Names | CSO-1 CSO-2 CSO-3 |
---|---|
Mission type | Military reconnaissance |
Operator | CNES / DGA |
COSPAR ID | 2018-106A (CSO-1) 2020-104A (CSO-2) |
SATCAT no. | 43866 (CSO-1) 47305 (CSO-2) |
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) 2024 (planned) (CSO-3) |
Rocket | Soyuz ST-A (CSO-1, CSO-2) Ariane 62 (CSO-3) |
Launch site | Centre Spatial Guyanais, ELS and ELA-4 |
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) |
Inclination | 97.3° |
Composante Spatiale Optique (CSO; English: Optical Space Component) is a French military Earth observation 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).
Since the launch of Helios 1A in 1995, France has developed a series of military Earth observation programs. Due to the limited lifetime of satellites, a program was launched to replace the currently operational Helios 2 satellites. This program started as a French contribution to the larger pan-European MUSIS program, and eventually became a mostly French program. [1] An agreement between France and Germany was reached in April 2015, under which Germany contributes €200 million to building a third satellite, and in exchange receives access rights to the imagery. [2] [3] Sweden and Belgium are also a program partners, which enables the use of a polar ground station. [4] [5]
Unlike the Helios satellites, which used the same bus as the Spot satellites, CSO uses technology derived from the Pléiades satellites. It is much heavier than Pléiades with a mass of 3650 kg. [6] They are made out of 3 identical satellites. The first one was launched in December 2018, and provide Very High Resolution imagery - like the Helios 2 satellites, [7] so around 35 cm [8] from an 800 km orbit. [9] The second satellite provides Extremely High Resolution imagery - around 20 cm - from a 480 km orbit. [6] The third satellite will be launched in 2024 and provide increased revisit capabilities. [10] [11] The satellites have the ability to take infrared images. [12] The satellite manufacturing was awarded to Airbus Defence and Space, while the optical payload is built by Thales Alenia Space. [13]
The CSO system is able to produce at least 280 images a day on average. [4] [14]
The program cost is estimated at €1.3 billion, [1] with an additional €300 million for the ground segment and 10 years of operations. [15] The marginal cost of the third satellite is €300 million. [2]
The Guiana Space Centre, also called Europe's Spaceport, is a spaceport to the northwest of Kourou in French Guiana, a overseas region of France in South America. Kourou is located approximately 500 kilometres north of the equator at a latitude of 5°. In operation since 1968, it is a suitable location for a spaceport because of its near equatorial location and open sea to the east and north.
CNES is the French national space agency. Headquartered in central Paris, the agency comes under the supervision of the ministries of the Armed Forces, Economy and Finance and Higher Education, Research and Innovation.
SPOT is a commercial high-resolution optical Earth imaging satellite system operating from space. It is run by Spot Image, based in Toulouse, France. It was initiated by the CNES in the 1970s and was developed in association with the SSTC and the Swedish National Space Board (SNSB). It has been designed to improve the knowledge and management of the Earth by exploring the Earth's resources, detecting and forecasting phenomena involving climatology and oceanography, and monitoring human activities and natural phenomena. The SPOT system includes a series of satellites and ground control resources for satellite control and programming, image production, and distribution. Earlier satellites were launched using the European Space Agency's Ariane 2, 3, and 4 rockets, while SPOT 6 and SPOT 7 were launched by the Indian PSLV.
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Hélios 1A and Hélios 1B were French military photo-reconnaissance satellites in which Italy and Spain also participated. Hélios 1A was launched from the Guiana Space Centre, French Guiana on 3 December 1999 at 16:22:00 UTC. The spacecraft rode aboard an Ariane 4 rocket which also carried the French military reconnaissance satellite Clementine.
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The Pléiades constellation is composed of two very-high-resolution optical Earth-imaging satellites. Pléiades-1A and Pléiades-1B provide the coverage of Earth's surface with a repeat cycle of 26 days. Designed as a dual civil/military system, Pléiades will meet the space imagery requirements of European defence as well as civil and commercial needs.
The MUltinational Space-based Imaging System for Surveillance, Reconnaissance and Observation (MUSIS) is an international program including France, Italy, Belgium, Germany, Greece, and Spain, aimed at allowing the six nations to share imagery from various military satellites through a common, generic user ground segment (UGS) according to agreed rules and quota.
ELISA is a suite of four French military satellites launched on 17 December 2011 from Arianespace's Kourou spaceport in French Guiana. It consists of microsatellites ELISA 1, ELISA 2, ELISA 3, and ELISA 4
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