ERA-Interim资料计算对流层天顶延迟方法及精度分析  

The method and accuracy analysis of calculating zenith tropospheric delay with ERA-Interim data

作　　者：张朝怡 覃凯 康佳佳 冉豪 刘彬彬 ZHANG Zhaoyi;QIN Kai;KANG Jiajia;RAN Hao;LIU Binbin(School of land Science And Technology, China University of Geosciences,Beijing 100089, China)

机构地区：[1]中国地质大学(北京)土地科学技术学院,北京100089

出　　处：《测绘工程》2021年第5期32-37,共6页Engineering of Surveying and Mapping

基　　金：大学生创新创业训练计划项目(201911415089)。

摘　　要：利用CDDIS提供的6个IGS站点2018年高精度对流层天顶延迟(ZTD)参考值,对利用ERA-Interim资料计算的ZTD值进行了精度评估。结果显示,ERA-Interim资料计算的ZTD与IGS提供的ZTD产品相比误差在cm级,不同纬度的计算ZTD及其偏差有不同的季节特征。IGS ZTD和ERA-Interim ZTD分别用于GNSS单点定位改正,伪距结果显示两者改正偏差的差异在亚毫米级,且结果在各个方向都得到了改善,U方向最明显,能达到0.5 m左右。Using the high-precision zenith tropopause delay(ZTD)reference values of six IGS stations provided by CDDIS in 2018,this paper calculates the accuracy of ZTD values by ERA-Interim data.The result shows that compared with the ZTD products provided by IGS,the calculated ZTD of ERA-Interim data is in centimeter scale,and the calculated ZTD with its deviation at different latitudes has different seasonal characteristics.IGS ZTD and ERA-Interim ZTD are respectively used for GNSS single point positioning correction.The pseudo range result shows that the difference between the two correction errors is in sub millimeter level,and the result is improved in all directions.The U direction is the most obvious,which can reach about 0.5 m.

关 键 词：ERA-Interim资料 对流层天顶延迟(ZTD) IGS 单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]