远地时钟比对数据消噪方法研究  

Research on a De-noise Method of the Remote Clock Comparative Data

作　　者：李变[1,2] 陈永奇[1,2] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,北京100049

出　　处：《宇航计测技术》2014年第1期33-36,共4页Journal of Astronautic Metrology and Measurement

基　　金：国家自然基金青年基金项目(11103025)

摘　　要：远地时钟比对是利用不同实验室的原子钟建立综合原子时尺度的必要条件,因而实现远地时钟比对的高精度时间传递技术的噪声水平,成为影响原子时性能的主要因素之一。本文主要研究了基于EMD的低通滤波方法,及其在远地时钟比对数据消噪中的应用,并将该方法与Vondrak平滑方法进行比较。结果表明:基于EMD的低通滤波结果明显优于Vondrak平滑结果。It is comparison among remote clocks that is a necessary condition of establishing joint a-tomic timescale using atomic clocks in different laboratories, so the noise level of high precision time transfer technology, which is used to compare among remote clocks, becomes one of the main factors in-fluencing the performance of atomic timescale. This paper mainly studied the low-pass filtering method based on empirical mode decomposition, and its application for de-noising of the remote clocks comparing data. And it is made to compare this method with Vondrak smoothing one. The results indicate that the low-pass filter results based on the empirical mode decomposition is better than Vondrak smooth ones.

关 键 词：时钟比对 经验模态分解 时空滤波器 

分 类 号：P127.1[天文地球—天体测量]