欢迎来到天天文库
浏览记录
ID:53743568
大小:3.22 MB
页数:15页
时间:2020-04-22
《海洋目标的HY-2A卫星微波散射计在轨辐射定标研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、1007—4619(2014)05—1072—15JournalofRemoteSensing遥感学报In.orbitradiometriccalibrationoftheHY-2AmicrowavescatterometerthroughopenoceanmeasurementsMUBo,SONGQingtaoNationalSatelliteOceanApplicationService,Beijing100081,ChinaAbstract:Themicrowavescatterometer
2、onboardHY一2Aoceansatelliteprimarilymeasuressurfacewindspeedanddire:ctionovertheglobaloceans.Aprecisein.orbitradiometriccalibrationofthescatterometeriscrucialtoaccuratelymeasurebothwindspeedanddirection.Thisstudyisthefirsttoperformthein—orbitradiometri
3、ccalibrationoftheseawindsscatterometerontheQuikSCATspacecraftbyusingglobalopenoceanbacksca~ermeasurements.Theoceancalibrationmethodisanalyzedanddiscussedonthebasisoftheresultofweawindsthatwaspreciselycalibrated.Resultsshowthattheaccuracyoftheoceancali
4、brationmethodisapproximatelyO.15dBf0raspecificGeographicModelFunction(GMF).ThedeviationamongdiferentGMFsinoceancalibrationiscausedbysystematicbias.TheGMFmustbeaccurateenoughtorealizetheabsolutecalibrationofthescatterometer.Thecali—brationmethodandresu
5、ltsfromseawindsareusedasabasistoimplementtheradiometriccalibrationoftheHY一2AmicrowavescatterometerOurresultssuggestthatthecalibrationcoeficientsfortheHY一2Amicrowavescatterometerare一1.79dBforVVpolarizationand一1.73dBforHHpolarization.Thewindvectorsofthe
6、HY一2AmicrowavescatterometerarealsovalidatedbywindobservationsfromNDBCoceanbuoys.111eaccuracyofretrievingwindspeedanddirectionissignificantlyimprovedafterapplyingtheobtainedcalibrationcoeficients.Keywords:microwavescatterometer,radiometriccalibration,o
7、ceancalibration,geophysicalmode1functionCLCnumber:TP732.1脚9Documentcode:ACitationformat:MuBandSongQT.2014.In-orbitradiometriecalibrationoftheHY-2Amicrowavescatterometerthroughopenoceanmeasurements.JournalofRemoteSensing,18(5):1072-1086[DOI:10.11834/jr
8、s.20143174]1INTRoDUCTIoNthein—orbitradiometriccalibrationofscanerometersandtodetectsuddeninstrumentanomalieswitl1inashorttimeperiodSpacebomemicrowavescatterometersmeasurewindspeedfStoffe1en.1999).anddirectionovertheoceanusingthenormalizedradar
此文档下载收益归作者所有