全球定位系统2024，Vol.49Issue(2)：23-29,7.DOI:10.12265/j.gnss.2023192
抗差Vondrak滤波方法在时间频率传递中的应用
Application of robust Vondrak filtering method in time-frequency transmission
张智超 1贾小林 2焦文海 3严祥高 1李佳豪1
作者信息
- 1. 长安大学地质工程与测绘学院,西安 710061
- 2. 智慧地球重点实验室,北京 100094
- 3. 北京跟踪与通信技术研究所,北京 100094
- 折叠
摘要
Abstract
The results of time-frequency transfer will be affected by the non-modeling error and observation noise,which is often high-frequency signals,and the construction of low-pass filter can eliminate the high-frequency noise signals in the observation sequence to a certain extent.In this paper,we analyze the nature of the Vondrak filter function,weight the clock difference sequence by the IGG3 algorithm and select the suitable filtering factor by the frequency response method;we conduct the satellite two-way time and frequency transfer experiment(TWSTFT),the satellite two-way time and frequency transfer experiment based on the software receiver(SDR-TWSTFT),and the short-baseline common-view time and frequency transfer experiment on the different links,and use the short-baseline common-sight time and frequency transfer method on the results.experiments,and the clock difference results are smoothed and denoised by anti-differential Vondrak filtering.The results show that:the filtered clock sequence can well reflect the trend of the original clock sequence;the daily fluctuation effect is effectively suppressed and the accuracy of the smoothed TWSTFT clock result is significantly improved;the accuracy of the common-view clock result is significantly improved,and the difference between the result and the precise point positiening(PPP)timing result is kept in the range of-1.0 to 1.0 ns.关键词
抗差Vondrak滤波/平滑因子/共视时间频率传递/卫星双向时间频率传递(TWSTFT)/精密单点定位(PPP)Key words
robust Vondrak filtering/smoothing factor/common-view time-frequency transfer/TWST-FT/PPP分类
天文与地球科学引用本文复制引用
张智超,贾小林,焦文海,严祥高,李佳豪..抗差Vondrak滤波方法在时间频率传递中的应用[J].全球定位系统,2024,49(2):23-29,7.
