地基GPS反演水汽影响因素分析

地基GPS(Global Position System)技术日益成熟,气象观测应用此技术逐渐增多,但对此影响因素的分析不是太多。本文首先阐述了地基GPS遥感水汽原理,然后结合雾灵山GPS气象观测试验数据,利用GAMIT软件解算此期间数据的对流层延迟量,主要分析了影响地基GPS遥感水汽的几项因素,得出测站精度与ZTD精度变化趋势图、星历精度与ZTD(Troposphere Zenith Delay)精度变化趋势图和不同参考站对ZTD的影响。其结果对GPS遥感大气水汽有一定的参考价值。

The analysis of several factors for the wound-based GPS remote sensing of water vapor

With the increasing maturity of the technology of the ground-based GPS,the applied technique of meteorological observation can be used more than before.However,the analysis of the factors is not enough.This paper explains the principle of remote sensing of water vapor by ground-based GPS.Based on the experimental data of meteorological observation from the Wuling Hill,it uses the software of GAMIT to find the troposphere delay of the data during that time.This paper mainly analyses several factors for the ground-based GPS remote sensing of water vapor and concludes the diagram of the precision trend between the measure station precision and the ZTD precision,the diagram of the precison trend between ephemerises precision and the ZTD and the effection from different reference stations to the ZTD.the result of which is of reference value for the research of remote sensing the atmospheric water vapor by ground-based GPS.