight committees echoed those concerns in hearings and written reports, though specific statements from individual lawmakers criticizing the program have not been independently verified against primary transcripts for this account. Despite the accumulating warnings, funding continued to flow.
A Department of Defense contracts notice dated May 22, 2025, recorded a modification (P00454) valued at $379,779,763 under the original OCX contract. That single action, one of dozens over the program’s life, shows the government was still committing hundreds of millions of dollars to OCX less than a year before cancellation. Prior DOD Selected Acquisition Reports placed the program’s total estimated cost well above $6 billion, though the Air Force has not released a final accounting that covers spending through termination.
What AEP can and cannot do
With OCX gone, the Air Force has defaulted to the Architecture Evolution Plan, or AEP, the bridging ground control system that has kept GPS satellites operational during the long wait for OCX. According to the official GPS.gov description, AEP was built to sustain day-to-day operations while the next-generation system was under construction. It was a stopgap, not a destination.
AEP can manage existing GPS satellites and maintain the signal accuracy that billions of users depend on for everything from smartphone navigation to precision agriculture. Based on the GPS.gov description of AEP’s scope and the capabilities OCX was contracted to deliver, AEP was not designed to command the full GPS III constellation with all of its advanced features, or to defend ground control infrastructure against the electronic warfare and cyber threats that have intensified since the program’s original requirements were written. No primary document has been located that explicitly catalogs the capability gap in those terms, but the contrast between AEP’s stated bridging role and OCX’s contracted requirements supports the distinction.
OCX was supposed to close both of those gaps. Its cancellation means the Air Force must now decide whether to retrofit AEP with upgraded cybersecurity protections and GPS III compatibility, or launch an entirely new acquisition program to replace the one that just failed. Neither option has been publicly outlined. No official cost estimate, timeline, or technical roadmap for AEP’s expanded role has been released as of May 2026.
Unanswered questions for RTX and the Pentagon
RTX has not issued a dedicated public statement addressing the OCX cancellation, based on a review of available primary records. It is worth noting that the company’s quarterly earnings calls and SEC filings may contain relevant disclosures about the program’s financial impact or contract status; however, no direct corporate commentary specifically addressing the termination’s terms or workforce consequences has been identified in those filings as of May 2026. Whether RTX will contest any portion of the cancellation or seek settlement payments for completed work remains unclear.
On the government side, the Air Force has not published a formal program termination notice with a detailed cost breakdown or an explanation of the internal decision-making that led to cancellation. Without that documentation, the full financial toll of OCX on taxpayers cannot be calculated with precision. The $379.8 million contract modification recorded in May 2025 is a verified data point, but it represents a fraction of the program’s cumulative cost.
Defense analysts and trade publications have reported additional details, often attributed to unnamed officials, but those accounts cannot be independently verified against contract documents. Named commentary from defense analysts or congressional critics would add important texture to the public record, yet none has been confirmed through primary sources for this account. Until the Pentagon releases its own after-action record, the complete story of how OCX consumed more than a decade and billions of dollars without delivering a working system will remain incomplete.
What this means for GPS users and national security
For the roughly four billion people and countless military systems that rely on GPS signals daily, the immediate impact is limited. AEP keeps the satellites running, and GPS service will not degrade overnight. The deeper concern is strategic. The ground control system now managing the constellation predates many of the threats it is expected to withstand, from sophisticated jamming by near-peer adversaries to cyberattacks targeting satellite command links.
The GPS III satellites already in orbit were built to deliver stronger, more jam-resistant signals, but unlocking their full potential requires ground infrastructure that AEP was not engineered to provide. Every month that passes without a successor to OCX is a month in which the newest hardware in space operates below its designed capability.
Whether the Air Force can close that gap through incremental upgrades to AEP or will need to start another large-scale acquisition program is the central unresolved question hanging over the cancellation. The history of OCX suggests that answering it will take years, and the cost of getting it wrong again will be measured in more than dollars.
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*This article was researched with the help of AI, with human editors creating the final content.
