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Benefit of Sparse Reference Network in BDS Single Point Positioning with Single-Frequency Measurements

Published online by Cambridge University Press:  23 November 2017

Xiaomin Luo ,
Yidong Lou ,
Xiaopeng Gong ,
Shengfeng Gu  and
Biyan Chen
Xiaomin Luo
Affiliation:
(GNSS Research Center, Wuhan University, Luoyu Road 129, Wuhan, Hubei 430079, China)
Yidong Lou*
Affiliation:
(GNSS Research Center, Wuhan University, Luoyu Road 129, Wuhan, Hubei 430079, China)
Xiaopeng Gong
Affiliation:
(GNSS Research Center, Wuhan University, Luoyu Road 129, Wuhan, Hubei 430079, China)
Shengfeng Gu
Affiliation:
(GNSS Research Center, Wuhan University, Luoyu Road 129, Wuhan, Hubei 430079, China)
Biyan Chen
Affiliation:
(Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Kowloon, Hong Kong)
*
(E-mail: [email protected])
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Abstract

The current positioning accuracy of the BeiDou Navigation Satellite System (BDS) Single Point Positioning (SPP) with code measurement is in the order of several metres due to systematic errors. To further reduce the systematic errors in SPP, this contribution develops a new strategy to BDS SPP with a sparse reference network, named Augmented SPP (A-SPP). In this method, the Combined Residual Errors (CRE) products of BDS B1I measurement are integrated with three optional base stations that are close to the rover station. Based on the Satellite Elevation Angle Weighted (SEAW) average technique, the code residual errors of each BDS satellite observed by the rover station can be acquired epoch-by-epoch. Finally, the corrected code observations for the rover station can be utilised to achieve an A-SPP solution. The validation of this method is confirmed by both static and kinematic tests. Results clearly show that the accuracies of the A-SPP solution for horizontal and vertical directions are better than 0·5 m and 1·0 m. This study suggests that the proposed A-SPP solution is a good option for single-frequency GNSS users to improve their positioning performance.

Keywords

Single point positioningBDSCombined residual errorsSparse reference network
Type
Research Article
Information
The Journal of Navigation , Volume 71 , Issue 2 , March 2018 , pp. 403 - 418
Copyright
Copyright © The Royal Institute of Navigation 2017 

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