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BeiDou Receivers
| COMPASS | |
|---|---|
| Title | BeiDou Receivers |
| 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 Receiver
The COMPASS User Segment consists of COMPASS/Beidou user terminals,[3] which receive Compass navigation signals, determine pseudoranges (and other observables) and solve the navigation equations in order to obtain their coordinates.
A COMPASS receiver is a user terminal capable of determining the user position, velocity and precise time (PVT) by processing the signal broadcasted by COMPASS satellites. It receives COMPASS navigation signals, determines pseudoranges (and other observables) and solves the navigation equations in order to obtain their coordinates. Any navigation solution provided by a GNSS receiver is based on the computation of its distance to a set of satellites, by means of extracting the propagation time of the incoming signals traveling through space at the speed of light, according to the satellite and receiver local clocks.[5] In June 2011, the test-beds for ground segment and also the test section of the user terminal development have been completed.[6] There is also international cooperation in terms of Compatibility and Interoperability between BeiDou and other GNSSs, which will lead to interoperable terminals compatible with other GNSSs.[3]
For completeness, the main characteristics of COMPASS signals are shown in the following table and figure, extracted from the presentation on the status of COMPASS in Munich Satellite Navition Summit 2011 by the China Satellite Navigation Office:[3]
The COMPASS services are further described in the article COMPASS Services.
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 d 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
- ^ J. Sanz Subirana, JM. Juan Zornoza and M. Hernández-Pajares, Global Navigation Satellite Systems: Volume I: Fundamentals and Algorithms
- ^ Compass system 10 months to complete a comprehensive test covering the Asia Pacific region next year China news, 20th June 2011.