我国IGS站的周期变化特征  

THE PERIODIC VARIATION CHARACTERISTIC OF IGS STATIONS IN CHINA

作　　者：李洁园[1] 张国锋[1] 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《测绘信息与工程》2008年第5期10-12,共3页Journal of Geomatics

基　　金：国家"863计划"资助项目(2007AA12Z312)

摘　　要：利用谱方法和小波技术分析了我国IGS站坐标时间序列,阐述了其周期变化特征,即绝大部分台站在N、E、U方向都具有半年周期性、年周期性,U方向周期特性相对明显,同时台站的主要周期成分和时频局部特性又具有一定区域性。The time series of IGS stations in China are studied using spectrum analysis and wavelet analysis, and their periodic variation characteristics are shown. Most stations have semi- annual and annual period variations in north, east and elevation directions. The periodicity of elevation coordinates is more obvious. Meanwhile, the main period and the local property in time- frequency of the stations show certain regional nature.

关 键 词：我国IGS站 周期变化 谱分析 小波分析 

分 类 号：P228.4[天文地球—大地测量学与测量工程]