OUTLINE1.IntroductionofGRAPES-3DVarMainfeaturesofGRAPES_GAS??onlySondeRHobservationassimilationinGRAPESregional3DVAR20070601-0614NOAA16,AMSUA20070601-0614AgainstRadiosonde：humididyinformationofAMSUBhasaproperresponseinGRAPES-3DVARIndependentverification:RH[xa(amsub)]-Y(sonde)TuningofobservationerrorimproveGRAPES(30km)QPF3.Latestdevelopmentintheglobalassimilation/predictionexperiment：2008(XueshunSHENetal,2008)ATOVSmicrowave(NOAA151617)radiancesSondesgeop/humidity/windSynopsgeop/humidity/windShipsgeop/humidity/windAireptemp/windSatobwind500hPaACCagainstNCEP北半球，10天预报的500hPaACC检验(.vs.NCEPANA.)(2006120112－2007013112,62cases)南半球，10天预报的500hPaACC检验(.vs.NCEPANA.)(2006120112－2007013112,62cases)南半球预报检验，31cases(200612),againstNCEPANA.SummaryThanks!Suggestions?考虑了背景偏差的卫星资料观测偏差订正方案：“半偏订正”