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BeiDou Services
| COMPASS | |
|---|---|
| Title | BeiDou Services |
| Author(s) | GMV. |
| Level | Basic |
| Year of Publication | 2011 |
The Compass Navigation Satellite System (CNSS), also named BeiDou-2,[1] is China’s second-generation satellite navigation system that will be capable of providing positioning, navigation, and timing services to users on a continuous worldwide basis.[1][2]
Although the upgrade of its regional navigation system towards a global solution started in 1997, the formal approval by the Government of the development and deployment of BeiDou-2/CNSS was done in 2004.[1] The system is currently under development evolving from a regional system called BeiDou-1, and in the first phase will provide high-accuracy positioning services for users in China and its neighbouring regions by 2012.[1] In a second stage, the system will evolve to provide global navigation services by 2020, similarly to the GPS, GLONASS or Galileo systems.[1]
As of August 2011, nine satellites for Compass have been launched, the first eight of which completed the deployment foreseen for the first phase of BeiDou-2.[1][3][4]
COMPASS Services
By April 2011, the initial phase of COMPASS system has been completed with a constellation of 4 GEO satellites and 3 IGSO satellites. During 2011, the system is going to launch another 4 Beidou Navigation Satellites, providing for the whole Asia-Pacific region:[3]
- initial passive positioning navigation;
- timing service;
- and short message communication (120 Chinese characters per message) service.
The aim of the first phase (completion expected by end of 2012) is to provide two types of services:[3]
- Open Service: a free service for civilian users with positioning accuracy of within 10 metres, velocity accuracy of within 0.2 m/s and timing accuracy of within 20 nanoseconds;
- Authorized Service: a licensed service with higher accuracy even in complex situations for authorised and military users only.
Although in this first phase the system will only cover China and its neighbouring countries, the Compass system is scheduled to extend into a global navigation system by 2020, this implies a continuous improvement of performances around the world in order to provide a global, free, high quality, reliable service.
Notes
References
- ^ a b c d e f Compass Satellite Navigation System (Beidou), on Sinodefence.com, updated on August 6th, 2011.
- ^ COMPASS Navigation system in Wikipedia
- ^ a b c China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011.
- ^ China completes basic Beidou (Compass) Navigation Satellite System, 2011-04-10 by Globaltimes.cn