
The construction of the BeiDou system was divided into three stages. At the end of 2000, the BDS-1 system was built to provide services to China. At the end of 2012, the BDS-2 system was built to provide services to the Asia-Pacific region, and around 2020, the BDS-3 system will be built to provide services to the world.
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BDS-1 Constellation
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BDS-2 Constellation
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BDS-3 Constellation
The BDS is mainly comprised of three segments: space segment, ground segment and user segment.
The BDS space segment is a hybrid navigation constellation consisting of GEO, IGSO and MEO satellites.
The basic constellation of BDS-2 is 5GEO+5IGSO+4MEO.
BDS-3 is composed of 3GEO+3IGSO+24MEO constellation, which has communication capability between satellites and satellites, and can operate independently without ground station support.
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BDS GEO
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BDS MEO
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The BDS ground segment consists of various ground stations, including master control stations, time synchronization/uplink stations, and monitoring stations.



The BDS user segment consists of various kinds of BDS terminals, chips, modules and antennae, as well as application systems and application services.


