Northrop Grumman Mission Extension Vehicle (MEV) commercial servicing operations (2016–2023)

1. ViviSat outlines commercial MEV servicing plan

   Mar 24, 2016Labels: ViviSat, Orbital ATK

   Orbital ATK’s ViviSat program publicly described plans to fly a Mission Extension Vehicle (MEV) to extend the life of aging geostationary communications satellites. The concept focused on docking to a client satellite and using the servicer’s own propulsion for station-keeping (the small, routine maneuvers that hold a satellite in place). This helped frame satellite life-extension as a commercial service rather than a one-off government mission.

   • Via Satellite

2. MEV-1 contracted to extend Intelsat 901

   Mar 24, 2016Labels: Intelsat 901, MEV-1

   Intelsat agreed to use the first MEV as a commercial life-extension service for Intelsat 901, a geostationary satellite that was otherwise nearing retirement due to limited remaining fuel. The planned service was to dock in orbit and take over key maneuvering duties, allowing the client satellite to keep providing communications. This deal set up a real customer mission that would test whether commercial satellite servicing could work at GEO.

   • Via Satellite

3. MEV-1 launches on Proton-M mission

   Oct 9, 2019Labels: MEV-1, Proton-M

   MEV-1 launched as a secondary payload on a Proton-M/Briz-M mission, starting the first commercial mission designed to dock with and maneuver another commercial satellite in geostationary orbit. The launch moved the idea of life-extension servicing from ground testing into an operational spaceflight campaign. It also began months of orbit-raising and preparations needed to safely approach a client satellite at GEO.

   • Intelsat
   • NASASpaceFlight

4. Intelsat 901 taken out of service for docking

   Dec 1, 2019Labels: Intelsat 901, Intelsat

   Intelsat removed Intelsat 901 from service and moved it so it could safely rendezvous with MEV-1. This step reduced operational risk because docking preparations required changes in orbit and careful coordination between two spacecraft. Shifting customers off the satellite also ensured service continuity while the mission demonstrated a new way to manage end-of-life satellites.

   • Intelsat

5. MEV-1 docks with Intelsat 901

   Feb 25, 2020Labels: MEV-1, Intelsat 901

   MEV-1 successfully docked with Intelsat 901, marking the first time two commercial spacecraft docked in orbit and the first commercial life-extension docking at geosynchronous orbit. The docking used a mechanical interface designed to connect to the client satellite without requiring it to have been built for servicing. This milestone proved that a commercial servicer could safely rendezvous and attach to a GEO satellite.

   • Intelsat
   • Ars Technica

6. Intelsat 901 returns to operations with MEV-1

   Apr 17, 2020Labels: Intelsat 901, MEV-1

   After on-orbit checkouts and relocation maneuvers, Intelsat 901 returned to service with MEV-1 controlling the combined “stack” (the two docked spacecraft operating as one). Intelsat transitioned customers back onto the satellite, demonstrating the commercial value of life extension: keeping a revenue-producing spacecraft operating beyond its fuel limits. The return-to-service showed that docking was not just a stunt—it enabled sustained operations.

   • Intelsat
   • Intelsat IR

7. MEV-2 launches with Intelsat Galaxy 30

   Aug 15, 2020Labels: MEV-2, Ariane 5

   Northrop Grumman’s second Mission Extension Vehicle, MEV-2, launched on an Ariane 5 mission alongside Intelsat’s Galaxy 30 satellite. Intelsat announced Intelsat 10-02 as MEV-2’s first customer, expanding the servicing approach from a single demonstration to a repeatable service. The launch signaled intent to build a small fleet of servicing vehicles for GEO operations.

   • Intelsat
   • Space com

8. MEV-2 docks with active Intelsat 10-02

   Apr 12, 2021Labels: MEV-2, Intelsat 10-02

   MEV-2 docked with Intelsat 10-02 while the client satellite was still operating in its normal geostationary slot. This differed from MEV-1’s approach above GEO and demonstrated servicing in the operational GEO environment. The docking established another “first”: a servicer docking with an in-service commercial satellite at GEO to extend its life.

   • Northrop IR
   • SpaceNews

9. MEV program demonstrates two flight-proven servicings

   Apr 13, 2021Labels: Northrop Grumman, MEV program

   With MEV-1 supporting Intelsat 901 and MEV-2 attached to Intelsat 10-02, Northrop Grumman positioned MEV as an operational, repeatable GEO servicing capability. The company emphasized that MEVs dock to customer satellites and provide propulsion and attitude control (keeping the satellite pointed and stable) to extend operational life. This stage mattered because it turned “on-orbit servicing” into a service operators could plan around for fleet management.

   • Northrop
   • SpaceNews

10. Intelsat extends MEV partnership for continued operations

    May 23, 2024Labels: Intelsat, Northrop Grumman

    Intelsat and Northrop Grumman’s SpaceLogistics extended their relationship to keep using MEV-1 and MEV-2 services for additional years. This reflected a business decision: in some cases, extending a satellite’s operational life can be cheaper and faster than building, launching, and commissioning a replacement. The agreement reinforced MEV servicing as a practical tool for sustaining GEO fleets.

    • Via Satellite

11. MEV-1 moves Intelsat 901 to graveyard orbit

    Apr 9, 2025Labels: MEV-1, graveyard orbit

    After about five years of life-extension service, MEV-1 relocated Intelsat 901 to a “graveyard orbit,” a disposal region above the geostationary belt used to reduce interference risk with active satellites. This step is an important end-of-life practice for GEO satellites and shows how servicing can support responsible disposal as well as life extension. The move helped close the mission in a controlled way rather than leaving the satellite in an operational slot without fuel margin.

    • Intelsat

12. MEV-1 undocks from Intelsat 901, ending mission

    Apr 9, 2025Labels: MEV-1, undocking

    MEV-1 safely detached from Intelsat 901 after completing the life-extension contract and disposal maneuvers. The undocking marked the completion of a full commercial servicing cycle: approach, dock, operate as a combined stack, and then separate after placing the client satellite into its final orbit. This outcome provided a clear proof point that commercial in-orbit servicing could be performed and concluded without leaving the servicer permanently attached.

    • Intelsat
    • Northrop IR