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Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias

文献类型：期刊论文

作者Zhang, Yize4,5; Wang, Hu2; Chen, Junping5; Wang, Ahao1; Meng, Lingdong1; Wang, Ershen3
刊名REMOTE SENSING
出版日期2020
卷号12期号:1页码:17
关键词BeiDou navigation satellite system broadcast ephemeris timing group delay differential code bias signal-in-space range error single point positioning
DOI10.3390/rs12010192
英文摘要The accuracy of the timing group delay (TGD) transmitted in the broadcast ephemeris is an important factor that affects the service performance of a GNSS system. In this contribution, an apparent bias is found by comparing the orbit and clock difference using half-year data of the BeiDou navigation satellite system (BDS) broadcast ephemeris and precise post-processed products. The bias differs at each satellite on each frequency and shows a general systematic difference between BDS-2 and BDS-3. We attribute this to the satellite-dependent TGD bias of the BDS broadcast ephemeris, which is subsequently calibrated. Moreover, to calibrate the bias independently, a network solution strategy is proposed based on 87 globally distributed multi-GNSS experiment (MGEX) stations spanning 25 weeks. The estimated bias shows good agreement with the values observed from the orbit and clock comparison. For the validation of the bias, we compared the signal-in-space range error (SISRE) performance with and without the TGD bias correction. The results show that the SISRE of the BDS improved from 0.71, 0.81, and 1.40 m to 0.64, 0.66, and 0.64 m in the B1I, B3I, and B1I/B3I frequencies. For BDS-3, the SISRE is well within 0.50 m after the bias correction. To further validate the bias, a week's data were collected at 97 globally distributed MGEX stations. When the TGD bias is corrected, the root mean square (RMS) of single point positioning (SPP) can be improved by 5.6, 8.4, and 21.6% in the B1I, B3I, and B1I/B3I frequencies. Meanwhile, the SISRE and SPP assessment results also indicate that the TGD bias should be corrected by each satellite rather than only corrected between BDS-2 and BDS-3.
WOS关键词ORBIT DETERMINATION ; MODEL
资助项目National Natural Science Foundation of China[41874042] ; National Natural Science Foundation of China[11673050] ; National Natural Science Foundation of China[61571309]
WOS研究方向Remote Sensing
语种英语
WOS记录号WOS:000515391700192
出版者MDPI
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.bao.ac.cn/handle/114a11/54562]  
专题中国科学院国家天文台
通讯作者Wang, Hu
作者单位1.Tongji Univ, Coll Surveying & Geoinformat, Shanghai 200092, Peoples R China
2.Chinese Acad Surveying & Mapping, Beijing 100830, Peoples R China
3.Shenyang Aerosp Univ, Sch Elect & Informat Engn, Shenyang 110136, Peoples R China
4.Tokyo Univ Marine Sci & Technol, Dept Maritime Syst Engn, Tokyo 1358533, Japan
5.Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yize,Wang, Hu,Chen, Junping,et al. Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias[J]. REMOTE SENSING,2020,12(1):17.
APA Zhang, Yize,Wang, Hu,Chen, Junping,Wang, Ahao,Meng, Lingdong,&Wang, Ershen.(2020).Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias.REMOTE SENSING,12(1),17.
MLA Zhang, Yize,et al."Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias".REMOTE SENSING 12.1(2020):17.

入库方式： OAI收割

来源：国家天文台

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