学科分类
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10 个结果
  • 简介:Inordertoimprovetheinterpretationoftheearthsystemmicrowaveremotesensing,theresearchofmicrowavespectrumcharacteristicsofthegroundtruth(earthobjects)wascarriedoutinlaboratory.Alaboratoryformicrowaveremotesensingoftheearthobjectshasbeenconstructedtoimprovetheremotesensinglevel,thelaboratoryconsistsoffourparts:themeasuringsystemofdielectricconstants,themicrowaveemissivitymeter,themicrowavereflectometerandthemicrowaveremotesensingsimulationexperimentinfield.Inthispaper,theprincipleofmeasurement,thecorrectionofnearfieldprocess,thestructureofinstrument,thecalibrationmethodandthemeasurementoftheearthsubstances,includingsoil,waterandoil,arediscussed.Thelabora-torymaysupplytheconditionformeasuringtheparametersofthcearthsubstanceremotesensingandhelptointerprettheremotesensingdata.

  • 标签: MICROWAVE remote SENSING ground TRUTH MICROWAVE
  • 简介:NUMERICALSIMULATIONOFDIMETHYLSULFIDEINTHEREMOTEMARINEBOUNDARYLAYERZhengMin(郑敏)andLiXingsheng(李兴生)NUMERICALSIMULATIONOFDIMETHY...

  • 标签: 郑敏
  • 简介:Amulti-functionalsolarandskylightspectrophotometerhasbeendevelopedforthestudyofatmosphericconstituentsandaerosols.Theinstrumentanditsperformancearedescribed.Duetotelescopestructureandlock-inamplificationtechniqueadopted,thesensitivityoftheinstrumentishighenoughtoconductdirectsunmoonandtwilightmeasurementforseveralatmosphericspeciesandthedegreeofpolarizationandintensityobservationforskylight.Frommeasuredresults,thetotalcolumnabundanceofatmosphericspeciesandtheopticalcharacteristicsofaerosolcanberetrieved.Inthispaper,thedailyaveragedcolumnabundanceofO3measuredinBeijingbydirectsunwascomparedwithDobsonspectrophotometernearby.Thetwodidnotshowsignificantdifference.

  • 标签: REMOTE SENSING TRACE gases multi-function SPECTROPHOTOMETER
  • 简介:Remotesensingofrainfallparameters—rainfallrateandsizedistribution—byraindrop-inducedlaserbcamscintillationisanewkindofprecipitationmeasurementtechnique.ThispaperpresentedtheprimaryfieldexperimentresultsbasedonthetheoryandnumericalsimulationsbyWuandLü(1984,1985)andLüandWu(1984).Rainfallrateandsizedistributionwerededucedfromobservationsoflaserbeamscintillationandcomparedwiththoseofthefilter-papersamplingmethod.Qualitativeanalysisoftheexperimenterrorwasalsogivenhere.Alltheworkshowedthatthetheoryisapplicable,andunderproperexperimentconditions,remotesensingofrainfallparametersbylaserscintillationcorrelationisanadvancedandaccuratetechnique.

  • 标签: remote sensing LASER scintillation CORRELATION RAINFALL
  • 简介:精确庄稼生长监视并且产量预报对食物安全和农业的持续发展重要。由遥感和庄稼生长模拟的庄稼收益评价当模特儿在庄稼生长监视并且产量预报有高度潜在的申请。然而,他们俩分别地在机制和地区性的申请有限制。因此,途径和方法论在遥感数据和庄稼生长模拟的联合上学习模型被许多研究人员担心。在这份报纸,调整了并且区域化在诺思中国的WOFOST(世界食物学习)并且由任意地使倾向的叶子散布--叶的一个模型光性质系列(SAIL-PROSFPECT)通过LAI被联合模仿土壤庄稼华盖的调整植被索引(SAVI),由哪个庄稼模型被用一个优化软件(FSEOPT)从遥感数据最小化模仿并且综合的SAVI之间的差别重新初始化。因此,地区性的remote-sensingcrop-simulation-framework-model(WSPFRS)在潜在的生产水平(最佳的土壤水条件)下面被建立。结果如下:在重新初始化以后,由使用遥感数据,开花期,和成熟日期的地区性的出现日期由WSPFRS模型模仿了比WOFOST的模仿的结果更近到测量价值;由重新初始化在拐弯绿色舞台的地区性的生物资源重量,模仿的存储机关重量的空间分发与高价值与测量收益和区域更一致与实际高产量将近一致区域。这研究是基于遥感数据在水压力生产水平开发地区性的庄稼模型的一个基础。[出版摘要]

  • 标签: 冬小麦区 作物生长模拟 遥感资料 耦合模型
  • 简介:Dealingwiththeregionallandsurfacesheatfluxesoverinhomogeneouslandsurfacesinaridandsemi-aridareasisanimportantbutnotaneasyissue.Inthisstudy,oneparameterizationmethodbasedonsatelliteremotesensingandfieldobservationsisproposedandtestedforderivingtheregionallandsurfaceheatfluxesoverinhomogeneouslandscapes.Asacasestudy,themethodisappliedtotheDunhuangexperimentalareaandtheHEIFE(HeiheRiverFieldExperiment,1988-1994)area.TheDunhuangareaisselectedasabasicexperimentalareafortheChineseNationalKeyProgrammeforDevelopingBasicSciences:ResearchontheFormationMecbanismandPredictionTheoryofSevereClimateDisasterinChina(G1998040900,1999-2003).ThefourscenesofLandsatTMdatausedinthisstudyare3June2000,22August2000,and29January2001fortheDunhuangareaand9July1991fortheHEIFEarea.Theregionaldistributionsoflandsurfacevariables,vegetationvariables,andheatfluxesoverinhomogeneouslandscapesinaridandsemi-aridareasareobtainedinthisstudy.

  • 标签: 陆地表面 区域能量通量 干旱地区 半干旱地区 陆地卫星 遥感
  • 简介:Using1°×1°finalanalysis(FNL)datafromtheNationalCentersforEnvironmentalPrediction(NCEP),precipitationdatafromtheTropicalRainfallMeasuringMission(TRMM)andthebest-tracktropicalcyclone(TC)datasetprovidedbytheJapanMeteorologicalAgency(JMA)forJune-Augustof2000-2009,wecomprehensivelyconsiderthetwofactorslow-levelmoisturechannelandinteractionbetweenTCsandmid-latitudesystemsandimplementastatisticalanalysisofremoteprecipitationinEastAsiatothenorthof0°andtothewestof150°E.48casesofremoteprecipitationoccurredinthisperiod,whicharecategorizedintofiveclasses.Afteracompositeanalysisofthedifferentclasses,themainsystemsat850hPaand500hPathatimpacttheremoteprecipitationareasfollows:TC,mid-latitudetrough,subtropicalhighandwatervaporchannel.Inparticular,thewatervaporchannelwhichusuallyconnectswithIndianmonsoonhasthemostsignificantimpactonremoteheavyrainfall.Anotherimportantfactoristhemid-latitudetrough.Thetypeofnorthtrough/vortex-southTCremoteprecipitationeventshappenmostfrequently,accountingfor68.8%ofthetotalincidence.MostremoteprecipitationeventsoccurontherightsideoftheTCpath(representing71%ofthetotalnumber).At200hPa,theremoteprecipitationeventsusuallyoccurontherightrearportionofahigh-altitudejetstream,andthereisananti-cyclonicvortextotheeastandwestoftheTCs.Whenthereisnoanti-cyclonicvortextotheeastoftheTC,theTCisrelativelyweak.WhentheremoteprecipitationoccurstothenorthwestoftheTCandthereisatroughinthenorthwestdirection,theTCisrelativelystrong.NumericalexperimentsarecarriedoutusingWeatherResearchandForecast(WRF)model.TheresultsshowsthattheTCplaysamainroleinproducingtheheavyprecipitationandresultsintheenhancementofprecipitationbyimpactingthewatervaporchannel.

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  • 简介:ThestatisticalcharacterofQuikSCATscatterometerwindsisshowed.AndMonthlychangeandspecialdistributioncharacterofstrongwindfrequencyandmonthlywindfieldsinSouthChinaSeaisanalyzed.ItisshownintheresultthattheQuikSCATscatterometerwindscanberelieduponfortheSouthChinaSea;twowinds,onethewintertimenortheasterlyandtheothersummertimesouthwesterly.ThenortheasterlycentersattheBashiStraitandTaiwamStraitanditssecondarycenterandthemaximumcenterofthesouthwesterlyareinthecentralandsouthernSouthChinaSea.

  • 标签: 年变化 统计学 月变化 强风 风场 东海
  • 简介:Areviewoften-year’spracticeindevelopingtheimprovedsimultaneousphysicalretrievalmethod(ISPRM)isgiveninthehopethatsomecreativeideascanbedrawnfromit.TheimprovementupontheSPRMisassociatedwiththeunder-determinednessofthisill-posedinverseproblem.Inourexperiment,thepreconditionisobservedthatpriorinformationmustbeindependentofthesatellitemeasurements.Thewell-posedretrievaltheoryhastoldusthattheforwardprocessisfundamentalfortheretrieval,anditisthebridgebetweentheinputofsatelliteradianceandtheoutputofretrievals.Inordertoobtainabetterresultfromtheforwardprocess.thefulladvantageofeverypriorinformationavailablemustbetaken.Itisnecessarytoturntheill-posedinverseproblemintothewell-posedone.ThenbyusingtheRidgeregressionorBayesalgorithmtofindtheoptimalcombinationamongthefirstguess,thetheoreticalanalogueinformationandthesatelliteobservations,theimpactoftheunder-determinednessofthisinverseproblemonthenumericalsolutionisminimized.

  • 标签: simultaneous physical RETRIEVAL model(SPRM) statistical regression
  • 简介:ThisbookistheproceedingsoftheNATOAdvancedScienceInstitute“RemoteSensingofProcessesGoverningEnergyandWaterCyclesintheClimateSystem”,heldinPln,Germany1—12May1995.Inthisbook,atotalof21conferencepapersareincludedwithaspecialpartforpostersummaries.Allthepapersaremodifiedorshortenversions

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