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Open AccessArticle

Calibration of BeiDou Triple-Frequency Receiver-Related Pseudorange Biases and Their Application in BDS Precise Positioning and Ambiguity Resolution

1
School of Electronic and Information Engineering, Beihang University, 37 Xueyuan Road, Beijing 100083, China
2
GNSS Research Center, Wuhan University, Luoyu Road 129, Wuhan 430079, China
3
BeiDou Belt and Road School, Beihang University, 37 Xueyuan Road, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(16), 3500; https://doi.org/10.3390/s19163500
Received: 12 July 2019 / Revised: 7 August 2019 / Accepted: 7 August 2019 / Published: 10 August 2019
(This article belongs to the Collection Positioning and Navigation)
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Abstract

Global Navigation Satellite System pseudorange biases are of great importance for precise positioning, timing and ionospheric modeling. The existence of BeiDou Navigation Satellite System (BDS) receiver-related pseudorange biases will lead to the loss of precision in the BDS satellite clock, differential code bias estimation, and other precise applications, especially when inhomogeneous receivers are used. In order to improve the performance of BDS precise applications, two ionosphere-free and geometry-free combinations and ionosphere-free pseudorange residuals are proposed to calibrate the raw receiver-related pseudorange biases of BDS on each frequency. Then, the BDS triple-frequency receiver-related pseudorange biases of seven different manufacturers and twelve receiver models are calibrated. Finally, the effects of receiver-related pseudorange bias are analyzed by BDS single-frequency single point positioning (SPP), single- and dual-frequency precise point positioning (PPP), wide-lane uncalibrated phase delay (UPD) estimation, and ambiguity resolution, respectively. The results show that the BDS SPP performance can be significantly improved by correcting the receiver-related pseudorange biases and the accuracy improvement is about 20% on average. Moreover, the accuracy of single- and dual-frequency PPP is improved mainly due to a faster convergence when the receiver-related pseudorange biases are corrected. On the other hand, the consistency of wide-lane UPD among different stations is improved significantly and the standard deviation of wide-lane UPD residuals is decreased from 0.195 to 0.061 cycles. The average success rate of wide-lane ambiguity resolution is improved about 42.10%. View Full-Text
Keywords: BDS; pseudorange bias; triple-frequency; single point positioning; ambiguity resolution BDS; pseudorange bias; triple-frequency; single point positioning; ambiguity resolution
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Zheng, F.; Gong, X.; Lou, Y.; Gu, S.; Jing, G.; Shi, C. Calibration of BeiDou Triple-Frequency Receiver-Related Pseudorange Biases and Their Application in BDS Precise Positioning and Ambiguity Resolution. Sensors 2019, 19, 3500.

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