Operator TypesISOS
In-Space Service Operator
An entity providing services to other spacecraft in orbit, including refueling, repair, debris removal, or life extension.
ISOS providers are a separate operator category in the EU Space Act proposal (COM(2025) 335, Art. 5(16)(d)); ISOS covers activities in space to provide services on assets in the space segment, such as inspection, rendezvous, docking, repair, refuelling, reconfiguration, manufacturing and assembling (Art. 5(63)).
Types of Services
- Life Extension: Attaching service modules to extend satellite operations
- Refueling: Replenishing propellant in orbit
- Repair and Maintenance: Fixing malfunctioning components
- Inspection: Close-proximity assessment of space objects
- Active Debris Removal: Capturing and deorbiting debris
Regulatory Challenges ISOS operations raise unique regulatory questions:
- Liability for damage during servicing
- Authorization for proximity operations
- Insurance requirements for third-party spacecraft
- Cybersecurity for cross-spacecraft communications
EU Space Act proposal (COM(2025) 335, not in force)
- ISOS providers would need an authorisation like other Union space operators (Art. 6)
- The ISOS requirements of Art. 101 and Annex VIII would apply from 1 January 2034 (Art. 101(1))
- Spacecraft of Union-owned assets above the mini-satellite class would need dedicated Spacecraft Service Interfaces (Art. 101(2)-(3))
- Details, including active debris removal, would follow from delegated and implementing acts (Art. 101(4)-(5))
- The proposal contains no insurance minimums
Market Growth The in-space servicing market is projected to grow significantly as satellite life extension becomes economically attractive.