地基GPS遥感大气水汽含量的误差分析

讨论并分析了利用地基ＧＰＳ遥感大气水汽含量时的误差源及其数值评估。其误差来自三个方面：一是计算ＧＰＳ讯号传输时间中湿延迟的误差；二是将该湿延迟转换为大气水汽含量公式中测定转换因子的误差；三是转换模型的误差。

ON THE ERROR ANALYSIS FOR THE REMOTE SENSING OF ATMOSPHERIC WATER VAPOR BY GROUND BASED GPS

Error analysis and evaluation for the remote sensing of atmospheric water vapor by using ground based GPS are discussed and presented in the paper. There are three main error resources in the computation of atmospheric water vapor by using ground based GPS data. First is the error of computed wet delay. It is resulted from the computation of wet delay for the GPS signals transmission time. Second part is the error of the value of transformation factor ? ? The function of ? ?is to transform atmospheric water vapor value from the wet delay. The third one is the error of the model which is the connection between water vapor and wet delay.