IGS跟踪站的大地高时间序列特征分析

摘要

应用国内几个IGS跟踪站在U方向的观测数据，分析研究跟踪站大地高的变化趋势。通过对时间序列进行奇异谱分析和傅立叶变换分析，表明大地高时间序列具有一定的周期性，且周期特性明显，时间序列的时频特性表现出明显的区域性。%Using observation data of Up direction of many IGS tracking station ,it analyzes the variational trend of the ellipsoidal height times series of station .From the Fourier transform and SSA (singular spectrum analysis ) analysis ,the ellipsoidal height times series represent annual and semiannual periods variations .