Performance analysis of BDS-2, BDS-3, and GPS in relative positioning through short, medium, and long baselines

Zhenbei Xu; Jingfa Zhang; Aihui Li; Hongji Chen; Bilige Wuyun; Ruikai Jin

doi:10.1117/12.2667683

10 February 2023 Performance analysis of BDS-2, BDS-3, and GPS in relative positioning through short, medium, and long baselines

Zhenbei Xu, Jingfa Zhang, Aihui Li, Hongji Chen, Bilige Wuyun, Ruikai Jin

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Proceedings Volume 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022); 125520U (2023) https://doi.org/10.1117/12.2667683
Event: International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 2022, Kunming, China

Abstract

BDS-3 (Beidou System 3) reached global coverage in June 2020. In comparison with BDS-2 (Beidou system 2), BDS-3 has greatly improved in terms of satellite orbits, atomic clocks, and signal transmissions. BDS-3 is now being used widely in practice. This paper is focused on performance analysis of BDS-3 vs. BDS-2 and GPS. Six baselines of different lengths were selected to result in single-system multi-frequency relative positioning solutions from BDS-2, BDS-3, and GPS, respectively. The long baselines were resolved with using the random walk constraints on the residual atmospheric delay. The positioning performance of each system was analyzed against the atmospheric delay error and the convergence property of the floated ambiguity resolution. The experiments showed that the convergence speed of BDS-3 was twice as fast as BDS-2, and the average convergence speed was also faster than GPS, which was increased by about 2.7%. In comparison with BDS-2, the accuracy of BDS-3 was improved by about 40%, but the accuracy was 7% lower than GPS solution and the positioning stability of BDS-3 was also not as good as GPS.

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Zhenbei Xu, Jingfa Zhang, Aihui Li, Hongji Chen, Bilige Wuyun, and Ruikai Jin "Performance analysis of BDS-2, BDS-3, and GPS in relative positioning through short, medium, and long baselines", Proc. SPIE 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 125520U (10 February 2023); https://doi.org/10.1117/12.2667683

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KEYWORDS

Satellites

Global Positioning System

Satellite navigation systems

Troposphere

Error analysis

Satellite communications

Receivers

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