中文摘要：

利用IGS站及实测气象参数的Saastamoinen模型来评估EGNOS天顶对流层延迟模型在新疆的精度，研究表明：（1）在新疆地区，EGNOS模型与IGS站数据符合较好，guao站BIAS为0.9mm，RMS为1cm；（2）EGNOS模型与实测气象参数的Saastamoinen模型比较分析后发现，两者之间平均BIAS为－7.9mm，RMS为1.62cm，BIAS随纬度的增加由负值变为正值，EGNOS模型精度在新疆地区随高程变化稳定，在高程较低处也能保证一定的精度，与其他同纬度不同高程的IGS站相比较，EGNOS模型精度在新疆地区优于其他地区；（3）与ECMWF资料计算的ZTD比较，EGNOS模型RMS优于ECMWF 近3.6cm。

英文摘要：

In this paper,EGNOS zenith tropospheric delay model is evaluated and analyzed by IGS date and Saastamoinen model with meteorological parameters.The results are that：（1 ） In the area of Xinjiang,EGNOS model is IGS date,in the site of guao,the BIAS is 0.9mm and the RMS is 1cm.（2）The average BIAS is-7.9mm and the RMS is 1.62cm when compared with Saastamoinen model using meteorological parameters. The BIAS changed from negative to positive with latitude increase.The accuracy of EGNOS model is stable with the change of elevation and can guarantee high accuracy in low place. （3 ） When compared with ECMWF date,the RMS of EGNOS is better than ECMWF about 3.6cm.