估计北斗卫星钟差频间偏差的一种方法

发布时间：2018-04-06 01:30

本文选题：三频信号　切入点：精密单点定位　出处：《测绘学报》2016年02期

【摘要】：针对北斗频间卫星钟差偏差现有估计方法的不足,提出一种估计方法。该方法不仅顾及频间卫星钟差偏差的变化部分也顾及了其常数部分。采用10个观测站数据,验证了本文提出的算法,分析了北斗频间卫星钟差偏差的特性。在短期内,北斗频间卫星钟差偏差常数部分具有稳定性。对采用新算法计算得到的北斗频间卫星钟差偏差进行了模型化,结果表明,每颗卫星对应的频间钟差偏差可以利用10个参数予以高精度表示,对应精度可以达到厘米级。当采用第1天的模型参数进行第2天频间卫星钟差偏差值计算时,可实现厘米级结果。基于北斗频间卫星钟差偏差的稳定性与可模型化性,提出了高精度北斗卫星钟差服务策略,为我国高精度北斗卫星钟差服务提供参考。
[Abstract]:Aiming at the shortcomings of the existing estimation methods of satellite clock deviation between Beidou frequency, a new estimation method is proposed.This method takes into account not only the variation of satellite clock error but also its constant part.The proposed algorithm is verified by the data of 10 observational stations, and the characteristics of the satellite clock error between the Beidou frequency and the frequency are analyzed.In the short term, the satellite clock error constant of Beidou frequency is partially stable.The clock error of Beidou frequency satellite calculated by the new algorithm is modeled. The results show that each satellite's inter-frequency clock deviation can be expressed with high precision by 10 parameters, and the corresponding precision can reach the centimeter level.When the model parameters of the first day are used to calculate the satellite clock deviation between frequencies on the second day, the centimeter level results can be realized.Based on the stability and modelability of the satellite clock deviation between the Beidou frequency, a high-precision Beidou satellite clock difference service strategy is proposed, which provides a reference for the high-precision Beidou satellite clock difference service in China.
【作者单位】：同济大学测绘与地理信息学院;地理信息工程国家重点实验室;西安测绘研究所;
【基金】：国家自然科学基金(41204034;41174023;41374031) 上海市科委项目(14511105000)~~
【分类号】：P228.4

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