The Performance Analysis of Multi-system Integrated Precise Point Positioning (PPP)
Based on the analysis of the GNSS navigation and positioning, this paper studies the key technology and superiority of the PPP based on single difference between satellites. The true observation data are used to compare and analyze the precision and conve
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Abstract Based on the analysis of the GNSS navigation and positioning, this paper studies the key technology and superiority of the PPP based on single difference between satellites. The true observation data are used to compare and analyze the precision and convergence time of PPP based on GPS\GLONASS, GPS\BDS dual system, and GPS\GLONASS\BDS triple system. Finally, the conclusion is drawn as the following: GPS\GLONASS\BDS triple-system PPP technology has the optimal performance on positioning accuracy and convergence time. GPS\GLONASS dual-system PPP almost has the same performance with triple-system PPP. GPS \BDS has no impact on improving performance of GPS PPP, but can improve the performance of BDS PPP greatly. Keywords PPP
GNSS GPS BDS GLONASS
1 Introduction PPP technology does not need the reference station, its operation is flexible and its positioning accuracy is high. It can directly obtain the coordinates of the stations which are consistent with the ITRF framework. So, PPP technology research has become a hot spot. Especially with the operation of Beidou system of our country, the research and analysis on BDS PPP become gradually increased. Literature [1] shows that BDS PPP can only achieve dm level positioning accuracy because of the lower precision of precise satellite orbit and clock. But, Literature [2] shows that precise orbit radial accuracy of BDS satellite is less than 10 cm, and the PPP L. Huang (&) B. Li G. Xin W. An X. Zhou China Aerospace Surveying and Mapping Satellite Center, Beijing, China e-mail: [email protected] L. Huang Z. Lu H. Lv N. Wang Information Engineering University, Zhengzhou, China L. Huang State Key Laboratory of Geo-Information Engineering, Xi’an, China © Springer Science+Business Media Singapore 2016 J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2016 Proceedings: Volume III, Lecture Notes in Electrical Engineering 390, DOI 10.1007/978-981-10-0940-2_28
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can reach cm level accuracy. Through comparing the performance of BDS and GPS PPP, literature [3] shows that dynamic and static BDS PPP can finish convergence in 100–80 min, and can realize the cm and dm level absolute positioning accuracy. No matter the performance of BDS PPP, according to some studies, single-system PPP still exists the following problems: (1) in the occlusion area where the number of visible satellites is less, the worse geometric structure of space satellite easily leads to lower positioning accuracy; (2) because the ambiguity, position parameters, the receiver clock, and troposphere delay cannot be efficiently separated within a short period of time, the convergence time will be longer. So, scholars begin to study the strength of dual-system combination PPP technology. Literatures [4–6] show that, when the GPS satellite is less, the increase of GLONASS satellites can effectively improve the convergence speed and positioning accuracy of GPS PPP. With the operation of our BDS system and the improving of GLONASS satellite constellation,
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