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You are here: Home / Featured / Spain supporting ESA satellite removal mission CAT

Spain supporting ESA satellite removal mission CAT

May 20, 2025 by editorial

Earlier this month, ESA and the Spanish Space Agency (Agencia Espacial Española or AEE) confirmed their intent to collaborate on the proposed CApTure Payload Bay (CAT) on-orbit demo—this mission will test a standardized docking interface that will simplify satellite removal operations.

Space debris mitigation guidelines outline that a satellite should be able to maneuver itself out of valuable orbits, either to reenter the atmosphere and burn up, or else to park itself in a so-called graveyard orbit. Yet even the most reliable of satellites may fail on-orbit and become uncontrollable, becoming a collision risk to other satellites.

Active debris removal techniques, where a second satellite captures and removes an incapacitated satellite or other debris, are complex. Approaching and docking to another satellite is always a risk, as any collision can lead to more damage and debris generation. It becomes even more complicated if the spacecraft is unprepared, meaning not designed to rendezvous and be ‘towed’. A rendezvous in space requires compatible interfaces A rendezvous in space requires compatible interfaces Using standardized interfaces

ESA has started to prepare its satellites with standard interfaces for capture and removal to simplify active debris removal missions. As anyone who has experienced the hassle of different charging cables before they were standardized to USB-C knows: for efficient interoperability of hardware, you need matching interfaces.

In September of 2024, Spanish company AVS successfully launched their LUR-1 mission that, among other new technologies, carries the joint technology demonstration with ESA of the Mechanical Interface for Capture at End-of-life (MICE) as well as other navigation aids that will help precise distance and orientation determination needed during the close-proximity navigation.

Artistic rendition of the LUR-1 satellite on-orbit, courtesy of AVS.

The MICE interface is a point of attachment put onto the satellite so CAT can easily grab it, similar to how cars have tow hooks. Six navigation aids have also been installed on LUR-1 to support the rendezvous and capture process by helping determine the distance, orientation and any tumbling of the spacecraft.

Mechanical Interface for Capture at End-of-life (MICE), image courtesy of AVS

MICE and the navigation aids are also being installed on four of the future Copernicus Expansion missions to facilitate their removal from orbit in case of a failure that would prevent any of them from leaving orbit under their own steam. With MICE in space, ESA must send a CAT robotic assembly.

The next step is to demonstrate the removal operations on-orbit by sending the CAT side of the standardized interfaces into space, as well. The CAT payload is currently being developed under the leadership of GMV in Spain. It is compatible with ESA’s design for the removal interface and combines innovative robotics with relative navigation equipment for tight close-proximity operations.

CAT Robotic Assembly, image courtesy of GMV

CAT will then undergo end-to-end validation during the ESA CAT in-orbit mission. The demonstration will make active removal a reliable and more affordable option for future ESA satellites, in case of failures in a congested orbit.

The mission is proposed for implementation within the Space Safety Programme Proposal in view of the ESA Council meeting at Ministerial level in November of 2025.

ESA and the Spanish Space Agency (AEE) affirmed their intent on May 16, 2025, to collaborate by considering the Spanish LUR-1 satellite as a candidate target for the ESA CAT mission. As LUR-1 already has MICE onboard, ESA’s CAT mission can aim to safely remove the LUR-1 satellite from its low-Earth orbit in a timely manner after it reaches its end-of-mission.

Spain and ESA coming together to collaborate on the CAT on-orbit demonstration would form a key stepping stone to make the ESA Zero Debris goal possible and constitute significant progress in enhancing safety and sustainability in space.

Filed Under: Featured, News

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