// UNMANNED SYSTEMS AND NEXT-GEN WARFARE TERM
On-Orbit Servicing
On-Orbit Servicing refers to repairing, refueling, or upgrading satellites while they are still in space. This is often done using robotic spacecraft to extend the life and improve the capabilities of existing assets.
TECHNICAL DEFINITION
On-Orbit Servicing, Assembly, and Manufacturing (OSAM) encompasses robotic and autonomous systems performing in-space operations like satellite refueling, component replacement, and system upgrades to extend asset lifespan, enhance resilience, and manage space debris. These activities involve complex rendezvous and proximity operations (RPO) and are critical for space logistics, domain awareness, and both commercial and military space infrastructure sustainability.
BACKGROUND
The United States Armed Forces are the military forces of the United States. United States federal law establishes six armed forces: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard, each assigned specific roles and operational domains. With the exception of the Coast Guard, which operates under the Department of Homeland Security (DHS) in peacetime, the services are organized under the Department of Defense (DoD).
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- in-space servicing
- satellite servicing
- OSAM
- robotic servicing mission
- satellite life extension
- in-orbit servicing
USAGE NOTE
The term is central to discussions on space sustainability and logistics, but its dual-use nature also raises counter-space and national security concerns.
DEVELOPERS
Organizations developing technology related to On-Orbit Servicing.
A subsidiary of Northrop Grumman, SpaceLogistics is a pioneer in on-orbit servicing. They operate the Mission Extension Vehicle (MEV) which docks with client satellites to provide propulsion and attitude control, extending their operational life. They are also developing the Mission Robotic Vehicle (MRV) for more complex in-orbit repairs and modifications.
DARPA is a key U.S. government agency funding the development of advanced on-orbit servicing capabilities. Its Robotic Servicing of Geosynchronous Satellites (RSGS) program aims to create a dexterous robotic servicer that can inspect, repair, and upgrade satellites in GEO, which is critical for national security assets.
Maxar develops advanced robotics for space applications. The company is providing the robotic arm payload for DARPA's RSGS program and was the industry partner for NASA's OSAM-1 mission, designed to demonstrate robotic refueling and assembly of a satellite in low Earth orbit. These technologies are directly applicable to military servicing needs.
Known as the 'Gas Stations in Space' company, Orbit Fab is focused on building an in-orbit propellant supply chain. They have developed a standardized refueling port (RAFTI) and are building fuel tankers, known as depots, to service commercial and military satellites, extending their missions and enabling greater maneuverability.
AFRL is the primary scientific research and development center for the U.S. Air Force and Space Force. Its Space Vehicles Directorate is actively developing and testing technologies for On-orbit Servicing, Assembly, and Manufacturing (OSAM) to enhance the resilience and capabilities of U.S. military space systems.
While known globally for space debris removal, Astroscale's U.S. entity focuses on satellite life-extension and on-orbit services for government and military clients. Their core technologies in rendezvous, proximity operations, and docking (RPOD) are fundamental for servicing missions, and they have won contracts from the U.S. Space Force to advance these capabilities.
As a military service, the USSF is a primary customer and driver of requirements for on-orbit servicing. Through commands like Space Systems Command (SSC), it funds, develops, and acquires technologies to inspect, maintain, and protect national security satellites, viewing on-orbit servicing as a key component of dynamic space operations and resiliency.
A major defense prime contractor, Lockheed Martin develops a wide range of space technologies, including those for on-orbit servicing and mission extension. They are involved in developing serviceable satellite bus architectures, advanced robotics, and concepts for upgrading military space assets in-orbit to counter emerging threats.