The content of this article comes from the "Surveying and Mapping Bulletin" No. 8, 2024, drawing review number: GS Jing (2024) No. 1527
BDS-3 B1C/B2a长基线相对定位研究
方卓1, 王立诗云2, MICHAEL Floyd3
1. Nanjing Digital Dimension Surveying and Mapping Co., Ltd., Nanjing, Jiangsu, 211808; 2. Nanning Survey and Design Institute Co., Ltd., China Railway Fourth Institute Group, Nanning 430007, Guangxi, China; 3. Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139
Funds: National Natural Science Foundation of China (42271106; 42071221)
Key words: Beidou-3 satellite navigation system, frequency signal, data quality, relative positioning
引文格式：方卓, 王立诗云, MICHAEL Floyd. BDS-3 B1C/B2a长基线相对定位研究[J]. 测绘通报, 2024(8): 31-36,53.doi: 10.13474/j.cnki.11-2246.2024.0806.摘要
Abstract:In order to verify the relative positioning accuracy of the B1C/B2a long baseline of the Beidou-3 Satellite Navigation System (BDS-3), this paper first analyzes the quality of the observation data of 8 MGEX stations in Australia for 10 consecutive days in DOY (304~313) in 2023. Then, the improved GAMIT10.76 software was used to calculate the relative positioning of the long baseline of the observation data. Finally, the data quality of BDS-3 and GPS signal combinations at different frequencies and the baseline solution of dual-frequency ionosphere-free linear combination, as well as the accuracy of the network adjustment were evaluated. The experimental results show that the data quality, carrier-to-noise ratio and pseudorange multipath error of the combined signals of B1C/B2a, B1C/B2b and B1C/B3I frequency points are basically the same, which is better than that of L1/L2. The standardized root mean square (NRMS) of B1C/B2a was slightly better than that of B1C/B2b and L1/L2, and significantly better than that of B1C/B3I. The ambiguity fixation rates of B1C/B2a and B1C/B2b are basically the same, which is significantly better than that of B1C/B3I and worse than that of L1/L2. The experimental results further show that the mean standard deviation (STD) and the mean three-dimensional point error of the baseline components east (E), north (N) and zenith (U) of B1C/B2a relative to B1C/B3I are reduced by 29.4%, 27.0%, 30.0% and 41.0%, respectively.
About author:FANG Zhuo (1996—), male, research intern, research direction is satellite navigation and positioning technology and methods. E-mail:[email protected] Corresponding author: Wang Lishiyun. E-mail:[email protected]
First instance: Yang Ruifang review: Song Qifan
Final Judge: Jin Jun
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