Initial Assessment of Tightly Combined Relative Positioning for Short Baselines with Observations from GPS, Galileo, and BDS-3 Experimental Satellites

WU Mingkui; LIU Wanke; ZHANG Xiaohong; TIAN Wenwen

doi:10.13203/j.whugis20180269

Volume 45 Issue 1

Jan. 2020

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Geomatics and Information Science of Wuhan University > 2020 > 45(1): 13-20. > DOI: 10.13203/j.whugis20180269

WU Mingkui, LIU Wanke, ZHANG Xiaohong, TIAN Wenwen. Initial Assessment of Tightly Combined Relative Positioning for Short Baselines with Observations from GPS, Galileo, and BDS-3 Experimental Satellites[J]. Geomatics and Information Science of Wuhan University, 2020, 45(1): 13-20. DOI: 10.13203/j.whugis20180269

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Initial Assessment of Tightly Combined Relative Positioning for Short Baselines with Observations from GPS, Galileo, and BDS-3 Experimental Satellites

WU Mingkui^1,,
LIU Wanke^{2, 3, ,},
ZHANG Xiaohong^{2, 3},
TIAN Wenwen¹

1.
School of Geography and Information Engineering, China University of Geosciences(Wuhan), Wuhan 430074, China
2.
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
3.
Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, China

Funds:

The National Natural Science Foundation of China 41774031

The National Natural Science Foundation of China 41904035

The National Natural Science Foundation of China 91638203

the Natural Science Foundation of Hubei Province 2019CFB261

the National Key Research and Development Program of China 2017YFB0503402

Wuhan Science and Technology Project 2018010401011270

the Fundamental Research Funds for Central Universities, China University of Geosciences(Wuhan) G1323541876

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Author Bio:
WU Mingkui, PhD, lecturer, specializes in multi-frequency multi-GNSS precise positioning and its applications. E-mail: wumk@cug.edu.cn
Corresponding author:
LIU Wanke, PhD, professor. E-mail: wkliu@sgg.whu.edu.cn
Received Date: October 10, 2018
Published Date: January 04, 2020

Graphical Abstract

Abstract

Abstract

The experimental satellites of BeiDou global navigation satellite system (BDS-3) broadcast new B1C/B2a/B2b signals that overlap with GPS L1/L5 signals and European Galileo E1/E5a/E5b signals, which provides the opportunity of tightly combined relative positioning for short baselines with observations from GPS, Galileo, and BDS-3 experimental satellites. In this contribution, we first evaluate the value and time-domain stability of differential inter-system bias (DISB) between overlapping frequencies of GPS, Galileo, and BDS-3. The results show that the DISB of the same type of receiver is close to 0, and its influence can be ignored in the tightly combined relative positioning. Then we preliminarily evaluated performance of single-epoch tightly combined relative positioning for short baselines with observations from GPS, Galileo, and BDS-3 experimental satellites. The results show that, compared with the traditional loosely combined model, the tightly combined model can significantly improve the success rate and reliability of ambiguity resolution. The improvement is especially significant (approximately 25%-45%) under environments where the observed satellites for each system are limited and only single-frequency observations are available.
- BeiDou global navigation satellite system,
- GPS,
- Galileo,
- tightly combined relative positioning,
- differential inter-system bias

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References (18)

References

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Initial Assessment of Tightly Combined Relative Positioning for Short Baselines with Observations from GPS, Galileo, and BDS-3 Experimental Satellites

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