The U.S. Space Development Agency and Missile Defense Agency are drawing on the same AST SpaceMobile satellites built to give ordinary smartphones broadband service, using dedicated secure-frequency partitions on the spacecraft to test an alternative source of positioning, navigation, and timing data for military equipment operating where GPS is jammed or spoofed. AST SpaceMobile confirmed the arrangement on July 1, 2026, while finalizing assembly of BlueBirds 11 through 13, its next batch of direct-to-device satellites, ahead of a launch scheduled for the first half of August, following the June 17 deployment of BlueBirds 8, 9, and 10, according to SatNews.
A commercial network's second job: standing in for GPS
GPS signals arrive at Earth's surface at roughly -130 dBm, weaker than a typical Wi-Fi signal, which is what makes them so easy to jam or spoof, according to an industry analysis of emerging navigation technology. The Federal Communications Commission opened a formal inquiry in 2025 into complements and alternatives to GPS, warning that the American economy and national security depend on a single source of positioning, navigation, and timing data with no built-in backup. Because low Earth orbit satellites sit a few hundred kilometers up rather than GPS's roughly 20,200-kilometer altitude, their signals reach the ground far stronger and more jam-resistant, the same analysis notes, which is why purpose-built ventures like Xona Space Systems and TrustPoint are racing to build dedicated LEO positioning constellations. AST SpaceMobile's approach is different: rather than building a satellite for navigation, it is carving out spectrum on a constellation designed for cellphones.
The defense contract that came before the satellites did
AST SpaceMobile became a prime contract awardee on the Missile Defense Agency's SHIELD program in January 2026, an indefinite-delivery, indefinite-quantity contract that sits inside the broader Golden Dome missile-defense strategy aimed at layered protection across air, missile, space, cyber, and hybrid threats, the company announced. The award qualifies AST SpaceMobile to bid on future task orders covering research, development, engineering, prototyping, and operations of Missile Defense Agency systems, rather than guaranteeing specific work upfront. Six months later, the company said it is now designing dedicated secure-frequency partitions into its large-aperture satellite arrays specifically to support tactical over-the-horizon communications, telemetry backhaul, and alternative PNT data reaching unmodified military equipment in contested, electronic-warfare-heavy, or radar-denied environments, according to SatNews's coverage of the BlueBird 11-13 launch preparations.
Competitors are chasing the same opening
AST SpaceMobile is not the only commercial network angling for this role. Globalstar has a Cooperative Research and Development Agreement with the U.S. Army to test its own satellites for secure communications, covert sensing, and tracking in difficult environments, while the Space Force has selected Viasat to help build secure, resilient satellite communications for military users through the PTS-G program, according to a Zacks Investment Research analysis of AST SpaceMobile's competitive position. That the Pentagon is testing PNT and secure-communications options across several commercial constellations at once suggests it isn't betting on any single provider to solve the GPS-resilience problem, which raises the stakes on AST SpaceMobile proving out its own approach to separating government and civilian traffic before its slice of that work pays off.
One antenna, two missions
The security question other coverage of the BlueBird program has largely skipped: putting commercial smartphone traffic and defense-grade secure PNT data on the same physical satellite means the constellation's beam-forming software, ground segment, and encryption key management now have to separate government and civilian traffic on hardware that was not purpose-built for that isolation the way a dedicated military satellite would be. AST SpaceMobile's Block 2 satellites run a shared AST5000 processing architecture across roughly 2,000 discrete coverage cells per satellite, according to SatNews, meaning the same onboard compute handles both jobs. How cleanly that separation holds up once the network is simultaneously serving Vodafone-backed SatCo traffic in Europe, FirstNet, and dozens of other mobile carrier partnerships is a question the public record doesn't yet answer, and one the FCC's PNT inquiry does not directly ask either, since it evaluates LEO candidates mainly on resilience rather than on how well military and civilian traffic stay apart.
The launch schedule that keeps slipping, and why it matters here
AST SpaceMobile's near-term deployment plan already shows the strain of serving this many stakeholders at once. BlueBird 7 was destroyed in a Blue Origin New Glenn launchpad failure in late May 2026, forcing the company to shift its remaining near-term satellites onto SpaceX Falcon 9 flights and pushing the start of continuous commercial service into the first half of 2027, according to SatNews. That slip affects the same satellites now expected to carry defense-grade secure PNT payloads, which means any near-term GPS-alternative capability the Space Development Agency or Missile Defense Agency might draw from the constellation rides on the same launch cadence, and the same failure risk, as AST SpaceMobile's commercial rollout to nearly 60 mobile network operators worldwide.
News first reported by SatNews.
