Tetra-5

Tetra-5 is a U.S. Space Force Space Systems Command program to demonstrate proximity operations, inspection, and on-orbit propellant transfer in geosynchronous orbit. The Tetra-5 satellites fly on Redwire's Mako microsatellite bus.

APS-R (Astroscale Prototype Servicer for Refueling), built by Astroscale U.S., will conduct the first on-orbit hydrazine refueling of a Space Force satellite at GEO.