DARPA is preparing to launch its long-delayed Robotic Servicing of Geosynchronous Satellite (RSGS) mission, which aims to test robotic refueling and maintenance of satellites in high Earth orbit.

The spacecraft will operate in geosynchronous orbit, about 22,236 miles above Earth, where satellites typically cannot be easily repaired or refueled once they run out of fuel.

The mission’s robotic system is designed to perform upgrades, inspections, repairs, and even satellite repositioning to extend spacecraft lifespans.

After years of delays involving contractors and supply chain issues, the program is now expected to launch as early as this summer and begin operations after reaching orbit in 2027, Space.com has reported.

DARPA says the goal is to shift satellite operations toward a more sustainable model by reducing waste and extending the life of expensive space assets.