Precise Point Positioning Using GPS and Compass Observations
The Compass Navigation Satellite system, which currently provides more than 12 satellites with three carrier signals, already satisfies the requirement of stand-alone positioning in the Asia–Pacific regional area. First an initial introduction and perform
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Precise Point Positioning Using GPS and Compass Observations Wei Li, Peter Teunissen, Baocheng Zhang and Sandra Verhagen
Abstract The Compass Navigation Satellite system, which currently provides more than 12 satellites with three carrier signals, already satisfies the requirement of stand-alone positioning in the Asia–Pacific regional area. First an initial introduction and performance assessment of dual-frequency un-differenced precise point positioning (PPP) for GPS and Compass is presented, the results of which indicate that centimeter-level positioning accuracy of Compass-PPP is comparable to that of GPS-PPP. Then the combined GPS ? Compass dual-frequency PPP model is introduced, followed by a numerical performance analysis and comparison with single GNSS-PPP. The results show that the combined GPS ? Compass PPP can shorten the convergence time, but not necessarily improve positioning results by much if the satellites of the single GNSS system already have a good receiver-satellite geometry. Keywords GPS GNSS
Compass GPS ? Compass, PPP Dual and triple-frequency
W. Li (&) School of Geodesy and Geomatics, Wuhan University, Wuhan, China e-mail: [email protected] W. Li Chinese Academy of Surveying and Mapping, Beijing, China P. Teunissen B. Zhang GNSS Research Centre, Department of Spatial Sciences, Curtin University, Perth, Australia e-mail: [email protected] S. Verhagen Department of Remote Sensing and Geoscience, Delft University of Technology, Delft, The Netherlands
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 244, DOI: 10.1007/978-3-642-37404-3_33, Ó Springer-Verlag Berlin Heidelberg 2013
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33.1 Introduction The Compass Navigation Satellite System is a global navigation satellite system, which is independently deployed and operated by China and still in development. Currently, Compass system consists of fifteen operational satellites transmitting navigation signals at three frequency bands (B1, B2, B3), including five operational Geostationary Orbit (GEO) satellites, five Inclined Geosynchronous Orbit (IGSO) satellites, and five Medium Earth Orbit (MEO) satellites. This enables Compass system to provide navigation service in the Asia–Pacific regional area; by 2020, a global navigation service will be achieved eventually. Worldwide users will be able to have access to services of Compass for positioning, navigation and timing (PNT), and also take advantage of multi-frequency observations from multi-GNSS systems to greatly enhance observation redundancy and the navigation performance [16]. With the increasing development of Compass system, it draws enormous interest and attention of the scientific community. Based on simulated data, Chen et al. [3] and Yang et al. [16] pointed out the contribution of Compass to user’s PNT by analysis of visible satellites and dilution of precision (DOP) values. Absolute and relative positioning tests were also performed using simulated Compass observati
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