资源描述：
《Assessment of Mars Pathfinder landing site predictions火星探路者着陆点预测评估》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、JOURNALOFGEOPHYSICALRESEARCH,VOL.104,NO.E4,PAGES8585-8594,APRIL25,1999AssessmentofMarsPathfinderlandingsitepredictionsM.P.GolombekJetPropulsionLaboratory,CaliforniaInstituteofTechnology,Pasadena,CaliforniaH.J.Moore•AstrogeologyTeam,U.S.GeologicalSurvey,Menl
2、oPark,CaliforniaA.F.C.Haldemann,T.J.Parker,andJ.T.SchofieldJetPropulsionLaboratory,CalifomiaInstituteofTechnology,Pasadena,CaliforniaAbstract.RemotesensingdataatscalesofkilometersandanEarthanalogwereusedtoaccuratelypredictthecharacteristicsoftheMarsPathfind
3、erlandingsiteatascaleofmeters.ThestirfacesurroundingtheMarsPathfinderlanderinAresVallisappearsconsistentwithorbitalinterpretations,namely,thatitwouldbearockyplaincomposedofmaterialsdepositedbycatastrophicfloods.Thesurfaceandobservedmaximumclastsizeappearssi
4、milartopredictionsbasedonananalogoussurfaceoftheEphrataFanintheChanneledScablandofWashingtonstate.Theelevationofthesitemeasuredbyrelativelysmallfootprintdelay-Dopplerradariswithin100mofthatdeterminedbytwo-wayrangingandDopplertrackingofthespacecraft.Thenearl
5、yequalelevationsoftheMarsPathfinderandVikingLander1sitesallowedapredictionoftheatmosphericconditionswithaltitude(presstire,temperattire,andwinds)thatwerewellwithintheentry,descent;andlandingdesignmargins.High-resolution(-•38m/pixel)VikingOrbiter1imagesshowe
6、dasparselycrateredstirfacewithsmall•knobswithrelativelylowslopes,consistentwithobservationsofthesefeaturesfromthelander.Measuredrockabundanceiswithin10%ofthatexpectedfromVikingorbiterthermalobservationsandmodels.Thefractionalareacoveredbylarge,potentiallyha
7、zardousrocksobservedissimilartothatestimatedfrommodelrockdistributionsbasedondatafromtheVikinglandingsites,Earthanalogsites,andtotalrockabundance.Thebulkandfine-componentthermalinertiasmeasuredfromorbitaresimilartothosecalculatedfromtheobservedrocksize-freq
8、uencydistribution.Asimpleradarechomodelbasedonthereflectivityofthesoil(estimatedfromitsbulkdensity),andthemeasuredfractionofareacoveredbyrockswasttsedtoapproximatethequasi-specularanddiffusecomponentso
