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Star trackers & reaction wheels
Limeil-Brévannes, France48.75°N 2.47°E
computed criticality10/100
reading
Star trackers: ~75% of the world market held by 3 European firms (Sodern, Leonardo, Jena Optronik); reaction wheels, few suppliers
2024Fault line
To orient and point itself, a satellite depends on star trackers and reaction wheels made by a few specialists. Niche components whose faulty batch can delay entire programmes.
Actors
Sodern (ArianeGroup)
Leonardo
Jena Optronik
Ball Aerospace
Sources