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On-orbit Servicing, Assembly, and Manufacturing 1 (OSAM-1)

Building on NASA’s history of upgrading and maintaining assets in space, NASA’s OSAM-1 mission is developing an unprecedented capability for a robust, cost-effective space infrastructure.

Active Mission

On Feb. 29, NASA held an Agency meeting to receive the recommendations from a Continuation Review conducted by an Independent Review Board related to NASA’s OSAM-1 project. After the review, NASA canceled the project and notified Congress of the agency’s decision. On March 9, NASA’s Fiscal Year 2024 Appropriations was signed into law, directing NASA to continue with an adjusted OSAM-1 mission. At this time, NASA is working through the Appropriations Committee's direction related to OSAM-1 while it continues work on OSAM-1 and assesses whether the adjusted OSAM-1 mission outlined in FY24 Appropriations is viable. Additionally, NASA continues to explore potential partnerships.

Mission Type

Technology Demonstration


Maxar Technologies


Polar low Earth orbit (LEO)


Autonomous rendezvous and telerobotic refueling

Proving Satellite Servicing

Need extra gas or a tune-up for your satellite? For years, such services were outside the realm of possibility for most spacecraft. But now, one mission will break that paradigm.

During its mission, the OSAM-1 servicer will rendezvous with, grasp, refuel and relocate a government-owned satellite to extend its life. But OSAM-1’s effect will not end there.

The benefits are many. OSAM-1’s capabilities can give satellite operators new ways to manage their fleets more efficiently, and derive more value from their initial investment. These capabilities could even help mitigate the looming problem of orbital debris.

Successfully completing this mission will demonstrate that servicing technologies are ready for incorporation into other NASA missions, including exploration and science ventures. NASA is also transferring OSAM-1 technologies to commercial entities to help jumpstart a new domestic servicing industry.

Space Infrastructure Dexterous Robot (SPIDER)

The OSAM-1 spacecraft will include an attached payload called Space Infrastructure Dexterous Robot (SPIDER).

SPIDER includes a lightweight 16-foot (5-meter) robotic arm, bringing the total number of robotic arms flying on OSAM-1 to three. Previously known as Dragonfly during the ground demonstration phase of the NASA Tipping Point partnership, SPIDER will assemble seven elements to form a functional 9-foot (3-meter) communications antenna. The robotically assembled antenna will demonstrate Ka-band transmission with a ground station.

The OSAM-1 spacecraft will include an attached payload called Space Infrastructure Dexterous Robot (SPIDER).

The payload also will manufacture a 32-foot (10-meter) lightweight composite beam using technology developed by Tethers Unlimited of Bothell, Washington. The assembly and manufacturing element of the demonstration will verify the capability to construct large spacecraft structures in orbit.

SPIDER will help mature space technologies with many potential cross-cutting applications, including:

  • Enabling new architectures and capabilities for a wide range of government and commercial missions
  • Enabling In-space construction of large communications antennae and telescopes
  • Eliminating volume limits imposed by rockets
  • Replacing some astronaut extravehicular activity tasks with precision robotics
  • Introducing the potential for longer mission durations enabled by planned or unplanned maintenance

Bringing OSAM-1 to Life

It takes years of testing, countless hours of design, and five new technologies to make robotic satellite servicing a reality. Here’s a breakdown of the key elements of OSAM-1.

Servicing Technologies

Sensors, algorithms and a processor join forces, allowing OSAM-1 to rendezvous safely with its client.

In addition to ingesting and crunching sensor data, these elements control OSAM-1’s rendezvous and robotic tasks.

Two nimble, maneuverable arms precisely execute servicing assignments. Software comes included.

Sophisticated, multifunction tools are manufactured to execute each servicing task.

This system delivers measured amounts of fuel to the client at the right temperature, pressure and rate.

OSAM-1 News

Update on Status of NASA’s OSAM-1 Project
1 min read

Following an in-depth, independent project review, NASA has decided to discontinue the On-orbit Servicing, Assembly, and Manufacturing 1 (OSAM-1) project…

Spacecraft Bus for Satellite Servicing Mission Arrives at NASA Goddard
2 min read

Spacecraft Bus for Satellite Servicing Mission Arrives at NASA Goddard

Image Article
NASA’s Robotic OSAM-1 Mission Completes its Critical Design Review
2 min read

NASA’s On-orbit Servicing, Assembly, and Manufacturing 1 (OSAM-1), a mission that will be the first to robotically refuel a satellite…


NASA Creates ISAM Consortium

NASA announced a new consortium focused on making in-space servicing, assembly, and manufacturing (ISAM) capabilities a routine part of space architectures and mission lifecycles.

Learn More about NASA Creates ISAM Consortium
The autocapture test bed during a test.