Satellite servicing refers to missions that dock with, inspect, or modify spacecraft in orbit. Operational flight missions have docked with active commercial communications satellites in geosynchronous orbit, attached life-extension hardware, conducted close-range inspection of discarded rocket bodies, and demonstrated magnetic capture mechanisms.
Commercial life-extension vehicles, agency-funded robotic servicing arms, and inspection craft operate across low Earth orbit and geosynchronous orbit. Operators including Northrop Grumman, Astroscale, and Starfish Space have conducted orbital dockings, close approaches, and hardware deployments under commercial contracts and government partnerships.
Demonstrated Orbital Missions and Commercial Dockings
Satellite servicing has moved from ground development to operational flight missions that dock with active satellites in orbit. The first docking with an operational satellite in geosynchronous orbit occurred on February 25, 2020, when Northrop Grumman’s MEV-1 docked with Intelsat 901. Northrop Grumman followed that flight by launching MEV-2 on August 15, 2020. MEV-2 completed docking with Intelsat 10-02, also designated IS-1002, on April 12, 2021.
Both Mission Extension Vehicles were originally contracted for five years of life extension each. On May 23, 2024, Northrop Grumman agreed to extend MEV-2 service to IS-10-02 by four additional years, nearly doubling the initial contract duration. MEV-1 completed its primary mission on April 9, 2025, when it undocked from IS-901 in the geosynchronous graveyard orbit. Northrop Grumman documented this maneuver as the first undocking between two commercial spacecraft in geosynchronous orbit. Following the undocking, Northrop Grumman announced that MEV-1 is relocating to its next orbital mission.
Northrop Grumman advanced its satellite servicing architecture on July 21, 2026, launching the Mission Robotic Vehicle aboard a Falcon 9 from Cape Canaveral Space Launch Complex 40. The MRV carried three Mission Extension Pods on its flight manifest. Each Mission Extension Pod is engineered to attach to a client satellite to deliver approximately six years of additional operational life. The MRV also integrates a Passive Refueling Module, which Northrop Grumman identifies as the first refueling interface standard approved by the United States Space Force. Operational aspects of propellant transfer on orbit are analyzed in our guide to orbital refueling.
DARPA Robotic Servicing of Geosynchronous Satellites
The Mission Robotic Vehicle serves as the flight platform for the Robotic Servicing of Geosynchronous Satellites program, led by the Defense Advanced Research Projects Agency. DARPA states that the MRV carries the RSGS robotic servicing suite, which was developed in partnership with the Naval Research Laboratory. The robotic payload contains two seven-joint manipulator arms equipped with interchangeable tools designed for on-orbit mechanical operations.
The MRV utilizes electric propulsion to raise its orbit toward geosynchronous orbit at approximately 36,000 kilometers, or 22,000 miles, altitude. DARPA notes that transit to this altitude takes about one year using electric propulsion thrusters. DARPA expects the servicing vehicle to operate for more than 10 years in orbit. Documentation from DARPA records a 2024 partnership agreement with NASA and designates the United States Space Force as the intended future coordinator of commercial servicing operations. The underlying spacecraft bus structures that support these missions are detailed in our review of satellite bus architecture.
NASA OSAM-1 Development and Cancellation
NASA pursued government-directed robotic satellite servicing through the On-Orbit Servicing, Assembly, and Manufacturing 1 mission before terminating the program. NASA targeted the Landsat 7 satellite for on-orbit robotic servicing and propellant transfer. According to NASA Office of Inspector General report IG-24-002 published in October 2023, the early project estimate of $626 million to $753 million grew to $1.04 billion by June 2018.
The OIG report documented that OSAM-1 was projected to exceed its revised $2.05 billion cost baseline and would miss its December 2026 launch commitment. The Inspector General traced these schedule and cost overruns to poor performance by Maxar on contracts for the spacecraft bus and the SPIDER robotic arm. Maxar had received a $105 million firm-fixed-price award in December 2016 for the spacecraft bus. NASA supplied roughly $2 million in unplanned agency labor and services to supplement Maxar engineering teams during development.
NASA officially cancelled the OSAM-1 mission on March 1, 2024, after approximately $1.5 billion had been appropriated to the program. NASA cited technical, cost, and schedule challenges, alongside what the agency described as a broader community evolution away from refueling unprepared spacecraft.
Astroscale Inspection and Debris Removal Programs
Astroscale has conducted multiple on-orbit servicing demonstrations focused on magnetic capture, close-proximity rendezvous, and spacecraft inspection. On August 25, 2021, Astroscale demonstrated repeated magnetic capture in orbit with its ELSA-d mission, successfully releasing and recapturing a target client spacecraft.
The company advanced rendezvous operations through its ADRAS-J spacecraft, which completed a historic 15-meter approach to orbital debris from an initial 50-meter hold point. During proximity operations near a spent rocket upper stage, ADRAS-J executed an autonomous abort maneuver triggered by an unexpected relative attitude anomaly. On September 1, 2026, Astroscale Japan selected Isar Aerospace to launch the follow-on ADRAS-J2 mission aboard a Spectrum rocket from Andoya, Norway, between 2027 and 2028. ADRAS-J2 is assigned to rendezvous with a rocket upper stage measuring roughly 11 meters in length and weighing roughly 3 tonnes. Debris tracking contexts are outlined in our explainer on space debris.
Astroscale has announced two additional satellite servicing flight initiatives:
- ISSA-J1 Inspection Mission: Announced on April 6, 2026, this 650-kilogram spacecraft is scheduled for a 2027 launch to inspect two retired Japanese satellites within a single mission. The flight plan targets the ALOS spacecraft at roughly 691 kilometers altitude and ADEOS-II at approximately 803 to 820 kilometers altitude, as reported by Astroscale.
- ELSA-M End-of-Life Mission: The 520-kilogram ELSA-M servicer completed its critical design review in 2025 with funding from Astroscale, the UK Space Agency through the European Space Agency, and Eutelsat. Astroscale chose Isar Aerospace to launch ELSA-M to capture and deorbit a Eutelsat OneWeb satellite.
The broader market dynamics of removing non-functional spacecraft from orbit are analyzed in our review of active debris removal. Commercial investment profiles for this sector can be tracked through our coverage of Astroscale stock.
Starfish Space Rendezvous and Defense Contracts
Starfish Space develops autonomous servicing vehicles designed for orbital life extension and disposal. On November 13, 2024, Starfish Space raised $29 million, bringing its total funding past $50 million to advance production of its Otter servicing craft. Starfish Space confirmed that Otter flight missions are planned for commercial operator Intelsat in geosynchronous orbit, alongside mission task orders for NASA and the United States Space Force.
Starfish Space introduced its demonstration craft when it unveiled the Otter Pup 2 mission on May 20, 2025. The vehicle was scheduled to ride a Falcon 9 on the Transporter-14 rideshare launch to attempt a commercial docking with an unprepared low Earth orbit satellite, with the original target identified as a D-Orbit ION spacecraft. The Otter Pup 2 flight launched in June 2025. Primary sources have not confirmed an orbital docking success for Otter Pup 2.
The United States Space Force has committed funding to Starfish Space across multiple servicing awards:
- A $37.5 million Strategic Funding Increase contract awarded on May 20, 2024.
- A $52.5 million contract for end-of-life spacecraft disposal awarded on January 21, 2026.
- A $54.5 million Space Force contract awarded on February 7, 2026, under the Accelerated Procurement and Fielding of Innovative Technologies program. This agreement funds a dedicated second Otter vehicle for geosynchronous orbit delivery scheduled for 2028.
On September 24, 2026, Starfish Space announced that its first operational Otter vehicle was scheduled to launch on SpaceX Transporter-18, no earlier than October 2026, to execute NASA’s SSPICY inspection flight.
NASA’s October 8, 2026 article reports that SSPICY launched October 1 from Vandenberg Space Force Base in California, with Otter due to begin inspecting up to four inoperable U.S.-origin objects in early 2027. NASA says Otter will not touch or dock with any satellite, and the same article describes the effort as supporting orbital debris inspection. Our NASA SSPICY guide covers the mission in full.
Satellite Servicing Missions and Program Records
Flight records demonstrate that satellite servicing encompasses life extension, robotic hardware installation, non-contact inspection, and active capture across orbits.
| Servicing Program | Lead Organization | Mission Classification | Target Orbit | Operational Flight Status |
|---|---|---|---|---|
| MEV-1 | Northrop Grumman | GEO Commercial Life Extension | Geosynchronous Orbit | Docked 2020; completed mission and undocked April 2025 |
| MEV-2 | Northrop Grumman | GEO Commercial Life Extension | Geosynchronous Orbit | Docked 2021; service extended four years (May 2024) |
| MRV and MEPs | Northrop Grumman / DARPA | Robotic Servicing and Life Extension | Geosynchronous Orbit | Launched July 2026 |
| OSAM-1 | NASA | Robotic Servicing Demonstration | Not stated in sources | Terminated March 2024 after $1.5B appropriation |
| ELSA-d | Astroscale | Magnetic Capture Demonstration | Not stated in sources | Completed repeated magnetic capture August 2021 |
| ADRAS-J | Astroscale | Debris Proximity Inspection | Not stated in sources | Completed 15-meter approach to upper stage late 2024 |
| ADRAS-J2 | Astroscale Japan | Debris Removal Demonstration | Not stated in sources | Launch contract signed with Isar Aerospace for 2027 to 2028 |
| ELSA-M | Astroscale | End-of-Life Deorbit Servicing | Not stated in sources | CDR completed 2025; launch contract signed with Isar Aerospace |
| ISSA-J1 | Astroscale Japan | Multi-Orbit Satellite Inspection | Low Earth Orbit | Announced April 2026; launch targeted for 2027 |
| Otter Pup 2 | Starfish Space | Docking Demonstration | Low Earth Orbit | Launched June 2025; docking outcome unconfirmed |
| Otter (SSPICY) | Starfish Space | NASA Inspection Mission | Not stated in sources | Launched October 1, 2026 per NASA; inspections begin early 2027 |
| Otter (USSF) | Starfish Space | GEO Servicing Vehicle | Geosynchronous Orbit | $54.5M Space Force contract for delivery in 2028 |
Commercial Pricing Models and Public Disclosures
Commercial pricing structures for satellite servicing missions remain confidential. Northrop Grumman, Astroscale, and Starfish Space do not publish standard commercial price lists or annual fees for life-extension dockings on the web pages reviewed. Commercial operators negotiate contract values individually based on customer requirements, client orbit locations, and mission durations.
The only financial values available for satellite servicing programs come from government procurement actions and corporate fundraising disclosures. Disclosed government figures include NASA’s $1.5 billion cumulative appropriation for OSAM-1 before termination, Maxar’s original $105 million bus award, and the Space Force’s $54.5 million award to Starfish Space for an Otter vehicle. Astroscale’s ELSA-M program is supported by direct co-funding from the UK Space Agency and Eutelsat alongside private capital.
Satellite operators evaluating servicing missions must monitor technical readiness through published flight results and manifest filings. To evaluate upcoming orbital inspection and docking operations, monitor contract updates published on the Northrop Grumman SpaceLogistics and Starfish Space releases for verified flight telemetry and mission execution schedules.