| Initial and comprehensive analysis of PPP time transfer based on Galileo high accuracy service | |
| Zhang, Runzhi1,2,6; Tu, Rui1,2,3,6; Lu, Xiaochun1,2,6; He, Zaimin4,5; Guang, Wei4,5; Xiao, Gongwei4,5 | |
| 2024-04-01 | |
| 发表期刊 | GPS SOLUTIONS
 |
| ISSN | 1080-5370 |
| 卷号 | 28期号:2页码:15 |
| 摘要 | European Galileo officially provided global users with the initial high accuracy service (HAS) through Galileo satellites for free on January 24, 2023. The emergence of the Galileo HAS provides the possibility of a globally stable real-time precise point positioning (PPP) time transfer that does not depend on a network. The coverage and service availability (the proportion of epochs that can support PPP solution) of the HAS, accuracy of the satellite orbit and clock offset, and accuracy of HAS time transfer were comprehensively analyzed using real-time and satellite-broadcast HAS data. Twenty-three global time links, including time-keeping laboratories, were established to assess the accuracy of time comparison using the HAS product. The results showed that the average numbers of GPS and Galileo satellites with valid HAS corrections worldwide were 9.44 and 7.95, respectively, and the average service availability of GPS-only and Galileo-only PPP using the HAS product reached 99.9% and 99.6%, respectively, in most areas. Taking post-processing satellite products from GeoForschungZentrum as a reference, the radial errors of the HAS orbit product are concentrated within 5 cm, and the accuracy of the corrected Galileo satellite clock offset was twice that of ephemeris. Further, in the 7200-12295 km-long baselines, the mean standard deviation values of HAS GPS-only, Galileo-only, and GPS/Galileo time comparison result errors were 0.19-0.29 ns, 0.13-0.24 ns, and 0.11-0.21 ns, respectively. In general, HAS time transfer is available globally. |
| 关键词 | Time transfer Precise point positioning Galileo initial high accuracy service GPS/Galileo |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center |
| DOI | 10.1007/s10291-024-01633-7 |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science & Technology Infrastructure of China ; National Science & Technology Infrastructure of China ; European GNSS Service Center ; European GNSS Service Center |
| WOS研究方向 | Remote Sensing |
| WOS类目 | Remote Sensing |
| WOS记录号 | WOS:001191299900002 |
| 出版者 | SPRINGER HEIDELBERG |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.72.145.45/handle/361003/14739 |
| 专题 | 导航与通信研究室 |
| 通讯作者 | Tu, Rui |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shandong Univ Sci & Technol, Coll Geodesy & Geomatics, Qingdao 266590, Peoples R China 4.Xian Univ Posts & Telecommun, Sch Commun & Informat Engn, Xian 710121, Peoples R China 5.Xian Univ Posts & Telecommun, Sch Artificial Intelligence, Xian 710121, Peoples R China 6.Chinese Acad Sci, Key Lab Precis Nav & Timing Technol, Xian 710600, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Runzhi,Tu, Rui,Lu, Xiaochun,et al. Initial and comprehensive analysis of PPP time transfer based on Galileo high accuracy service[J]. GPS SOLUTIONS,2024,28(2):15. |
| APA | Zhang, Runzhi,Tu, Rui,Lu, Xiaochun,He, Zaimin,Guang, Wei,&Xiao, Gongwei.(2024).Initial and comprehensive analysis of PPP time transfer based on Galileo high accuracy service.GPS SOLUTIONS,28(2),15. |
| MLA | Zhang, Runzhi,et al."Initial and comprehensive analysis of PPP time transfer based on Galileo high accuracy service".GPS SOLUTIONS 28.2(2024):15. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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