The Pentagon Is Replacing Its Satellite Relay Network. The Terminal Shortage Comes With It.

The Space Force this week confirmed it will not fund the next generation of its military data relay satellites through the existing program, pivoting to a $1.6 billion successor called the Space Data Network. The program it's leaving behind was already short on the most critical piece of hardware it needs, and that shortage does not go away because a program office changes names. Three weeks ago, Rocket Lab, the aerospace company, acquired one of the four companies the Pentagon has ever qualified to build the laser terminals (devices that let satellites in orbit talk directly to each other without routing signals through a ground station) that every satellite in this network requires. Rocket Lab also holds $805 million in satellite contracts for the same program.

The constellation in question is the Pentagon's Proliferated Warfighter Space Architecture, a network of hundreds of small, cheap satellites in low Earth orbit designed to track missile launches, move data between sensors and weapons, and survive attack by being too numerous to kill quickly. According to Aviation Week, the Space Force's fiscal 2027 budget request, released April 3, confirms the service is not funding Tranche 3 of the Transport Layer, the data-moving portion of that network, and plans to fold those requirements into the Space Data Network instead. The $1.6 billion for the SDN was confirmed by the Air Force's deputy assistant secretary for budget at an April 21 media briefing. The Space Development Agency, the office that has managed the constellation since 2019, "probably won't" exist as a standalone organization, acting director Gurpartap "GP" Sandhoo told reporters on April 15.

The terminal shortage that delayed the existing program travels with it. The agency qualified four suppliers for optical communications terminals: CACI, Tesat-Spacecom, Skyloom, and Mynaric, a German manufacturer. Four was already a thin supply base for a program building hundreds of satellites. On April 14, Rocket Lab closed a $155.3 million acquisition of Mynaric, bringing the number of independent qualified suppliers to three. Sandhoo said on April 1 at the Mitchell Institute's Fourth Annual Spacepower Security Forum in Arlington: "From an optical communications terminal perspective, we're not there yet on how many we need. The throughput is not there yet."

The shortage has already forced compromises in orbit. When 21 Lockheed Martin satellites for the SDA's Tracking Layer, the part of the constellation designed to detect and track missile launches, flew in October, each carried three terminals instead of the four originally planned. The Transport Layer satellites had their launches paused for months waiting on software updates and terminal fixes that took longer than projected. Launches will resume in May or June, Sandhoo told reporters at the Space Symposium. The SDA has named optical terminals alongside connectors and propellant tanks as persistent supply chokepoints.

What happens to that supply under the new program structure depends on what Rocket Lab does with Mynaric. The vertical integration case for the acquisition is real: Rocket Lab won $805 million in the Tranche 3 Tracking Layer awards to build 18 satellites, and those satellites need terminals. Owning a qualified manufacturer removes a dependency. But the other three Tranche 3 satellite primes also need to source terminals from a pool that now includes a competitor's subsidiary. Lockheed Martin won $1.1 billion in Tranche 3 awards; L3Harris won $843 million; Northrop Grumman won $764 million. None of them own a terminal manufacturer.

The Tranche 3 program totals $3.5 billion across four contractors, building 72 tracking satellites, half of which are missile defense assets requiring fire-control quality targeting — the most demanding performance tier. The SDN successor program will need terminals too, and the $1.6 billion funding request says nothing about the supply chain that has to fill that order. The Transport Layer is expected to eventually transfer from the SDA to a new Pentagon acquisition executive as the constellation matures, with Sandhoo himself expected to take on a new role as Portfolio Acquisition Executive for missile warning and tracking.

Kepler Communications, a Canadian company, was on the same Space Symposium panel as Sandhoo. Kepler launched 10 optical relay satellites on a SpaceX Falcon 9 from Vandenberg in January and operates what it calls the first commercial optical data relay constellation, with 33 satellites in orbit total. CEO Mike Mitry's pitch: a commercial, multi-user relay network built on open standards, where no single prime controls access to orbital communication links.

Neither Sandhoo nor the Space Force's budget documents address what happens to the qualified terminal supplier list when one of those four companies is no longer an independent vendor.