利用OKF方法监测UT1周日变化

USING OKF METHOD TO MONITOR UT1 DAILY VARIATION

为了有效地利用甚长基线干涉测量（ＶＬＢＩ）技术监测世界时（ＵＴ１）的周日变化，本文引入了单参数分段卡尔曼滤段（ＯＫＦ）法。利用这一方法能从２４小时ＶＬＢＩ观测资料中可靠地分离出分辨率为１小时的ＵＴ１变化量，从而为研究地球自转高频变化作出贡献。

In order to monitor the daily variation in Universal time(UT1) by Very Long Baseline Interferomety(VLBI) tichnique effectively,the method of one parameter break Kalman Filtering (OKF) was developed in the paper.This method can separate the UTI’s variation from 24-hourVLBI experiment data reliably with a temporal resolution to 1 hour,so it will be contributed to the research of high-frequency variations in earth orientation.