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Performance Analysis for BDS Phase-smoothed Pseudorange Differential Positioning

Published online by Cambridge University Press:  28 March 2016

Weiming Tang ,
Jianhui Cui ,
Mengtang Hui  and
Chenlong Deng
Weiming Tang*
Affiliation:
(GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China)
Jianhui Cui
Affiliation:
(GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China)
Mengtang Hui
Affiliation:
(GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China)
Chenlong Deng
Affiliation:
(GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China) (School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China)
*
(E-mail: wmtang@whu.edu.cn)
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Abstract

The positioning accuracy of the BeiDou Navigation Satellite System (BDS) can reach up to 10 m (95% confidence level) in both horizontal and vertical components. In order to improve the positioning performance for metre-level navigation, BDS pseudorange differential positioning has been proposed. We introduce the basic principles of BDS pseudorange differential positioning. Then based on the traditional Hatch filter, a modified Hatch filter for dual-frequency phase-smoothed pseudorange is introduced. The phase-smoothed pseudorange differential positioning, whose observations are smoothed by the modified Hatch filter using BDS B1 and B3 and Global Positioning System (GPS) L1 and L2 carrier-phase observations, are applied to determine the roving station's position. Three strategies are used for results analysis. The results show that the longer the baseline length is, the poorer positioning accuracy gets, and the positioning accuracy decline rate of the BDS B3 signal is higher than that of the BDS B1 signal, especially for long baselines. The percentages of the position deviations less than 3 m in horizontal component and 5 m in vertical component for BDS signals can reach up to 95 %.

Keywords

BDSPhase-smoothed pseudorange differential positioningDual-frequency phase smoothingBaseline length
Type
Research Article
Information
The Journal of Navigation , Volume 69 , Issue 5 , September 2016 , pp. 1011 - 1023
Copyright
Copyright © The Royal Institute of Navigation 2016 

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