DORIS (satellite system)
| The DORIS antenna and receiver installed onboard OSTM/Jason-2 satellite | |
| Country/ies of origin | France | 
|---|---|
| Operator(s) | CNES | 
| Type | Civilian | 
| Status | Operational | 
| Constellation size | |
| Nominal satellites | 0 (ground transmitters only) | 
| First launch | 1990 | 
DORIS is a French satellite system used for the determination of satellite orbits (e.g. TOPEX/Poseidon) and for positioning. The name is an acronym of "Doppler Orbitography and Radiopositioning Integrated by Satellite" or, in French, Détermination d'Orbite et Radiopositionnement Intégré par Satellite.