| Combining TWSTFT and GPS PPP using a Kalman filter | |
| Wang, Weixiong1,2,3; Dong, Shaowu1,2,3; Wu, Wenjun1,2,3; Guo, Dong1,2; Wang, Xiang1,2; Song, Huijie1,2 | |
| 2021-10-01 | |
| 发表期刊 | GPS SOLUTIONS
 |
| ISSN | 1080-5370 |
| 卷号 | 25期号:4页码:12 |
| 摘要 | Two-way satellite time and frequency transfer (TWSTFT) and GPS precise point positioning (GPS PPP) time transfer are two independent techniques for the generation of coordinated universal time. The advantages of TWSTFT are its high accuracy, characterized by calibration uncertainty, and long-term stability, but studies have shown that TWSTFT is disturbed by diurnal variations. Its short-term stability and high resolution characterize GPS PPP. However, GPS PPP solutions contain day boundary discontinuities that are reflected in their relatively lower long-term stability. Therefore, combining TWSTFT and GPS PPP based on their respective advantages effectively improves the robustness of accurate time transfer. We present a time transfer combination method based on the Kalman filter. As the average rate of TWSTFT results, the derivative of GPS PPP results together with TWSTFT data is used as observation measurements. A Kalman filter then obtains the final combined solution. Consequently, the diurnal variations that exist in TWSTFT practically disappear in the combined solution on different baselines, and the short-term stability of the combination is significantly improved. On different baselines, the time deviation (TDEV) of the combination solution at short averaging times (up to 32 h) is approximately 4-8 times lower than the solution using only data of TWSTFT. The TDEV of the Kalman filter combined solution is also better than the Vondrak-Cepek combined solution and GPS PPP solution for averaging times less than 4 h. This may be related to the Kalman filter being an optimal estimation method, which requires more observation information than the Vondrak-Cepek combined filter. |
| 关键词 | TWSTFT GPS PPP Time transfer Combination link Kalman filter |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences |
| DOI | 10.1007/s10291-021-01173-4 |
| 关键词[WOS] | TIME TRANSFER ; SATELLITE TIME ; RECEIVERS |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[11703030] ; Western Light Young Scholars Project of Chinese Academy of Sciences[XAB2017A06] |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Western Light Young Scholars Project of Chinese Academy of Sciences ; Western Light Young Scholars Project of Chinese Academy of Sciences |
| WOS研究方向 | Remote Sensing |
| WOS类目 | Remote Sensing |
| WOS记录号 | WOS:000688445000001 |
| 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/361003/10558 |
| 专题 | 量子频标研究室 时间频率基准实验室 |
| 通讯作者 | Dong, Shaowu |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Xian 710600, Peoples R China 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Weixiong,Dong, Shaowu,Wu, Wenjun,et al. Combining TWSTFT and GPS PPP using a Kalman filter[J]. GPS SOLUTIONS,2021,25(4):12. |
| APA | Wang, Weixiong,Dong, Shaowu,Wu, Wenjun,Guo, Dong,Wang, Xiang,&Song, Huijie.(2021).Combining TWSTFT and GPS PPP using a Kalman filter.GPS SOLUTIONS,25(4),12. |
| MLA | Wang, Weixiong,et al."Combining TWSTFT and GPS PPP using a Kalman filter".GPS SOLUTIONS 25.4(2021):12. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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