| 利用σ_z(τ)方法对脉冲星时与原子时长期稳定度对比分析 |
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| 引用本文： | 张彩红,刘经南,聂桂根.利用σ_z(τ)方法对脉冲星时与原子时长期稳定度对比分析[J].武汉大学学报(信息科学版),2012,37(7):847-850. |
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| 作者姓名： | 张彩红 刘经南 聂桂根 |
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| 作者单位： | 1. 武汉大学测绘学院,武汉市珞喻路129号430079 武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079
2. 武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079 |
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| 基金项目： | 国家自然科学基金资助项目，中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 首次研究了毫秒脉冲星PSR J1939+2134共7.5a的双频计时残差序列的特征,通过分析不同行星星历对脉冲星计时精度的影响,建议使用DE421;采用σz(τ)方法估计了脉冲星时与原子时的稳定度,发现脉冲星时的稳定度一直处于上升趋势,6a高于10-15。由此可见,脉冲星时作为守时和授时的时间标准具有优势。
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| 关 键 词： | 脉冲星时 原子时 σz(τ)方法 长期稳定度 |
The Comparative Analysis of Long-term Stability of Pulsar Time and That of Atomic Time Using σZ （τ） |
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| ZHANG Caihong,LIU Jingnan,NIE Guigen.The Comparative Analysis of Long-term Stability of Pulsar Time and That of Atomic Time Using σZ （τ）[J].Geomatics and Information Science of Wuhan University,2012,37(7):847-850. |
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| Authors: | ZHANG Caihong LIU Jingnan NIE Guigen |
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| Institution: | 1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(2 Research Center of GNSS,Wuhan University,129 Luoyu Road,Wuhan 430079,China) |
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| Abstract: | The characters of 7.5 a timing series of dual-frequency timing for millisecond pulsar PSR J1939+2134 are studied for the first time.DE421 is suggested by analyzing the effects on the precision of pulsar timing with different planet ephemeris.The long-term stability of pulsar time and that of atomic time is evaluated using σz(τ) method,and it is found that the long-term stability of pulsar time is always improved with time elapsed and up to 10-15 in 6 a.Hence,pulsar time has obvious advantage as the time standard for keeping time and time service. |
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| Keywords: | pulsar time atomic time σz(τ) method long-term stability |
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