The case for refueling GEO satellites has moved from abstract concept to a clear national priority, with implications for security, defense, and commercial markets. A new analysis shows that on-orbit servicing—specifically, refueling satellites in geostationary orbit (GEO)—offers one of the most immediate and impactful applications, suggesting targeted funding, early field tests, and coordinated policy work to make this capability routine.
These conclusions come from a December 10 report by COSMIC—the Consortium for Space Mobility and ISAM Capabilities. COSMIC, formed by NASA in 2023 to align U.S. efforts in in-space servicing, assembly, and manufacturing, now comprises more than a thousand members across industry, academia, and government. The group delivers shared technical assessments and policy guidance on services such as refueling, repair, and robotic operations.
The report argues that GEO refueling is increasingly a national security necessity. Military and intelligence satellites operate with fixed fuel reserves and rising maneuvering demands, so satellites in the 22,300-mile orbit typically limit burns to preserve longevity. Introducing routine refueling would extend mission lifetimes, reduce the frequency of replacements, and enable more flexible operational concepts.
Key technologies needed for refueling exist today, including rendezvous and proximity operations sensors, docking hardware, and propellant-transfer interfaces, though maturity levels vary. With focused testing, the report contends these components could support both commercial and government servicing missions at scale, a development with potentially substantial market impact given that a single GEO satellite can cost hundreds of millions of dollars to build and launch.
After evaluating several ISAM use cases, COSMIC designated GEO refueling as a “critical capability” that keeps assets viable over their lifespans and unlocks new GEO satellite applications.
Although the U.S. Space Force aims to demonstrate GEO refueling tech by 2026 and some international demonstrations have occurred, the report emphasizes that one-off missions do not address the broader infrastructure or regulatory changes needed to establish a robust commercial refueling ecosystem.
COSMIC Executive Director Greg Richardson highlighted the value to national security, noting that the Space Force’s push for dynamic space operations—where satellites maneuver more frequently to avoid threats or meet urgent intelligence needs—could be significantly enhanced by refueling. It would allow security satellites to reposition repeatedly and adopt less predictable trajectories, complicating adversaries’ planning.
The report’s authors advocate for a shared set of recommendations spanning industry, government, and academia to present to decision-makers as budgets evolve.
Policy barriers remain a major hurdle. The report points to gaps in U.S. regulatory frameworks for new on-orbit servicing missions. Richardson calls for clearer, more streamlined licensing processes for both launches and in-space activities to benefit the entire ecosystem.
He also noted that much of the necessary hardware is ready, but many systems lack flight heritage. “What we need now is for startups and established companies with specialized designs to get their systems into space to prove they work,” he said.
Space Force trajectory and demos
The Space Force is beginning to chart a path forward. At the Spacepower conference on December 10, Lt. Gen. Philip Garrant, commander of Space Systems Command, said forthcoming demonstrations will shape the requirements and concepts of operations for future refueling programs.
One key test is planned for 2026, when Astroscale plans to refuel two Space Force spacecraft in GEO. Its service vehicle, the Astroscale U.S. Refueler, will transfer hydrazine and itself refuel from an Orbit Fab propellant depot launched on the same mission. Garrant described the mission as a valuable learning opportunity.
Garrant stressed that maneuverability remains a long-term objective. “In a generation, our on-orbit capabilities will inherently be able to maneuver without hesitation and operate dynamically,” he said. He did acknowledge the cost and logistics of delivering propellant to GEO, noting that launching a gas tank to GEO is a nontrivial undertaking. The focus, he explained, is determining the best approach for the five- to fifteen-year horizon.
He also indicated that more investment is likely once the service gains a firmer grasp of requirements and technical feasibility.
Context and next steps
The COSMIC findings suggest that a coordinated effort—combining demonstrations, policy refinement, and industry development—could unlock a practical GEO refueling ecosystem. This would not only extend the life of high-value assets but also enable more adaptive and resilient space operations in a strategic domain where competition is intensifying.
Would you agree that GEO refueling should be a priority, or do you see significant risks or alternative approaches that should be explored first? Share your perspective on whether regulatory reform, private-sector investment, or international collaboration should take precedence in advancing this capability.
