【摘要】 针对不同区域的周期和噪声特性存在差异,以27个山东连续运行参考站(CORS)2015—2018年的坐标时间序列为研究对象,进行周期和噪声特征分析.结果表明:坐标时间序列并没有严格的周期信号,U方向的周期运动较为规律;坐标分量的谱指数显示大部分站点可用白噪声(WN)+闪烁噪声(FN)的噪声模型进行描述;采用最大似然估计法(MLE)确定山东CORS站坐标时间序列N方向的最佳噪声模型为WN+FN,E、U方向的最佳噪声模型为WN+FN+随机漫步噪声(RWN).更多还原

【Abstract】 In view of the difference of period and noise characteristics in different regions, this paper takes the coordinate time series of 27 CORS in Shandong Province from 2015 to 2018 as the research object,and analyzed the period and noise of coordinate components of each station on the basis of data preprocessing. The results show that, there is no strict whole periodic signal in coordinate time series, and the periodic motion in U direction is relatively regular. The spectrum index of coordinate component shows that the noise model of most stations is white noise(WN) + flicker noise(FN). Using the maximum likelihood estimation criterion, the best noise model of coordinate time series in Shandong CORS station is WN + FN,and the best noise model in E and U direction is WN + FN. The best noise model is WN + FN + random walk noise(RWN).更多还原