| 利用Vondrak平滑处理PPP时间传递的随机噪声 |
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| 引用本文： | 雷雨,赵丹宁.利用Vondrak平滑处理PPP时间传递的随机噪声[J].测绘工程,2013(6):18-21. |
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| 作者姓名： | 雷雨 赵丹宁 |
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| 作者单位： | [1]中国科学院国家授时中心,陕西西安710600 [2]中国科学院时间频率基准重点实验室,陕西西安710600 [3]中国科学院研究生院,北京100039 [4]中国科学院精密导航定位与定时技术重点实验室,陕西西安710600 |
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| 基金项目： | 国家自然科学基金资助项目（11103025） |
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| 摘 要： | 利用精密单点定位（Precise Point Positioning,PPP）获得的时间传递结果受到非模型化误差和观测噪声的影响,这些误差和噪声表现出随机噪声特性,因此,对时间传递数据进行平滑是一项非常重要的任务.将天文数据处理中广泛应用的Vondrak平滑方法应用于PPP时间传递的消噪中,采用观测误差法选取较为合理的平滑因子,并对实测数据进行平滑处理,结果表明：Vondrak平滑法可有效地滤除PPP数据的随机噪声,不仅可以提高时间传递的精确度,也能明显改善PPP时间传递所体现的频率稳定度.
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| 关 键 词： | Vondrak平滑 精密单点定位 时间传递 随机噪声 |
Filtering random noise from PPP time transfer based on Vondrak |
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| LEI Yu,ZHAO Dan-ning.Filtering random noise from PPP time transfer based on Vondrak[J].Engineering of Surveying and Mapping,2013(6):18-21. |
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| Authors: | LEI Yu ZHAO Dan-ning |
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| Institution: | (National Time Service Centre, Chinese Academy of Sciences, Xi＇an 710600, China;Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China;Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences , Xi＇an 710600, China) |
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| Abstract: | Unmodeled errors and measurement noise,characterized by random noise,affect the performance of PPP（Precise Point Positioning） for time transfer.Therefore,filtering random noise is a key task.Random noise is filtered by Vondrak filter widely applied to astronomy data processing.Moreover,a measurement error method is applied to estimating filter factor.Finally,experiments are carried on to validate the effect of Vondrak filter.Result shows that Vondrak filter can filter random noise from PPP time transfer,and can improve not only the precision but the stability. |
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| Keywords: | Vondrak filter precise point positioning time transfer random noise |
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