毛亚, 王潜心, 胡超, 杨鸿毅, 张铭彬. BDS-3卫星钟差特性分析[J]. 武汉大学学报 ( 信息科学版), 2020, 45(1): 53-61. DOI: 10.13203/j.whugis20180224
引用本文: 毛亚, 王潜心, 胡超, 杨鸿毅, 张铭彬. BDS-3卫星钟差特性分析[J]. 武汉大学学报 ( 信息科学版), 2020, 45(1): 53-61. DOI: 10.13203/j.whugis20180224
MAO Ya, WANG Qianxin, HU Chao, YANG Hongyi, ZHANG Mingbin. Analysis of the Characterization for BDS-3 Satellite Clock Error[J]. Geomatics and Information Science of Wuhan University, 2020, 45(1): 53-61. DOI: 10.13203/j.whugis20180224
Citation: MAO Ya, WANG Qianxin, HU Chao, YANG Hongyi, ZHANG Mingbin. Analysis of the Characterization for BDS-3 Satellite Clock Error[J]. Geomatics and Information Science of Wuhan University, 2020, 45(1): 53-61. DOI: 10.13203/j.whugis20180224

BDS-3卫星钟差特性分析

Analysis of the Characterization for BDS-3 Satellite Clock Error

  • 摘要: 北斗全球导航卫星系统(简称北斗三号系统,BDS-3)载有高精度的国产新型铷钟和被动型氢原子钟,相比于北斗二号系统(BDS-2),其性能得到了极大的提升。为了分析BDS-3卫星钟的性能,首先采用中国矿业大学北斗数据处理与分析中心定轨软件估计了BDS-3的卫星钟差,其重叠弧段标准差精度优于1 ns。然后针对常用卫星钟差异常值探测方法的缺点,改进了Baarda粗差探测法,使其能够有效地处理北斗卫星钟差数据中存在的粗差、钟跳等异常值。最后采用处理后的钟差数据,分析了北斗卫星钟差的周期特性和频率稳定性。结果表明,加入两个周期项后,拟合残差序列更加稳定,拟合精度得到了很大的提升;BDS-3卫星的频率稳定性和BDS-2相比,提升了20.85%~75.09%;北斗中圆地球轨道(medium earth orbit,MEO)卫星的频率稳定性要优于倾斜地球同步轨道(inclined geosynchronous orbit,IGSO)卫星;氢原子钟频率稳定性高于铷原子钟40.16%~65.60%,且氢原子钟的长期稳定性要明显优于铷原子钟。

     

    Abstract: BeiDou global navigation satellite system (BDS-3) satellites are equipped with high-precision domestic new rubidium clocks and passive hydrogen atomic clocks. Compared with the satellites of BeiDou-2 system (BDS-2), the performance of BDS-3 has great promotion. In order to analyze the performance of the BDS-3 satellite clock, firstly the satellite clock errors of BDS-3 were estimated using the orbit determination software from BeiDou Data Processing and Analysis Center, China University of Mining and Technology, and the standard deviation accuracy of the overlapping arc segments is better than 1 ns. Then, based on the shortcomings of the commonly used satellite clock error outlier detection method, the Baarda gross error detection method was improved so that it can effectively handle the outliers with gross errors and clock slips in the clock errors data. Finally, the processed clock errors data were used to analyze the period characteristics and frequency stability. Analysis results show that the fitting residuals are more stable and the fitting accuracy has been greatly improved after adding two periodic terms. Compared with BDS-2 satellites, the frequency stability of BDS-3 satellites has increased by 20.85%-75.09%. The frequency stability of medium earth orbit (MEO) satellites of BeiDou navigation satellite system is better than that of inclined geosynchronous orbit (IGSO) satellites. The frequency stability of the hydrogen atomic clock is higher than that of the europium atomic clock up to 40.16%-65.60%, and the long-term stability of the hydrogen atomic clock is significantly better than that of the europium atomic clock.

     

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