IN-SPACE REFUELING
Spargo Space builds 2,000 kg autonomous hydrazine and MON-3 propellant depots. Our advisory VLM-GNC autonomy stack handles rendezvous, proximity operations, and docking.
PROBLEM
Every spacecraft launches with a finite propellant budget. When stationkeeping margin runs out, missions end early or require replacement — even when the bus, payload, and ground segment are still fully operational.
Orbital refueling decouples a vehicle's useful life from the propellant it could carry on day one.
TECHNOLOGY
A storable-propellant orbital depot, served by an autonomy stack engineered for safety-critical proximity operations.
A 2,000 kg storable-propellant (hydrazine / MON-3) orbital depot for in-space refueling. Connects through existing, industry-standard docking interfaces.
A vision-language model provides advisory, non-authoritative perception and decision support to a deterministic guidance, navigation, and control stack. A deterministic safety layer retains actuator authority at all times. Patent-pending.
CAPABILITIES
Long-duration on-orbit assets sized for repeated refueling cycles, not single-use missions.
Advisory VLM perception feeds a deterministic GNC stack that executes rendezvous, prox ops, and capture without ground-in-the-loop control.
Connects through existing, industry-standard docking interfaces — no proprietary hardware required on the client vehicle.
Designed for a multi-depot constellation that grows with orbital-economy demand rather than per-customer one-offs.
USE CASES
Extend tug duty cycles and reposition payloads farther without compromising return-to-base margin.
Top off stationkeeping budgets for long-duration platforms — stations, habitats, and persistent science assets.
Decouple satellite end-of-life from propellant depletion; preserve revenue-generating or mission-critical capacity already on orbit.
Building the infrastructure for sustainable space operations.
TEAM
FOUNDER & CEO
PhD, Electrical and Computer Engineering, Vanderbilt. BA, Astrophysics, Columbia. Previously Blue Origin and NASA. 2024 Payload 30-Under-30.
CO-FOUNDER & CTO
NSF Graduate Research Fellow. ECE PhD candidate, Stony Brook. BA, Computer Science, Wesleyan. First-author publications in The Astrophysical Journal.
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CONTACT
Whether you're operating commercial satellites or planning deep space exploration, our team is here to discuss how orbital refueling can transform your operations.
EMAIL US → rnederlander@spargospace.com