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The update of BDS-2 TGD and its impact on positioning
Zhang, Yize1,2; Chen, Junping1; Gong, Xiuqiang1; Chen, Qian1
2020-06-01
Source PublicationADVANCES IN SPACE RESEARCH
ISSN0273-1177
Volume65Issue:11Pages:2645-2661
AbstractTiming group delay (TGD) is an important parameter that affects the positioning performance of global navigation satellite systems (GNSS). The BeiDou navigation satellite system (BDS) broadcasts TGD corrections from B3I frequency to B1I and B2I frequencies, namely TGD(1) and TGD(2). On July 21, 2017, BDS updated TGD values with a maximum change of more than 4 ns. In this contribution, we explain the motivation for the BDS TGD update, which is due to the systematic bias between narrowly correlated and widely correlated pseudo-ranges in BDS monitoring receivers. To investigate the impact of the updated TGD, BDS signal-in-space range error (SISRE) and user positioning performance regarding single point positioning (SPP) and precise point positioning (PPP) are analyzed. Results show that after the update of TGD, the difference between the new TGD and multi-GNSS experiment (MGEX) differential code bias (DCB) decreases from 1.38 ns to 0.29 ns on TGD(1) and from 0.40 ns to 0.25 ns on TGD(2). With the contribution of more accurate TGD, the systematic bias of BDS radial SISRE no longer exists, and the overall BDS SISRE also reduces from 1.33 m to 0.87 m on B1I/B2I frequency, from 1.05 m to 0.89 m on B1I frequency, from 0.92 m to 0.91 m on B2I frequency, respectively, which proves the similar precision of BDS TGD and MGEX DCB. One week of statistical results from 28 globally distributed MGEX stations shows that the SPP performance improves on non-B3I frequencies after the TGD update, with a maximum improvement of more than 22% for the B1I/B2I or B1I/B3I combination. The new TGD mainly reduces SPP positioning bias in the East component. The updated TGD also slightly improves the PPP convergence performance for the B1I/B3I combination, but mostly contributes to a more accurate estimation of the receiver clock and ambiguities. (C) 2020 COSPAR. Published by Elsevier Ltd. All rights reserved.
KeywordTiming group delay Differential code bias Signal-in-space range error Single point positioning Precise point positioning
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province
DOI10.1016/j.asr.2020.03.011
WOS KeywordDIFFERENTIAL CODE BIAS ; PERFORMANCE EVALUATION ; NAVIGATION ; MODEL ; SATELLITES ; GPS
Language英语
Funding ProjectNational Natural Science Foundation of China[11673050] ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone[ZJ2018-ZD-009] ; National Key R&D Program of China[2018YFB0504300] ; Key R&D Program of Guangdong province[2018B030325001]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; Key Program of Special Development funds of Zhangjiang National Innovation Demonstration Zone ; National Key R&D Program of China ; National Key R&D Program of China ; Key R&D Program of Guangdong province ; Key R&D Program of Guangdong province
WOS Research AreaEngineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS SubjectEngineering, Aerospace ; Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS IDWOS:000533505800016
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54954
Collection中国科学院国家天文台
Corresponding AuthorChen, Junping
Affiliation1.Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Tokyo Univ Marine Sci & Technol, Tokyo 1358533, Japan
Recommended Citation
GB/T 7714
Zhang, Yize,Chen, Junping,Gong, Xiuqiang,et al. The update of BDS-2 TGD and its impact on positioning[J]. ADVANCES IN SPACE RESEARCH,2020,65(11):2645-2661.
APA Zhang, Yize,Chen, Junping,Gong, Xiuqiang,&Chen, Qian.(2020).The update of BDS-2 TGD and its impact on positioning.ADVANCES IN SPACE RESEARCH,65(11),2645-2661.
MLA Zhang, Yize,et al."The update of BDS-2 TGD and its impact on positioning".ADVANCES IN SPACE RESEARCH 65.11(2020):2645-2661.
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