Robots Are Now Repairing Satellites in Space

High above Earth, robotic spacecraft are now undertaking missions to extend the lifespan of satellites. This week, a Northrop Grumman Mission Extension Vehicle (MEV) detached from an Optus communications satellite after over a year of service. It is making way for newer technology.

Four new Northrop spacecraft, including the advanced Mission Robotic Vehicle (MRV) and three Mission Extension Pods (MEPs), launched in July via a SpaceX Falcon 9 rocket. These vehicles are en route to geosynchronous orbit, where the MRV will attach an MEP to the Optus satellite by 2027, potentially extending its operational life by years.

Satellites typically fail due to lack of fuel for station-keeping, not equipment malfunction. The Optus satellite, launched in 2009, could see its revenue-generating period extended by six years thanks to this life-extension service. This innovation is driven by decreasing launch costs and component prices.

Cassie Wong, Northrop's director of logistics and servicing, stated the goal is a sustainable space paradigm with resilient infrastructure, enabling repairs, life extension, and upgrades. Currently, two MEVs have provided a decade of extended life to three customers, including Intelsat and Optus satellites.

The MRV represents an evolution, with satellite operators owning MEPs, freeing the MRV for more missions and reducing costs. The technology involves complex autonomous docking at high speeds. The MRV is also designed for in-orbit refueling, a capability envisioned for future servicing norms.

While Starlink and Amazon LEO employ swarms of cheap, replaceable satellites, the MRV addresses the need to maintain expensive, large satellites already in orbit. Future missions could include adding components or adjusting orbits, with potential defense applications due to DARPA's involvement in the MRV's robotic arms.