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dc.contributor.advisorDurkee, Philip A.
dc.contributor.advisorWash, Carlyle H.
dc.contributor.authorBarron, John P.
dc.date.accessioned2012-11-27T18:18:15Z
dc.date.available2012-11-27T18:18:15Z
dc.date.issued1988-03
dc.identifier.urihttp://hdl.handle.net/10945/23335
dc.description.abstractAn established cloud analysis routine has been modified for use in the Arctic. The separation of clouds from the snow and sea ice backgrounds is accomplished through a multispectral technique which utilizes VHRR channel 2 (visible), channel 3 (near infrared) and channel 4 (infrared) data. The primary means of cloud identification is based on a derived channel 3 reflectance image. At this wavelength, a significant contrast exists between liquid clouds and the arctic backgrounds, unlike in the standard visible and infrared images. The channel 3 reflectance is obtained by first using the channel 4 emission temperature to estimate the thermal emission component of the total channel 3 radiance. This thermal emission component is subsequently removed from the total radiance, leaving only the solar reflectance component available for analysis. Since many ice clouds do not exhibit a substantially greater reflectance is channel 3, the routine exploits differences in transmissive characteristics between channels 3 and 4 for identification. The routine was applied to six case studies which had been analyzed by three independent experts to establish 'ground truth'. Verification of the cloud analysis results, through a comparison to the subjective analyses, yielded impressive statistics. A success rate of 77.9% was obtained with an arguably small data base of 131 undisputed scenesen_US
dc.description.urihttp://archive.org/details/anobjectivetechn1094523335
dc.format.extent80 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshMeteorologyen_US
dc.titleAn objective technique for Arctic cloud analysis using multispectral AVHRR satellite imageryen_US
dc.typeThesisen_US
dc.subject.authorarctic cloud analysisen_US
dc.subject.authorAVHRR channel 3en_US
dc.subject.authorsnow/cloud discriminationen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Meteorology and Oceanographyen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMeteorologyen_US
etd.thesisdegree.disciplineOceangraphyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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