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The First Result of Relative Positioning and Velocity Estimation Based on CAPS
- Source :
- Sensors (Basel, Switzerland), Sensors; Volume 18; Issue 5; Pages: 1528
- Publication Year :
- 2018
- Publisher :
- MDPI AG, 2018.
-
Abstract
- The Chinese Area Positioning System (CAPS) is a new positioning system developed by the Chinese Academy of Sciences based on the communication satellites in geosynchronous orbit. The CAPS has been regarded as a pilot system to test the new technology for the design, construction and update of the BeiDou Navigation Satellite System (BDS). The system structure of CAPS, including the space, ground control station and user segments, is almost like the traditional Global Navigation Satellite Systems (GNSSs), but with the clock on the ground, the navigation signal in C waveband, and different principles of operation. The major difference is that the CAPS navigation signal is first generated at the ground control station, before being transmitted to the satellite in orbit and finally forwarded by the communication satellite transponder to the user. This design moves the clock from the satellite in orbit to the ground. The clock error can therefore be easily controlled and mitigated to improve the positioning accuracy. This paper will present the performance of CAPS-based relative positioning and velocity estimation as assessed in Beijing, China. The numerical results show that, (1) the accuracies of relative positioning, using only code measurements, are 1.25 and 1.8 m in the horizontal and vertical components, respectively; (2) meanwhile, they are about 2.83 and 3.15 cm in static mode and 6.31 and 10.78 cm in kinematic mode, respectively, when using the carrier-phase measurements with ambiguities fixed; and (3) the accuracy of the velocity estimation is about 0.04 and 0.11 m/s in static and kinematic modes, respectively. These results indicate the potential application of CAPS for high-precision positioning and velocity estimation and the availability of a new navigation mode based on communication satellites.
- Subjects :
- 010504 meteorology & atmospheric sciences
Positioning system
Computer science
BeiDou Navigation Satellite System
Ground control station
01 natural sciences
Biochemistry
Article
Chinese Area Positioning System (CAPS)
Transponder (aeronautics)
Analytical Chemistry
0103 physical sciences
relative positioning
velocity estimation
Electrical and Electronic Engineering
010303 astronomy & astrophysics
Instrumentation
0105 earth and related environmental sciences
Transponder
Geosynchronous orbit
Geodesy
Atomic and Molecular Physics, and Optics
Orbit
Orbit (dynamics)
Communications satellite
Satellite
Subjects
Details
- ISSN :
- 14248220
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- Sensors
- Accession number :
- edsair.doi.dedup.....4c477d842e55889b9376f185808ab1c3