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OSAM-1 (formerly called Restore-L) is a NASA robot space mission under construction, aimed at servicing and refueling an existing satellite. The current target is Landsat 7 which has been in service since 1999. OSAM-1 is a prototype of the technologies, in anticipation of performing this type of service regularly. The planned launch year is 2025.
OSAM-1 is part of NASA's On-Orbit Servicing, Assembly and Manufacturing (OSAM) program. Another OSAM satellite to prototype other types of service, OSAM-2 is also in development and because of OSAM-1 delays, OSAM-2 is now scheduled for an earlier (2023) launch. OSAM-2 will prototype on-site (i.e., in space) 3D-printing-based construction.