US Space Force / Space Systems Command
government-agencyUS Space Force / Space Systems Command
Type: Government Agency (US Department of Defense)
Space Systems Command (SSC) is the acquisition arm of the US Space Force responsible for developing, acquiring, and fielding space capabilities. In 2025-2026, SSC is executing the first government-funded satellite refueling demonstrations — a $118.8M program that proves the depot-servicer-client model and validates GEO refueling as an operationally viable capability for national security space assets.
The dual-use logic is compelling: if commercial GEO satellite operators adopt refueling (extending asset life), and military GEO satellites are refuelable on the same infrastructure, the US gets both a commercial industry and a resilient military capability from the same investment. Lt. Gen. Philip A. Garrant framed the demos explicitly as requirements development — understanding what operational refueling needs before committing to large-scale procurement.
Key Programs
2026 Demo: APS-R Mission (USSF-23)
- Target: Summer 2026; launches as USSF-23
- Mission stack: Astroscale US fuel-transfer spacecraft + Orbit Fab propellant depot + Starfish Space "space tug" servicer
- Mission profile:
- Launches to above GEO
- Servicer mates with the AFRL Tetra-5 client and refuels it
- Returns to the Orbit Fab depot for more fuel
- Refuels the second Tetra-5 satellite
- Significance: First triple-refueling demonstration; proves full supply chain (depot → servicer → client) (State of ISAM 2026)
Dedicated Otter (Starfish Space, delivery 2028)
- $54.5M SSC contract via the Pentagon's APFIT program (awarded Feb 7 2026) for a dedicated national-security servicing Otter — one of the largest APFIT awards ever. (State of ISAM 2026)
2028 Demo: Northrop Grumman Elixir
- Northrop Grumman satellite bus with refueling capabilities
- Will dock with Space Force Tetra-6 satellite
- Represents second industry team per competition model
Funding Breakdown
| Source | Amount | Purpose |
|---|---|---|
| Space Systems Command | $44.5M (2022) | Two Tetra-5 target satellites |
| Defense Innovation Unit | $13.3M | Orbit Fab fuel depot |
| Space Enterprise Consortium | $61M | Astroscale refueler |
| Total | $118.8M |
Key Contributions
- First US government-funded satellite refueling demonstrations (Space Force Refueling Demos)
- Proves depot-servicer-client model with Orbit Fab + Astroscale (Space Force Refueling Demos)
- Creates military anchor customer for commercial GEO servicing market (Space Force Refueling Demos)
Mentioned In
- On-Orbit Servicing — Government anchor customer for GEO refueling
- Orbital Fuel Transfer — Government validation of commercial refueling supply chain
Related Entities
- Astroscale — APS-R mission prime contractor
- Orbit Fab — Fuel depot provider (DIU contract)
- Starfish Space — USSF-23 servicer tug + $54.5M dedicated Otter
- Northrop Grumman — 2028 Elixir refueling demo (Tetra-6)
Changelog
- 2026-06-24 — Added USSF-23 framing (Starfish Space servicer in the APS-R stack) and the $54.5M dedicated-Otter SSC contract.
- 2026-04-14 — Initial compilation.