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| 卫星授时与时间传递技术进展 |
| 杨旭海,李孝辉,华宇,荆文芳,孙保琪,李伟超,钦伟瑾,武美芳,王伟,赵坤娟 |
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| (中国科学院国家授时中心，西安 710600;中国科学院大学天文与空间科学学院，北京 100049) |
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| 摘要: |
| 近年来，卫星导航技术发展迅速。卫星导航系统以精密时间测量技术为基础，实现了伪距测量，进而实现定位。同时,卫星导航系统还提供了高精度授时功能。综述了卫星导航系统的授时和时间频率传递技术、基于通信卫星的授时技术以及双向卫星时间频率传递（TWSTFT）技术等。随着我国北斗卫星导航系统（BDS）的建成和提供服务，BDS授时应用研究正在快速发展。基于BDS/GNSS多系统的精密单点定位（PPP）时间传递技术已成为重点研究方向，未来将会应用于国际时间比对。同时，随着卫星通信技术尤其是低轨通信卫星技术的快速发展，低轨通信卫星授时会成为一个有潜力的研究方向。 |
| 关键词: 北斗卫星导航系统 GPS 卫星通信 卫星授时 时间传递 |
| DOI： |
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| 基金项目:国家自然科学基金面上项目（12073034）；中国科学院“一带一路”团队项目（XAB2018YDYL01） |
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| Technical Progress of Satellite Time Service and Time Transfer |
| YANG Xu-hai,LI Xiao-hui,HUA Yu,JING Wen-fang,SUN Bao-qi,LI Wei-chao,QIN Wei-jin,WU Mei-fang,WANG Wei,ZHAO Kun-juan |
| (National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China) |
| Abstract: |
| In recent years, satellite navigation technology has developed rapidly. The satellite navigation system is based on precise time measurement technology, and on this basis, pseudo-range measurement is realized, and then positioning is realized. Meanwhile, the satellite navigation system also provides high-precision time service functions. This article summarizes the timing technology and time frequency transfer technology based on satellite navigation system. The timing technology and the Two-Way Satellite Time and Frequency Transfer(TWSTFT) technology based on communication satellites are reviewed.With the completion and services provision of the BeiDou Satellite Navigation System(BDS), the BDS timing applications are developing rapidly. The Precise Point Positioning(PPP) time transfer technology based on BDS/GNSS (Global Navigation Satellite System) multi-system becomes a key research direction and will be applied to interna-tional time comparison in the future. And with the rapid development of satellite communication technology, especially low-orbit communication satellites technology, low-orbit communication satellites timing may become a potential research direction. |
| Key words: BeiDou Satellite Navigation System (BDS) Global Positioning System (GPS) Satellite communication Satellite time service Time transfer |
