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dc.contributor.authorCoffey, Katherine Leighen_US
dc.date.accessioned2014-03-14T20:47:25Z
dc.date.available2014-03-14T20:47:25Z
dc.date.issued1998-11-30en_US
dc.identifier.otheretd-110398-161755en_US
dc.identifier.urihttp://hdl.handle.net/10919/35587
dc.description.abstractThe current effort addresses two issues important to the research conducted by the Thermal Radiation Group at Virginia Tech. The first research topic involves the development of a method which can properly model the diffraction of radiation as it enters an instrument aperture. The second topic involves the study of a potential next-generation space-borne radiometric instrument concept.

Presented are multiple modeling efforts to describe the diffraction of monochromatic radiant energy passing through an aperture for use in the Monte-Carlo ray-trace environment. Described in detail is a deterministic model based upon Heisenberg's uncertainty principle and the particle theory of light. This method is applicable to either Fraunhofer or Fresnel diffraction situations, but is incapable of predicting the secondary fringes in a diffraction pattern. Also presented is a second diffraction model, based on the Huygens-Fresnel principle with a correcting obliquity factor. This model is useful for predicting Fraunhofer diffraction, and can predict the secondary fringes because it keeps track of phase.

NASA is planning for the next-generation of instruments to follow CERES (Clouds and the Earth's Radiant Energy System), an instrument which measures components of the Earth's radiant energy budget in three spectral bands. A potential next-generation concept involves modification of the current CERES instrument to measure in a larger number of wavelength bands. This increased spectral partitioning would be achieved by the addition of filters and detectors to the current CERES geometry. The capacity of the CERES telescope to serve for this purpose is addressed in this thesis.

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dc.publisherVirginia Techen_US
dc.relation.haspartCh2.pdfen_US
dc.relation.haspartCh1.pdfen_US
dc.relation.haspartetd.pdfen_US
dc.relation.haspartCh3.pdfen_US
dc.relation.haspartCh4.pdfen_US
dc.relation.haspartCh5.pdfen_US
dc.relation.haspartch6.pdfen_US
dc.relation.haspartReferences.pdfen_US
dc.relation.haspartAppendA.pdfen_US
dc.relation.haspartAppendB.pdfen_US
dc.relation.haspartAppendC.pdfen_US
dc.relation.haspartvita.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectPERSEPHONEen_US
dc.subjectCERESen_US
dc.subjectMonte-Carlo ray-traceen_US
dc.subjectdiffractionen_US
dc.titleNext-Generation Earth Radiation Budget Instrument Conceptsen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
thesis.degree.nameMaster of Engineeringen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairMahan, James Roberten_US
dc.contributor.committeememberStern, Curtis H.en_US
dc.contributor.committeememberPriestley, Kory J.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-110398-161755/en_US
dc.date.sdate1998-11-04en_US
dc.date.rdate1998-05-11
dc.date.adate1998-05-11en_US


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