| GPS星载原子钟性能评估 |
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| 引用本文： | 贾小林,冯来平,毛悦,杨海彦.GPS星载原子钟性能评估[J].时间频率学报,2010,33(2). |
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| 作者姓名： | 贾小林 冯来平 毛悦 杨海彦 |
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| 作者单位： | 1. 西安测绘研究所,西安,710054
2. 中国科学院国家授时中心,西安,710600 |
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| 基金项目： | 中国科学院知识创新工程重要方向资助项目(KJUX2-YW-T12) |
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| 摘 要： | 介绍了星载原子钟性能评估指标——频率准确度、稳定度、漂移率的定义及计算方法,基于IGS(international GNSS service)卫星钟差数据,对GPS星载原子钟的性能指标进行了分析。其中,基于Hadamard方差方法的稳定度分析结果表明,GPS Block IIR星载铷原子钟天稳已经处于1～3×10-14的水平。
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| 关 键 词： | 准确度 漂移率 Hadamard方差 |
Performance Evaluation of GPS On-board Clock |
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| JIA Xiao-lin,FENG Lai-ping,MAO Yue,YANG Hai-yan.Performance Evaluation of GPS On-board Clock[J].Journal of Time and Frequency,2010,33(2). |
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| Authors: | JIA Xiao-lin FENG Lai-ping MAO Yue YANG Hai-yan |
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| Institution: | JIA Xiao-lin1,FENG Lai-ping1,MAO Yue1,YANG Hai-yan2(1.Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China,2.National Time Service Center,Chinese Academy of Sciences,Xi'an 710600,China) |
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| Abstract: | The definition and calculation methods for the frequency accuracy,stability and drift rate of GPS on-board clocks are introduced.The performance indices of GPS on-board clocks are analyzed based on the IGS(international GNSS service)precise clock data.The results based on the hadamard variance show that the stability(? =1 d) for the Rb clocks of GPS Block IIR satellites is about 1~3?10-14. |
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| Keywords: | accuracy drift rate Hadamard variance |
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