On-orbit refueling, satellite servicing, and transport between orbital regions are central industrial requirements in a new assessment of U.S. military space capabilities. In an October 19, 2026, CSIS commentary, DeAnna Marie Burt and Kari A. Bingen recommend building maneuverable spacecraft in sufficient numbers and supporting them with infrastructure that allows continued operations after launch.
The commentary presents policy recommendations, rather than a new procurement announcement. Its infrastructure proposal concerns continued spacecraft operations after launch.
How Refueling Supports Maneuver
Spacecraft propulsion consumes a finite supply of propellant. Repositioning a satellite, avoiding a collision, and maintaining its assigned orbit all draw on that supply. Space Systems Command explained this constraint in its January 2024 exercise account: additional maneuvering can exhaust reserves that would otherwise support the mission. Refueling would allow operators to replenish those reserves instead of treating the launch supply as a lifetime limit.
Refueling and other forms of servicing perform different jobs. A refueling vehicle transfers propellant into a compatible receiving spacecraft. A propulsion vehicle can instead attach to a satellite and move the combined spacecraft using its own engines. Inspection, repair, and equipment replacement require other capabilities. New Space Economy’s coverage of on-orbit servicing distinguishes these activities, including commercial life extension and refueling for spacecraft designed to receive it.
The distinction affects satellite design. A spacecraft prepared for servicing can include docking hardware and a compatible fluid-transfer interface from the outset. The servicing vehicle and its customer must also use compatible propellants and operating procedures. A satellite that can accept fuel is one component of the service; the fuel supply, delivery vehicle, and rendezvous operations are additional components.
Space Systems Command described specific military applications when it introduced its mobility and logistics effort in February 2023. Those applications included changing the inclination of a satellite’s orbit, moving between geostationary orbital slots, replenishing propellant, and towing retired spacecraft to disposal orbits. Inclination describes an orbit’s tilt relative to Earth’s equator. Changing an orbital slot changes the satellite’s assigned position, which can alter the area it serves.
The command identified commercial capabilities as potential contributors to those activities. Its description included cooperation with NASA, industry, and international partners. The intended work extended beyond launching replacements: it included moving and supporting satellites already in space.
Prototype Hardware and Operating Procedures
The Tetra-5 program provides an example of the technical work behind that approach. In July 2022, Space Systems Command selected Orion Space Solutions for an agreement valued at up to $44.5 million if all options were exercised. The announced design included up to three prototype spacecraft to demonstrate autonomous rendezvous, proximity operations, docking, and servicing.
Rendezvous brings spacecraft together in a shared orbital environment. Proximity operations control their movement near one another; docking establishes a physical connection. The Tetra-5 announcement connected these functions with inspection, refueling, and automated cooperation among spacecraft. Its stated purpose included developing operating procedures and demonstrating concepts, making the agreement a prototype effort.
Operating a refueling service also requires decisions about which spacecraft receives fuel and how commercial providers participate. Parallax Rising 2.2, held in August 2023, examined refueling from a tactical command-and-control perspective. Participants considered the types of refueling vehicles suited to contested operations, integration between commercial and military refuelers, and procedures that might be adapted from naval and air operations.
Space Systems Command reported that the exercise’s findings would inform acquisition decisions and future architecture development. This addressed a different part of the problem from docking hardware: organizing the service and allocating its capabilities during operations.
Burt and Bingen’s industrial recommendation adds adaptable payloads, software updates, and multiple suppliers across spacecraft, ground systems, and user equipment. In their account, replenishing propellant is part of a broader requirement to keep military space systems usable and adaptable after deployment. The proposed infrastructure would support repeated movement and continued missions, rather than tying every operational change to the arrival of a newly launched satellite.
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