摘要
本文提出一种利用二阶差分对等间隔时间序列进行滤波的新方法,包括差分滤波器、保真差分滤波器和多级保真滤波等几种主要的方法.本文还以地极运动分量的分离为例,具体地应用了这一新的滤波方法,最后得到了1979—1990年间的Chandler项和周年项.
A new filtering method, including the differential filter, the high fidelity differential filter, and the multiplicate fidelity method of filtering, is introduced in the paper. As an exempie of application of the new method, the results of the separation of annual and Chandler wobbles in the case of polar motion from 1979 through 1990 are also given.
出处
《天文学报》
CSCD
北大核心
1992年第3期229-236,共8页
Acta Astronomica Sinica
关键词
差分
滤波器
地极移动
分量
等间隔
Time series with equal interval-second order differential-filtering
