Next-Generation Earth Radiation Budget Instrument Concepts

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dc.contributor.authorCoffey, Katherine Leighen
dc.contributor.committeechairMahan, James Roberten
dc.contributor.committeememberStern, Curtis H.en
dc.contributor.committeememberPriestley, Kory J.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:47:25Zen
dc.date.adate1998-05-11en
dc.date.available2014-03-14T20:47:25Zen
dc.date.issued1998-11-30en
dc.date.rdate1998-05-11en
dc.date.sdate1998-11-04en
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.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-110398-161755en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-110398-161755/en
dc.identifier.urihttp://hdl.handle.net/10919/35587en
dc.publisherVirginia Techen
dc.relation.haspartCh2.pdfen
dc.relation.haspartCh1.pdfen
dc.relation.haspartetd.pdfen
dc.relation.haspartCh3.pdfen
dc.relation.haspartCh4.pdfen
dc.relation.haspartCh5.pdfen
dc.relation.haspartch6.pdfen
dc.relation.haspartReferences.pdfen
dc.relation.haspartAppendA.pdfen
dc.relation.haspartAppendB.pdfen
dc.relation.haspartAppendC.pdfen
dc.relation.haspartvita.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPERSEPHONEen
dc.subjectCERESen
dc.subjectMonte-Carlo ray-traceen
dc.subjectdiffractionen
dc.titleNext-Generation Earth Radiation Budget Instrument Conceptsen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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