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Influencing Factors of GNSS Differential Inter-System Bias and Performance Assessment of Tightly Combined GPS, Galileo, and QZSS Relative Positioning for Short Baseline

Published online by Cambridge University Press:  27 December 2018

Mingkui Wu ,
Xiaohong Zhang ,
Wanke Liu ,
Renpan Wu ,
Renlan Zhang ,
Yuan Le  and
Yuexia Wu
Mingkui Wu
Affiliation:
(Faculty of Information Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, 430074, P.R. China)
Xiaohong Zhang
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, 430079, P.R. China) (Collaborative Innovation Centre for Geospatial Technology, 129 Luoyu Road, Wuhan, 430079, P.R. China) (Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan, 430079, P.R. China)
Wanke Liu*
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, 430079, P.R. China) (Collaborative Innovation Centre for Geospatial Technology, 129 Luoyu Road, Wuhan, 430079, P.R. China) (Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan, 430079, P.R. China)
Renpan Wu
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, 430079, P.R. China)
Renlan Zhang
Affiliation:
(Faculty of Information Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, 430074, P.R. China)
Yuan Le
Affiliation:
(Faculty of Information Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, 430074, P.R. China)
Yuexia Wu
Affiliation:
(Faculty of Information Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, 430074, P.R. China)
*
(E-mail: wkliu@sgg.whu.edu.cn)
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Abstract

This paper first investigates the influencing factors of between-receiver Differential Inter-System Bias (DISB) between overlapping frequencies of the Global Positioning System (GPS), Galileo and the Quasi-Zenith Satellite System (QZSS). It was found that the receiver reboot and the type of observations may have an impact on DISBs. The impact of receiver firmware upgrades and the activation of anti-multipath filters are also investigated and some new results are presented. Then a performance evaluation is presented of tightly combined relative positioning for a short baseline with GPS/Galileo/QZSS L1-E1-L1/L5-E5a-L5 observations with the current constellations, in which the recently launched Galileo and QZSS satellites will also be included. It is demonstrated that when DISBs are a priori calibrated and corrected, the tightly combined model can deliver a much higher empirical ambiguity resolution success rate and positioning accuracy with respect to the classical loosely combined model, especially under environments where the observed satellites for each system are limited and only single-frequency observations are available. The ambiguity dilution of precision, bootstrapping success rate, and ratio values are analysed to illustrate the benefits of the tightly combined model as well.

Keywords

GPSGalileoQZSSTightly combined modelDifferential Inter-System Bias (DISB)Relative positioning
Type
Research Article
Information
The Journal of Navigation , Volume 72 , Issue 4 , July 2019 , pp. 965 - 986
Copyright
Copyright © The Royal Institute of Navigation 2018 

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