中文摘要：

根据四川网络GPS站点附近的气压、温度计算了天顶静力学延迟量，经过综合分析，得到了最适于四川地区的天顶静力学延迟模型。建立了适于四川地区的加权平均温度计算公式，并说明了此公式的有效性。使用了全球气压和温度模型（GPT）代替实测气象数据进行水汽反演，将GPT可降水量与实测气象可降水量、探空数据可降水量以及实际降水量进行比较分析，得出了一些有益结论。

英文摘要：

The zenith hydrostatic delay was calculated, according to the pressure and temperature near the GPS sites of Sichuan network. The zenith hydrostatic delay model which is the best one in Sichuan was obtained with comprehensive analysis. The weighted average temperature calculation formula suitable for Sichuan was established, and its validity was analyzed. Global Pressure and Temperature model was used to make water vapor inversion instead of the meteorological data measured, and we obtained some conclusions through comparing global pressure and temperature model precipitable water with meteorological data measured precipitable water, radiosonde precipitable water and actual precipitation.