Composante Spatiale Optique
| Names | CSO-1 CSO-2 CSO-3 |
|---|---|
| Mission type | Military reconnaissance |
| Operator | CNES / DGA |
| COSPAR ID | 2018-106A (CSO-1) 2020-104A (CSO-2) 2025-044A (CSO-3) |
| SATCAT no. | 43866 (CSO-1) 47305 (CSO-2) 63156 (CSO-3) |
| Mission duration | 10 years (planned) |
| Spacecraft properties | |
| Bus | CSO |
| Manufacturer | Airbus Defence and Space (satellite) Thales Alenia Space (optical payload) |
| Launch mass | 3,655 kg (8,058 lb) (CSO-1) 3,652 kg (8,051 lb) (CSO-2) |
| Start of mission | |
| Launch date | 19 December 2018, 13:37:00 UTC (CSO-1) 29 December 2020, 16:42:07 UTC (CSO-2) 6 March 2025, 16:24:26 UTC (CSO-3) |
| Rocket | Soyuz ST-A (CSO-1, CSO-2) Ariane 62 (CSO-3) |
| Launch site | Guiana Space Centre, ELS (CSO-1, CSO-2) Guiana Space Centre, ELA-4 (CSO-3) |
| Contractor | Progress Rocket Space Centre, Arianespace |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Sun-synchronous orbit |
| Altitude | 800 km (500 mi) (CSO-1) 480 km (300 mi) (CSO-2) 800 km (500 mi) (CSO-3) |
| Inclination | 98.6° (CSO-1/CSO-3) 97.3° (CSO-2) |
Composante Spatiale Optique (CSO; English: Optical Space Component) is a French military Reconnaissance satellite program of third generation. It replaces the Helios 2 satellites. It is sometimes referred to as the MUltinational Space-based Imaging System for Surveillance, Reconnaissance and Observation (MUSIS program).