| Mission type | Navigation |
|---|---|
| COSPAR ID | 2010-036A |
| SATCAT no. | 36828 |
| Mission duration | 8 years |
| Spacecraft properties | |
| Bus | DFH-3 |
| Manufacturer | CAST |
| Start of mission | |
| Launch date | 31 July 2010, 21:30:04 UTC [1] |
| Rocket | Chang Zheng 3C |
| Launch site | Xichang LC-2 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geosynchronous |
| Perigee altitude | 35,653 kilometres (22,154 mi) |
| Apogee altitude | 35,924 kilometres (22,322 mi) |
| Inclination | 54.47 degrees |
| Period | 23.93 hours |
| Epoch | 25 December 2013, 12:35:30 UTC [2] |
Compass-IGSO1, also known as Beidou-2 IGSO1 is a Chinese navigation satellite which will become part of the Compass navigation system. It was launched in July 2010, and became the fifth Compass satellite to be launched after Compass-M1, G2, G1, and G3.
Compass-IGSO1 was launched at 21:30 GMT on 31 July 2010. [3] The launch used a Long March 3A carrier rocket, flying from the Xichang Satellite Launch Centre. The satellite is developed in the basis of the DFH-3 satellite platform and has a lifespan of 8 years.
The primary instrument aboard Compass-IGSO1 is a navigation system operating in the L-band. Compass-IGSO1 is the second satellite of the Compass navigation system with an optical synchronization link. The timing functionality is provided by two instruments on board the space segment, the Laser Time Transfer (LTT) instrument consisting of a corner-cube retroflector array (hexagonal shape 49 × 43 cm, 90 pcs, 33 mm diameter, 770 cm2 reflective area [4] ) and a single-photon avalanche diode based detector developed in cooperation with CTU. [5] The ground segment uses the dedicated Chinese satellite laser ranging network. The combination of traditional passive laser ranging with active single photon detection aboard produces data for the ground-to-space oscillator time-base with 10−11 s precision.
The BeiDou Navigation Satellite System is a Chinese satellite navigation system. It consists of two separate satellite constellations. The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System and also known as BeiDou-1, consisted of three satellites which, beginning in 2000, offered limited coverage and navigation services, mainly for users in China and neighboring regions. BeiDou-1 was decommissioned at the end of 2012. On 23 June 2020, the final BeiDou satellite was successfully launched, the launch of the 55th satellite in the Beidou family. The third iteration of the Beidou Navigation Satellite System provides for global coverage for timing and navigation, offering an alternative to Russia's GLONASS, the European Galileo positioning system, and the US's GPS.
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