An investigation of PPP time transfer via BDS-3 PPP-B2b service

被引：43
作者：
Ge, Yulong [1 ]
Cao, Xinyun [2 ]
Lyu, Daqian [3 ]
He, Zaimin [4 ]
Ye, Fei [5 ]
Xiao, Gongwei [4 ]
Shen, Fei [2 ]
机构：
[1] Nanjing Normal Univ, Sch Marine Sci & Engn, Nanjing 210023, Peoples R China
[2] Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China
[3] Natl Univ Def Technol, Coll Elect Engn, Hefei 230037, Peoples R China
[4] Xian Univ Posts & Telecommun, Sch Commun & Informat Engn, Xian 710121, Peoples R China
[5] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China
来源：
GPS SOLUTIONS | 2023年 / 27卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Time transfer; BDS-3; GPS; Real-time PPP; PPP-B2b; ORBIT DETERMINATION; SATELLITES; MGEX;
D O I：
10.1007/s10291-023-01402-y
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
Since 2020, China's Beidou has begun to provide an initial real-time precise point positioning (PPP) service via B2b signals for the Asia-Pacific region. It is expected to be used to achieve centimeter-level positioning and also brings opportunities for real-time time transfer. We collected 29 days of experimental data and compared it with the Centre National d'Etudes Spatiales (CNES) real-time products. The quality of the satellite's orbit and clock was analyzed first. Then, time transfer based on BDS-3, GPS, and BDS-3/GPS PPP was investigated. The results showed that the GPS PPP with the PPP-B2b is not recommended. The time transfer based on BDS-3 PPP using the PPP-B2a is feasible and achieves a 0.30 ns level. Importantly, the reliability of time transfer using the PPP-B2b outperforms that of PPP using CNES products due to the problem of unstable internet communication. Furthermore, compared to BDS-3-only, the precision of time transfer based on BDS-3/GPS PPP was not improved significantly.
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页数：17
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