If you wish to contribute or participate in the discussions about articles you are invited to contact the Editor
BeiDou User Segment
| COMPASS | |
|---|---|
| Title | BeiDou User Segment |
| 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 User Segment
The COMPASS User Segment consists of COMPASS/Beidou user terminals, 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 device capable of determining the user position, velocity and precise time (PVT) by processing the signal broadcasted by COMPASS satellites. 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 system has completed the ground segment commissioning, and also the test section of the user terminal development has been completed[6]. There is also an international cooperation in terms of Compatibility and Interoperability between BeiDou and other GNSSs, that will lead to interoperable terminals compatible with other GNSSs.[7]
Applications
GNSS applications are all those applications that use a GNSS signals to collect position, velocity and time information to be used by the application. For instance, the position and velocity provided by a COMPASS user terminal may be used for different kinds of applications (civil, military, scientific) such as:[7]
- Fishery: Fishermen safety of life, Oceanic and economic security, Protection of marine resources and sovereignty.
- Disaster Prevention and Mitigation: improvement of rescue response and decision-making capability due to rapid and timely disaster alert, rescue command scheduling and rapid emergency communication.
- Timing: Beidou/GPS multi-mode time synchronization devices with embedded Beidou/GPS timing module.
- Transportation: fleet management.
- Water conservancy.
- Meteorology.
- Forest Fire Prevention.
- Soil Monitoring.
- Coal Mine Safety Monitoring.
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
- ^ 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.
- ^ a b COMPASS Status Presentation, Munich Satellite Navigation Summit March 2011.