利用地基GPS反演可降水量，需要准确求得水汽转换参数。为了提高区域GPS大气水汽反演的精度，分析了大气加权平均温度的时空特性及其与地面温度之间的函数关系；利用江苏地区2003—2011年的气象探空数据建立了适用于江苏地区的局地大气加权平均温度计算模型。比较江苏模型、Bevis模型和李建国模型求得的大气加权平均温度值，江苏模型的精度较Bevis模型和李建国模型分别提高33.14％和9.28％。由江苏模型得到的可降水量内符合精度约为11.12 mm，较GAMIT软件结果精度提高约7.91％。%In order to get an acurate regional water vapor transformation parameter and improve the accuracy of re￣gional GPS atmospheric water vapor inversion a model was thus established which was applicable in Jiangsu area for the caculation of regional weighted average atmospheric temperature with 2003-2011 years of meteorological sounding data. it also looks into the spatiotemporal property of the regional weighted average atmospheric tempera￣ture in Jiangsu area as well as its function relation with ground temperature. Comapared with traditional Bevis model and Li Jianguo model the accuracy of Jiangsu model is respectively 33.14% and 9.28% higher than that of the previous ones. The Jiangsu model accuracy is about 11.12 mm. Comapared with GAMIT the accuracy is about 7.91% higher.
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