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2001200451200452004524681.181.281.3101.3.1101.3.2121.3.3171.4181.4.1181.4.2191.4.3191.521222.1222.1.16S222.1.2222.1.3242.1.4252.21COCTSCCD282.2.1282.2.2292.2.3302.2.4312.2.5312.347483.1SZ3-CMODISEOS-MODIS483.1.1SZ3-CMODISEOS-MODIS483.1.2493.1.3533.1.4553.2EOS/MODISFY1D/VIRR563.2.1563.2.2573.2.3653.2.4686934.1694.2HY-1/COCTS704.2.1704.2.2714.2.3734.2.4754.2.5784.2.6804.3NCEPHY-1/COCTS814.3.1814.3.2NCEP834.3.3NCEPHY-1/COCTS834.3.490FY-2B915.1FY-2B915.1.1915.1.2925.1.3925.1.4945.1.5945.1.6955.2975.2.1975.2.2T975.2.3T985.3FY-2B1005.3.11005.3.21005.3.31025.4FY-2B1035.4.1FY-2B1035.4.2NCEP1055.4.3MODTRAN3.71055.4.41095.4.51105.4.61115.4.71125.4.81161171191234HY-1/COCTSHY-1/CCDFY-1D/VIRRSZ-3/CMODISHY-1/COCTSFY-2B1HY-1/COCTSCCD20027162023HY-1/COCTSHY-1/CCD57BRDF412nm443nm2EOS/MODISFY1D/VIRRSZ3/CMODISEOS/MODISFY1D/VIRRSZ3/CMODISEOS/MODISFY1D/VIRRSZ3/CMODISFY1D/VIRRSZ3/CMODISFY1D/VIRRSZ3/CMODISFY1D/VIRRSZ3/CMODIS3HY-1/COCTS20038HY-1/COCTS5NCEPHY-1/COCTSNCEP4FY-2BFY-2BFY-2BNCEPFY-2BFY-2BFY-2BT-TFY-2B:NCEP6TheStudyonSynthesisRadiometricCalibrationMethodsforSatelliteSensorsAbstractIt’snecessarytocalibratethesatellitesensorsforquantitativeapplicationofremotedataandcheckingthecharacterchangesofsensors.Therearemanymethodsforradiometriccalibrationsuchaspre-launchcalibration,onboardcalibration,in-flightcalibrationandcrosscalibration.Allthemethodsareindependenteachotherandhavetheirownadvantages.Inthisdissertation,thevisibleandnearinfraredbandsofHY-1/COCTS,HY-1/CCD,FY-1D/VIRR,SZ-3/CMODISandthermalinfraredbandsofHY-1/COCTS,FY-2Barecalibratedbyadoptedvariousmethods.Thedetailsareasfollows:1:In-flightcalibrationforvisibleandnearinfraredbandsofHY-1/COCTS,CCDbyusingreflectance-basedmethodIt’sthefirsttimetocalibratethevisibleandnearinfraredbandsofHY-1/COCTS,CCDbyusingthereflectance-basedmethodafterthefieldexperimentsinDunhuangon16th20th23rdJuly2002.Thecalibrationresultsshowthatchangerangeofthecalibrationcoefficientsislessthan5%andtheuncertaintyexcels7%.ThesurfacereflectanceneedstobecorrectedduetotheBRDFiftheviewzenithofsatelliteisbig.Comparingthecalibrationcoefficientsofthistimewiththoseofpre-launch,theobviousdeviationisfoundinbands412nmand443nmandtheresultsoftheleftbandsareconsistent.Thedeviationcanbecorrectedbyusingthecalibrationresultsofthetime.2:Cross-calibrationforvisibleandnearinfraredbandsofFY1D/VIRRandSZ3/CMODISbasedontheEOS/MODISThecrosscalibrationmethodareadoptedtocalibratethevisibleandnearinfraredbandsofFY1D/VIRRandSZ3/CMODISbasedontheEOS/MODIS.Thematchfactorsareworkedoutafterthematchbandsofdifferentsensors.WhenthesensorsviewtheDunhuangradiometriccalibrationsiteatthesametime,theapparentradianceandreflectanceofFY1D/VIRRandSZ3/CMODISarecalculatedbasedonthedigitalnumberofEOS/MODIS.ThecalibrationcoefficientscanbeobtainedbycomparingtheapparentradianceandreflectanceofFY1D/VIRRandSZ3/CMODISwiththecorrespondingdigitalnumbers.It’s7foundthattheyareveryconsistentaftercomparingthecoefficientsofcrosscalibrationwiththoseofin-flightcalibration.Theresultscancorrectthedeviationofcoefficientsofpre-launchcalibration.3:In-flightabsoluteradiometriccalibrationforthermalinfraredbandsofHY-1/COCTSbyusingtwodifferentdataThethermalinfraredbandsofHY-1/COCTSarecalibratedafterthefieldexperimentsinQinhailakeinAugust2003.Atthesametime,thewatersurfacetemperaturemeasuredbyAutoHydro-meteorologicalObservationBuoySysteminQinhailakeandNCEPreanalysisdataareusedtocalibratethethermalinfraredbandsofHY-1/COCTS.Theresultscalculatedbythetwodifferentdataareveryconsistent.TheIn-flightabsoluteradiometriccalibrationforthermalinfraredbandsofsatellitesensorswillbeperformedfrequentlybyusingthelaterdataevenwithoutthefieldexperimentsinQinhailake.4:Realizetheon-boardabsoluteradiometriccalibrationforthermalinfraredbandofFY-2BbyusingsynthesisradiometriccalibrationmethodsFY-2Bisageostationarymeteorologysatellite.Theon-boardblackbodyonFY-2Bisobservedbyinsertingthecalibrationmirrorintherareofopticsystem,whichcanrelativelycalibratethesensorbecausethedifferencebetweenthecalibrationopticsystemandtargetopticsystem.Torealizetheon-boardabsoluteradiometriccalibrationforthermalinfraredbandofFY-2B,wecomparethecalibrationresultsobtainedbyusingthewatersurfacetemperaturemeasuredbyAutoHydro-meteorologicalObservationBuoySysteminQinhailakeandNCEPreanalysisdatawiththetemperaturesofon-boardblackbodyandthevariousmirrorsinopticsystem.It’sfoundthatthereisastrongrelativebetweentheTe-TbandthetemperaturesofthevariousmirrorsinopticsystemonFY-2B.Byusingthisrelative,on-boardabsoluteradiometriccalibrationwithhighprecisionforthermalinfraredbandofFY-2Bisrealized.It’sthefirsttimeininternationaltorealizetheon-boardradiometriccalibrationforthermalinfraredbandsofgeostationarysatellitefrequently,whichwillprovidetheimportantapplicationvalue.Keywords:Satellitesensors,Radiometriccalibration,Reflectance-basedmethod,NCEP,Cross-calibration,Geostationarymeteorology,On-boardradiometriccalibration,AutoHydro-meteorologicalObservationBuoySysteminQinhailake81.1[1]1.2-[2]1293EOS-MODIS101.3[3][4][5]XLX=ALAA5123MTF454001000nm11.3.