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dc.contributor.advisorWalters, Donald L.
dc.contributor.authorDavison, David Paul, Jr.
dc.dateDecember 1988
dc.date.accessioned2012-11-27T18:17:53Z
dc.date.available2012-11-27T18:17:53Z
dc.date.issued1988-12
dc.identifier.urihttp://hdl.handle.net/10945/23279
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.urihttp://archive.org/details/investigationint00davi
dc.format.extent156 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.titleAn investigation into backscattered cross section calibration of an acoustic sounder used for analysis of lower atmospheric turbulenceen_US
dc.typeThesisen_US
dc.contributor.secondreaderAtchley, Anthony A.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Physics
dc.subject.authorAcoustic echosoundersen_US
dc.subject.authorBackscattered calibrationen_US
dc.subject.authorDifferential scattering cross sectionen_US
dc.subject.authorBackscattered cross sectionen_US
dc.subject.authorContinued fractionen_US
dc.description.serviceLieutenant, United States Navyen_US
dc.description.courseAtmospheric temperature fluctuations quantified by C(r2) degrade the spatial and temporal coherence of electromagnetic and acoustic waves propagating in the atmosphere. A computer controlled atmospheric echosounder developed at the Naval Postgraduate School measures a time averaged C(r2) profile of the lower atmosphere. Assigning the proper C(r2) values to the backscattered return signals depends on an accurate calibration of this instrument. Calibration involves determination of the product of the echosounder's transmission efficiency E(t) and reception efficiency E(r). This thesis provides a preliminary investigation of a calibration process using pulsed acoustic energy backscattered from hard spheres. Supporting software calculates the desired product E(r)E(t) based on an assumption of echosounder efficiency reciprocity. Results of the calibration process investigation indicate the software performs as intended and that the proposed calibration method possesses sufficient merit to warrant further development.en_US
etd.thesisdegree.nameM.S. in Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplinePhysicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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