第52卷第1期测绘学报Vol.52,No.12023年1月ActaGeodaeticaetCartographicaSinicaJanuary,2023引文格式:周要宗,楼益栋,张卫星,等.基于CRA40产品的对流层延迟计算及对比分析[J].测绘学报,2023,52(1):22-31.DOI:10.11947/j.AGCS.2023.20210370.ZHOUYaozong,LOUYidong,ZHANGWeixing,etal.OnthecalculationandcomparativeanalysisoftroposphericdelayfromCRA40product[J].ActaGeodaeticaetCartographicaSinica,2023,52(1):22-31.DOI:10.11947/j.AGCS.2023.20210370.基于CRA40产品的对流层延迟计算及对比分析周要宗1,楼益栋1,张卫星1,梁宏2,施闯3,吴迪4,曹云昌21.武汉大学卫星导航定位技术研究中心,湖北武汉430079;2.中国气象局气象探测中心,北京100081;3.北京航空航天大学卫星导航与移动通信融合技术工业和信息化部重点实验室,北京100191;4.南宁师范大学地理与海洋研究院,广西南宁530001OnthecalculationandcomparativeanalysisoftroposphericdelayfromCRA40productZHOUYaozong1,LOUYidong1,ZHANGWeixing1,LIANGHong2,SHIChuang3,WUDi4,CAOYunchang21.GNSSResearchCenter,WuhanUniversity,Wuhan430079,China;2.MeteorologicalObservationCentreofCMA,Beijing100081,China;3.LaboratoryofNavigationandCommunicationFusionTechnology,MinistryofIndustryandInformationTechnology,BeihangUniversity,Beijing100191,China;4.InstituteofGeographyandOceanography,NanningNormalUniversity,Nanning530001,ChinaAbstract:AsthereleaseofChina̓sfirstgeneration40a(1979—2018)globalatmosphereandlandreanalysis(CRA40)byChinameteorologicaladministration(CMA)inDecember2020,thesuitability,methodandperformanceofCRA40introposphericdelayray-tracingisinitiallyinvestigatedinthispaper.Troposphericdelaysinzenithand5°elevationdirectionsat231internationalGNSSservice(IGS)and213crustalmovementobservationnetworkofChina(CMONOC)stationsduringtheyearof2018fromCRA40andtwoECMWFreanalysis(ERA-InterimandERA5)areray-tracedandevaluatedbyGNSSzenithtotaldelay(ZTD)productsandinter-comparisoninglobeandChinaarea,respectively.ThechangelawfromtheCRA40zenithwetdelay(ZWD)andslantwetdelay(SWD)accuracyisalsoanalyzedoverChina.TheresultsshowthattheCRA40ZTDdifferenceRMSisabout1.40cm,anditisslightlybetterthanERA-Interiminglobean...
