基于MSSA的区域GPS站点季节性信号提取

基于MSSA同时提取多个GPS站点高程时间序列中的季节性信号，主要包括1 a项与0.5 a项。MSSA利用重建成分进行信号重构时，可从原始时间序列中提取有用信号，并剔除干扰噪声。将MSSA与SSA各自获取的前10个奇异谱方差所占百分比和重构信号进行对比，MSSA重构曲线中只包含多个站点的时变与具有共性的季节性信号，有效消除了单个站点特有的噪声与局部现象的影响。

Seasonal Signals Extraction of Regional GPS Stations Based on MSSA

In this paper, MSSA is used to simultaneously extract seasonal signals from multiple GPS stations’ elevation time series, mainly including annual and semi-annual items. The experiment verifies that MSSA can identify and extract seasonal signals in time series of GPS stations. At the same time, MSSA can use the reconstruction components(RC) to reconstruct the signals which can extract the useful signals from the original time series and remove interference noise. By comparing the percentages of the top 10 singular spectral variance and the reconstructed signals obtained from MSSA and SSA, it is shown that the MSSA reconstruction curve only contains the time-varying and common seasonal signals of multiple stations, effectively eliminating the influence of single site-specific noise and local phenomenon.