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A Model for Combined GPS and BDS Real-Time Kinematic Positioning using one Common Reference Ambiguity

Published online by Cambridge University Press:  06 March 2018

Rui Tu ,
Jinhai Liu ,
Rui Zhang ,
Pengfei Zhang  and
Xiaochun Lu
Rui Tu*
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, 710600, Xi'An, China) (University of Chinese Academy of Sciences, Yu Quan Road, 100049, Bei'Jing, China) (Key laboratory of precision navigation and timing technology, Chinese academy of sciences, Shu Yuan Road, 710600, Xi'An, China)
Jinhai Liu
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, 710600, Xi'An, China) (University of Chinese Academy of Sciences, Yu Quan Road, 100049, Bei'Jing, China)
Rui Zhang
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, 710600, Xi'An, China) (Key laboratory of precision navigation and timing technology, Chinese academy of sciences, Shu Yuan Road, 710600, Xi'An, China)
Pengfei Zhang
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, 710600, Xi'An, China) (University of Chinese Academy of Sciences, Yu Quan Road, 100049, Bei'Jing, China)
Xiaochun Lu
Affiliation:
(National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, 710600, Xi'An, China) (University of Chinese Academy of Sciences, Yu Quan Road, 100049, Bei'Jing, China) (Key laboratory of precision navigation and timing technology, Chinese academy of sciences, Shu Yuan Road, 710600, Xi'An, China)
*
(E-mail: turui-2004@126.com)
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Abstract

This paper proposes a model for combined Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS) Real-Time Kinematic (RTK) positioning. The approach uses only one common reference ambiguity, for example, that of GPS L1, and estimates the pseudo-range and carrier phase system and frequency biases. The validations show that these biases are stable during a continuous reference ambiguity period and can be easily estimated, and the other estimated double-differenced ambiguities, such as those of GPS L2, BDS L1, and BDS L2, are not affected. Therefore, our approach solves the problems of a frequently changing reference satellite. In addition, because all the carrier phase observations use the same reference ambiguity, a relationship is established between the different systems and frequencies, and the strength of the combined model is thus increased.

Keywords

GPSBDSRTKReference ambiguity
Type
Research Article
Information
The Journal of Navigation , Volume 71 , Issue 4 , July 2018 , pp. 1011 - 1024
Copyright
Copyright © The Royal Institute of Navigation 2018 

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