| GPS/BDS-3系统时差稳定性分析 |
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| 引用本文： | 刘明玥,涂锐,洪菊,苗亚格,李芳馨.GPS/BDS-3系统时差稳定性分析[J].全球定位系统,2022,47(4):55-63. |
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| 作者姓名： | 刘明玥 涂锐 洪菊 苗亚格 李芳馨 |
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| 作者单位： | 1.中国科学院国家授时中心, 西安 710600 |
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| 基金项目： | 国家自然科学基金项目(41674034，41974032) |
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| 摘 要： | 不同卫星导航系统之间时差的稳定性分析对时差的建模预报及应用具有重要价值， 因此基于由国际GNSS服务(IGS)中心提供的数据和产品从不同测站、不同观测量、不同时间长度三个方面对GPS和北斗三号全球卫星导航系统(BDS-3)的系统时差进行稳定性分析. 结果表明:不同测站因接收机、天线、时钟三种设备型号不同，提取的时差值存在差异，但稳定性相当；基于载波相位观测量解算的时差结果稳定性优于伪距观测量解算的时差结果，伪距得到的时差结果万秒频率稳定度在10?12~10?13量级，相位得到的时差结果万秒频率稳定度在10?14量级；通过单天与多天数据的时差解算结果比较，得到不同时长的时差稳定性一致.
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| 关 键 词： | GPS 北斗三号全球卫星导航系统(BDS-3) 时差监测 单站空间信号法 稳定性 |
| 收稿时间： | 2022-04-06 |
Stability analysis of GPS / BDS-3 system time offset |
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| Affiliation: | 1.National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China2.University of Chinese Academy of Sciences, Beijing 100049, China3.Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China |
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| Abstract: | The stability analysis of time offset between different satellite navigation systems is of great value in modeling prediction and application of time offset. Therefore, based on the data and products provided by the International GNSS Service Center (IGS), the stability analysis of system time offset between the GPS and BeiDou-3 Navigation Satellite System (BDS-3) from three aspects: different stations, different observations, and different time lengths. The results show: due to the different models of receivers, antennas and clocks, the time offset values extracted from different stations are different, but the stability is similar; The stability of the time offset result calculated based on the carrier phase observation is better than that of the pseudo range observation, the time offset result obtained by pseudo range has a frequency stability of the order of 10?12 to 10?13 in 10 000 seconds, and the time difference obtained by phase has a frequency stability of 10?14 seconds. By comparing the time offset calculation results of single-day and multi-day data, it is obtained that the time difference stability of different durations is consistent. |
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