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1、ABriefHistoryofRemoteSensingCindyWebb&KarisaVlasekNASANebraskaSpaceGrant&EPSCoRUniversityofNebraskaatOmahaWhatisRemoteSensing?“Inthebroadestsense,themeasurementoracquisitionofinformationofsomepropertyofanobjectorphenomenon,byarecordingdevicethatisnotinphysicalor
2、intimatecontactwiththeobjectorphenomenonunderstudy;e.g.,theutilizationatadistance(asfromaircraft,spacecraft,orship)ofanydeviceanditsattendantdisplayforgatheringinformationpertinenttotheenvironment,suchasmeasurementsofforcefields,electromagneticradiation,oracousticen
3、ergy.”Quotetakenfromhttp://www.vtt.fi/tte/research/tte1/tte14/virtual/defin.htmlWhatisRemoteSensing?Thetechniqueemployssuchdevicesasthecamera,lasers,andradiofrequencyreceivers,radarsystems,sonar,seismographs,gravimeters,magnetometers,andscintillationcounters.”Scinti
4、llationcountersfromhttp://beckman.com/products/Discipline/Life_Science_Research/pr_disc_gen_scint.asp?bhcp=1Magnetometerfromhttp://www.ssec.honeywell.com/magnetic/magnetometers.htmlSeismographfromhttp://www.terraplus.com/sa/cart/detail.asp?pg={5612B911-E226-40E4-B35
5、E-504277C92A7B}Moderate-resolutionImagingSpectroradiometerImageprovidebyhttp://eos-am.gsfc.nasa.gov/modis.htmlQuotetakenfromhttp://www.vtt.fi/tte/research/tte1/tte14/virtual/defin.htmlHowdidremotesensingbegin?Camerasservedasthefirstremotesensorsover150yearsago.Pictu
6、resofCamerasfromhttp://www.historiccamera.com/cgi-bin/ads/suite/classifieds/classifieds.cgi,cameraspicturednotnecessarilyusedinremotesensing1859–GaspardFelixTournachon1859–GaspardFelixTournachontookcamerasupintoaballoontomakelandsurveys.Hewasnotverysuccessful,butthi
7、sbeganaerialphotography.Unfortunately,thisfirstpictureislost.1860s–Aerialphotosfromballoonscontinuedtobethestandard.Self-Portraitfromhttp://www.profotos.com/education/referencedesk/masters/masters/felixnadar/felixnadar.shtml1873–JamesClarkMaxwellThetheoryoftheelectr
8、omagneticspectrumwasdevelopedbyJamesClerkMaxwell.Theelectromagneticspectrumisarrangedbyfrequencyandwavelength.Imagefromhttp://www.lbl.gov/