Precise Point Positioning Using Combined Beidou and GPS Observations
By the end of year 2012, China has launched 16 Beidou-2/Compass-2 navigation satellites that include 6 GEO, 5IGSO and 5 MEO. Initial navigation and precise pointing services ability has formed in the Asian-Pacific regions. In order to know the navigation
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Precise Point Positioning Using Combined Beidou and GPS Observations Lizhong Qu, Qile Zhao, Min Li, Jing Guo, Xing Su and Jingnan Liu
Abstract By the end of year 2012, China has launched 16 Beidou-2/Compass-2 navigation satellites that include 6 GEO, 5IGSO and 5 MEO. Initial navigation and precise pointing services ability has formed in the Asian-Pacific regions. In order to know the navigation and positioning performance of Beidou-2 system, Wuhan University has built up a Beidou Experimental Tracking Stations over the world and extents the PANDA software to determine the orbits of Beidou satellites, that supplies the Beidou satellites’ precise orbit and satellite clock offset for the users needing high accuracy positioning services. This article uses the Beidou/GPS observations of the Beidou Experimental Tracking Stations to realize the Beidou and Beidou/GPS static and kinematic precise point positioning (PPP). The result indicates that the precision of Beidou static and kinematic PPP reaches centimeter level, the precision of combined Beidou/GPS static and kinematic PPP improves than that of both only-Beidou and only-GPS and the convergence time is less than that of both only-Beidou and only-GPS.
Keywords Beidou satellite navigation system Beidou experimental tracking stations PNADA Beidou/GPS Precise point positioning (PPP)
22.1 Introduction On Oct. 25 of year 2012, the 16th Beidou-2 navigation satellite is launched successfully, indicating that the Beidou region navigation satellite system has been initially built up and the preliminary ability of navigation and high accuracy positioning services has formed in Asian-Pacific regions. The scholars both at home and L. Qu (&) Q. Zhao M. Li J. Guo X. Su J. Liu GNSS Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China e-mail: [email protected]
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 245, DOI: 10.1007/978-3-642-37407-4_22, Ó Springer-Verlag Berlin Heidelberg 2013
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abroad have a large of researches on the precise orbit determination and the static precise positioning. Shi et al. [1] have researched on the precise orbit determination of Beidou satellites and the Beidou PPP by using the precise orbit and satellites clock error productions. The observations come from the Beidou Experimental Tracking Stations and the software platform is PANDA while the constellation of Beidou system had just 6 satellites at that time. The RMS of the difference in the radial components are smaller than 10 cm and the static daily PPP COMPASS solutions show an accuracy of 2 cm in horizontal and 7 cm in vertical. Hauschild et al. [2] used the Satellite Laser Ranging (SLR) tracking data to determine the orbit of Beidou M01 with 7 days arc length. The RMS of the 3-D overlap error varies from 11 to 50 cm in the selected periods. Montenbruck et al. [3] researched on the Beidou PPP and the errors in the horizontal and vertical position components of st
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