电子测量与仪器学报

李丹丹,许龙霞,李博,李孝辉.空间信号误差对北斗单向授时的影响[J].电子测量与仪器学报,2017,31(10):1673-1678

空间信号误差对北斗单向授时的影响

Impact of signal in space error on Beidou one way timing

DOI：10.13382/j.jemi.2017.10.022

英文关键词:Beidou navigation satellite system signal in space error ephemeri error satellite clock error one way timing

基金项目:国家自然科学基金（11503030）、国防创新基金面上项目（CXJJ 16M205）资助

作者	单位
李丹丹	1. 中国科学院国家授时中心西安710600；2. 中国科学院精密导航定位与定时技术重点实验室西安710600；3. 中国科学院大学北京10049
许龙霞	1. 中国科学院国家授时中心西安710600；2. 中国科学院精密导航定位与定时技术重点实验室西安710600
李博	1. 中国科学院国家授时中心西安710600；2. 中国科学院精密导航定位与定时技术重点实验室西安710600；3. 中国科学院大学北京10049
李孝辉	1. 中国科学院国家授时中心西安710600；2. 中国科学院精密导航定位与定时技术重点实验室西安710600

Author	Institution
Li Dandan	1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; 2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China;3. University of Chinese Academy of Sciences, Beijing 100049, China
Xu Longxia	1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; 2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
Li Bo	1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; 2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China;3. University of Chinese Academy of Sciences, Beijing 100049, China
Li Xiaohui	1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; 2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China

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中文摘要:

北斗卫星广播星历是影响授时服务的主要误差源，分析它的精度是非常必要的。分析了空间信号误差的主要组成星历误差和星钟误差的计算方法，并阐述了计算过程中应注意的问题：参考时间尺度不一致、坐标系不一致和卫星位置参考点不一致。以IGS分析中心GFZ提供的事后精密星历为参考，利用北斗卫星广播星历分析了空间信号误差对北斗单向授时的影响。结果表明，空间信号误差对北斗单向授时的影响随机波动在7 ns以内，由于不同北斗卫星对应的星钟误差中存在大小不等的系统误差，导致星钟误差对单向授时结果的影响大于星历误差。

英文摘要:

Beidou satellite broadcast ephemeris is the main error source of timing service, and it is necessary to analyze its precision. The calculation method of signal in space is analyzed mainly considering satellite ephemeris and satellite clock error. The care must be taken is that when using the BeiDou satellite broadcast ephemeris and precise ephemeris/clocks the reference time scale is atypsim, the coordinate system is atypsim, and the reference point of satellite position is atypsim. The impact of signal in space error on one way timing is analyzed with IGS final precise ephemeris for reference. According to the results, the random fluctuation of the impact of signal in space error on one way timing is within 7 ns. And the impact of satellite clock error is relatively larger than that of satellite ephemeris error because there are different system errors corresponding to each BeiDou satellite’s clock error.

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