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基于Diviner热红外数据的Apollo15登陆区元素含量反演.docx

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基于Diviner热红外数据的Apollo15登陆区元素含量反演 Abstract Asacrucialtoolforlunargeologyresearch,theDivinerLunarRadiometerExperiment(DLRE)aboardtheLunarReconnaissanceOrbiter(LRO)provideshigh-resolutioninfrareddatathatcanbeusedtostudytheelementalcompositionofthelunarsurface.Inthisstudy,thedivinerdatafromtheApollo15landingsiteareprocessedandanalyzedtoextractinformationabouttheabundancesofseveralkeyelements.TheresultsshowthatthelunarsurfaceatApollo15containssignificantamountsofaluminum,silicon,iron,andtitanium,consistentwithpreviousmapsofthelunarsurfacecomposition.ThesefindingssuggestthattheDLREdataisavaluableresourceforfurtherstudyoflunargeology. Introduction Thestudyoflunargeologyiscriticaltoourunderstandingoftheformationandevolutionofthesolarsystem.TheApollolunarmissionsofthelate1960sandearly1970sgreatlyincreasedourknowledgeofthemoon'ssurface,butmuchremainstobelearned.Onekeyareaofinterestisthecompositionofthelunarsurface,particularlytheabundanceofkeyelementssuchasaluminum,silicon,iron,andtitanium. TheDivinerLunarRadiometerExperiment(DLRE)aboardtheLunarReconnaissanceOrbiter(LRO)providescriticalinformationforunderstandinglunarsurfacecomposition.DLREdataisobtainedbymeasuringthethermalradiationemittedbythelunarsurfaceintheinfraredpartofthespectrum.Thisradiationisthenusedtoderivethesurfacetemperature,whichcanbeusedtoinferthecompositionofthesurfacematerial. Inthisstudy,weanalyzedDLREdatafromtheApollo15landingsitetodeterminetheabundanceofkeyelementsinthelunarsoil.OurgoalwastotesttheaccuracyandreliabilityoftheDLREdataforprobingsurfacecompositionandtorefineourunderstandingoftheelementalmakeupofthisregionofthemoon. DataandMethods TheDLREdatausedinthisstudywerecollectedduringtheLRO'sfirstyearofoperation,fromJune2009toJune2010.WefocusedondataobtainedattheApollo15landingsite,whichislocatedintheMareImbriumregionofthemoon.TheDLREdataweusedconsistedofthermalinfraredmeasurementsobtainedatawavelengthof8-22micrometers. TheDLREdatawereanalyzedusingaspectralunmixingmethod,whichconsistsofdecomposingtheme