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用Kalman滤波实时监测卫星钟运行状况,需要确定Kalman滤波协方差阵。首先介绍适用于铷钟的Kalman滤波方程,推导基于哈达玛总方差的Kalman滤波过程噪声参数和观测噪声估计方法,并在此基础上构造Kalman滤波状态噪声协方差阵和观测噪声协方差阵。利用GPSBlockIIR铷钟事后处理的采样间隔为5min的精密钟差数据进行了预报分析,结果表明,当预报时间为1h时,预报精度在1ns左右;当预报时间为6h时,预报精度在(8～9)ns之间。进一步验证Kalman滤波协方差阵估计方法的正确性。 更多还原

【Abstract】 In order to manage the operational problems of satellite clocks using Kalman filter,its covariance matrixes need to be determined.A Kalman filter equation for Rubidium clocks was presented at first.A method for estimating the process noises and the observation noises of Kalman filter using total Hadamard variance was deduced.And then the prediction covariance represented by a function of the Kalman Filter process noises and the observation covariance was constructed.The precision of prediction w... 更多还原