Analysis of the BDGIM Performance in BDS Single Point Positioning

被引:8
作者
Wang, Guangxing [1 ]
Yin, Zhihao [1 ]
Hu, Zhigang [2 ]
Chen, Gang [3 ]
Li, Wei [1 ]
Bo, Yadong [1 ]
机构
[1] China Univ Geosci, Sch Geog & Informat Engn, Wuhan 430078, Peoples R China
[2] Wuhan Univ, GNSS Res Ctr, Wuhan 430079, Peoples R China
[3] China Univ Geosci, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
BDS; BDGIM; Klobuchar; single point positioning (SPP); differential code bias (DCB); KLOBUCHAR MODEL;
D O I
10.3390/rs13193888
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The broadcast ionospheric model is mainly used to correct the ionospheric delay error for single-frequency users. Since the BeiDou global ionospheric delay correction model (BDGIM) is a novel broadcast ionospheric model for BDS-3, its performance was analyzed through single point positioning (SPP) in this study. Twenty-two stations simultaneously receiving B1C, B2a, B1I and B3I signals were selected from the International GNSS Service (IGS) and the International GNSS Monitoring and Assessment System (iGMAS) tracking networks for the SPP experiments. The differential code bias (DCB) parameters were used to correct the hardware delays in the signals of B1C and B2a. The results showed that the BDGIM performs the best in high-latitude areas, and can effectively improve the positioning accuracy compared with the Klobuchar model. The average 3D positioning accuracy of the four civil signals can reach 3.58 m in high-latitude areas. The positioning accuracies with the BDGIM in the northern hemisphere are better than those in the southern hemisphere, and the global average 3D positioning accuracy of the four civil signals is 4.60 m. The performance of the BDGIM also shows some seasonal differences. The BDGIM performs better than the Klobuchar model on the days of spring equinox and winter solstice, while the opposite is true on the days of summer solstice and autumn equinox. On the day of winter solstice, the average 3D accuracies with the BDGIM on the signals of B1C, B2a, B1I and B3I are 4.13 m, 5.32 m, 4.40 m and 4.49 m, respectively. Although the SPP accuracies are to some extent affected by the geomagnetic storm, the BDGIM generally performs better and are more resistant to the geomagnetic storm than the Klobuchar model.
引用
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页数:19
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