The paper have built the local correction models for dry delay and atmospheric weighted temperature and have made a comparison between two models for calculating actual water vapor on the basis of actual upper - air detecting data . ah results show that the conclusion is satisfied 本研究利用实际探空资料建立了大气干延迟和大气加权平均温度的局地订正模型，并对实际水汽计算模型进行了比较，得到了满意的结果。
2.
( 2 ) model correction and comparison in the process of conversion from zenith day delay to gps water vapor and precision evaluation . saastamoinen ( sa ) model and hopfield ( h ) for dry delay and bevis model for atmospheric weighted temperature are adopted ( 2 )模型订正与比较在gps水汽反演过程中，一般干延迟和大气加权平均温度的计算是采用“普适性”模型，目前应用较多的有saastamoinen ( sa )模型、 hopfield ( h )模型和bevis模型。
