LONG BEACH, CALIFORNIA, — U.S.-based space startup Spaceium is offering satellite manufacturers a $1 licence for its OpenPort refueling interface, aiming to establish a common connection standard for in-orbit satellite refueling. The company plans to build automated orbital fuel stations and generate revenue by supplying propellant rather than selling refueling hardware.
How OpenPort Works
Unlike conventional satellite fueling ports, which are generally used before launch, OpenPort is designed for repeated refueling in space. Its androgynous design allows propellant to flow in both directions, meaning two spacecraft equipped with identical ports can connect and transfer fuel. The interface also replaces the standard ground-fueling port, avoiding the need for an additional component.
Spaceium describes the system as fuel-agnostic, with its technology intended to support different propellants. The company aims to use this approach to allow satellites to receive fuel after launch and extend their operational lives.
Testing and Future Plans
Spaceium has already flown a precision robotic actuator for its future refueling system aboard SpaceX's Transporter-15 mission in November 2025. The company plans to send OpenPort hardware to the International Space Station (ISS) in the first half of 2027 to demonstrate xenon propellant transfer on a spacecraft docked outside the station.
The company is developing the technology for automated orbital refueling stations. Its approach could allow satellites to extend their missions, perform additional orbital manoeuvres and undertake longer-distance space missions without carrying all their required fuel at launch.
Competition in Orbital Refueling
Spaceium is entering a growing market for in-space servicing. Orbit Fab is also developing orbital refueling infrastructure and made its RAFTI refueling interface available under an open licence in October 2021.
Founded by Ashi Dissanayake and Reza Fetanat, Spaceium aims to make orbital refueling more accessible by encouraging spacecraft manufacturers to adopt OpenPort. If widely adopted, the interface could help establish a network of orbital fuel stations for future satellite and space missions.
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