文档名:FY3D MWRI在轨交叉辐射定标和海表温度反演
摘要:海表温度(seasurfacetemperature,SST)在气候监测、海洋学研究、渔业经济研究和污染监测等多个方面起着重要作用.本文利用风云三号D星(FY-3D)微波成像仪(MicrowaveRadiationImager,MWRI)数据对海表温度进行了反演.首先,以全球降水测量(GlobalPrecipitationMeasurement,GPM)卫星微波成像仪(GPMMicrowaveImager,GMI)作为参考传感器,采用基于海洋微波辐射传输模型(radiativetransfermodel,RTM)的双差异方法对FY-3DMWRI进行交叉辐射定标,消除了其在轨辐射定标偏差,为精确反演海表温度奠定了基础;然后,在波段选择的基础上提出耦合微波海表发射率的海表温度多波段反演新算法,与传统的多波段反演算法相比,新反演算法的均方根误差从0.74K减少至0.69K;最后,用新反演算法从2020年的FY-3DMWRI数据反演得到全球的海表温度,并用时空匹配的iQuam浮标数据和GMI海表温度产品对反演结果进行精度验证,误差分别为0.04±1.13K和-0.07±1.18K.另外,在相同的条件下,用传统多波段算法反演得到的海表温度的误差分别为0.30±1.17K和0.10±1.17K.新算法的理论精度和实际反演精度均优于传统的多波段算法,说明本文发展的耦合微波海表发射率的多通道反演新算法是有效和精确的.
Abstract:Seasurfacetemperature(SST)playsanimportantroleinclimatemonitoring,oceanographicresearch,fisherieseconomicresearchandpollutionmonitoring.Inthispaper,weinvestigatetheretrievalofseasurfacetemperaturefromtheMicrowaveRadiationImager(MWRI)dataoftheFengyun-3Dsatellite(FY-3D).Firstly,theGPMMicrowaveImager(GMI)onboardtheGlobalPrecipitationMeasurement(GPM)SatelliteisusedasthereferencesensortocalibratetheFY-3DMWRIusingthedoubledifferencemethodbasedontheRadiativeTransferModel(RTM),whicheliminatesthein-orbitradiometriccalibrationbiasandprovidesabasisforaccurateretrievaloftheseasurfacetemperature.Then,basedonthewavebandselection,anewmulti-bandretrievalalgorithmforseasurfacetemperaturecoupledwithmicrowaveseasurfaceemissivityisdevelopedinthispaper.Comparedwiththetraditionalmulti-bandretrievalalgorithm,therootmeansquareerrorofthenewretrievalalgorithmisreducedfrom0.74Kto0.69K.Finally,thenewretrievalalgorithmisusedtoretrievetheglobalseasurfacetemperaturefromtheFY-3DMWRIdatain2020,andtheaccuracyoftheretrievalresultsisverifiedwiththetemporallymatchediQuambuoydataandGMIseasurfacetemperatureproducts,witherrorsof0.04±1.13Kand-0.07±1.18K,respectively.Inaddition,underthesameconditions,theerrorsoftheseasurfacetemperatureobtainedbyretrievalwiththeconventionalmulti-bandalgorithmare0.30±1.17Kand0.10±1.17K.Thetheoreticalandactualretrievalaccuraciesofthenewalgorithmarebetterthanthoseofthetraditionalmulti-bandalgorithm,indicatingthatthenewmulti-channelretrievalalgorithmcoupledwithmicrowaveseasurfaceemissivitydevelopedinthispaperiseffectiveandaccurate.
作者:李子翀 蒋耿明Author:LIZichong JIANGGengming
作者单位:复旦大学电磁波信息科学教育部重点实验室,上海200438
刊名:电波科学学报
Journal:ChineseJournalofRadioScience
年,卷(期):2024, 39(2)
分类号:TP75
关键词:风云三号D星微波成像仪(FY-3DMWRI) 交叉辐射定标 微波海表发射率 海表温度反演新算法 精度验证
Keywords:FY-3DMWRI Intercalibration microwaveseasurfaceemissivity newalgorithmforseasurfacetemperatureretrieval accuracyvalidation
机标分类号:TP79P407.6P731.11
在线出版日期:2024年5月11日
基金项目:国家重点研发计划FY-3DMWRI在轨交叉辐射定标和海表温度反演[
期刊论文] 电波科学学报--2024, 39(2)李子翀 蒋耿明海表温度(seasurfacetemperature,SST)在气候监测、海洋学研究、渔业经济研究和污染监测等多个方面起着重要作用.本文利用风云三号D星(FY-3D)微波成像仪(MicrowaveRadiationImager,MWRI)数据对海表温度进行了反演.首先...参考文献和引证文献
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