GPS测站周年运动与温度变化的相关性研究

摘要

利用傅里叶快速变换（FFT）方法对ITRF2008部分全球分布的GPS测站坐标残差序列进行拟合分析，给出这项测站坐标残差的非线性变化模型。利用JPL（Jet Propulsion Laboratory）提供的GPS气象数据计算了温度变化引起的测站位移，并与残差拟合的主要周期进行相关性分析，发现季节性温度变化引起的热胀冷缩效应对测站非线性变化周年项有很大影响。%Some coordinate residuals of GPS stations globally distributed from ITRF2008 were analyzed by using FFT. There non-linear variation models were given, Based on the correlative analysis between our modeled main periods and the station displacement computed according to GPS weather data from JPL, it is obvious that the seasonal temperature change has great influence on the annual periods of non-linear variations of GPS station coordinates.