MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING

MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING

The mean and variance of the acoustic field forward propagated through an ocean waveguide containing random internal waves is modelled using a normal mode formulation [1] that takes into account the 3-D interaction of the acoustic field with medium inhomogeneities. The effects of dispersion, attenua...

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Autores principales: Ratilal,Purnima, Chen,Tianrun, Makris,Nicholas C.
Lenguaje:English
Publicado: Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300034
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spelling oai:scielo:S0717-653820040003000342005-05-16MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERINGRatilal,PurnimaChen,TianrunMakris,Nicholas C.The mean and variance of the acoustic field forward propagated through an ocean waveguide containing random internal waves is modelled using a normal mode formulation [1] that takes into account the 3-D interaction of the acoustic field with medium inhomogeneities. The effects of dispersion, attenuation and redistribution of modal energy due to random multiple scattering in the forward azimuth are treated analytically. The inhomogeneous medium's scatter function density is modelled using the Rayleigh-Born approximation to Green's theorem to account for random fluctuations in density and compressibility caused by the internal waves. The generalized waveguide extinction theorem [2] is applied to determine the attenuation due to scattering from the internal wave inhomogeneities. Simulations for typical continental shelf environments quantitatively show how coherent and incoherent acoustic field intensities vary with range, depth and internal wave field propertiesinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300034en10.4067/S0717-65382004000300034
institution Scielo Chile
collection Scielo Chile
language English
description The mean and variance of the acoustic field forward propagated through an ocean waveguide containing random internal waves is modelled using a normal mode formulation [1] that takes into account the 3-D interaction of the acoustic field with medium inhomogeneities. The effects of dispersion, attenuation and redistribution of modal energy due to random multiple scattering in the forward azimuth are treated analytically. The inhomogeneous medium's scatter function density is modelled using the Rayleigh-Born approximation to Green's theorem to account for random fluctuations in density and compressibility caused by the internal waves. The generalized waveguide extinction theorem [2] is applied to determine the attenuation due to scattering from the internal wave inhomogeneities. Simulations for typical continental shelf environments quantitatively show how coherent and incoherent acoustic field intensities vary with range, depth and internal wave field properties
author Ratilal,Purnima
Chen,Tianrun
Makris,Nicholas C.
spellingShingle Ratilal,Purnima
Chen,Tianrun
Makris,Nicholas C.
MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
author_facet Ratilal,Purnima
Chen,Tianrun
Makris,Nicholas C.
author_sort Ratilal,Purnima
title MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
title_short MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
title_full MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
title_fullStr MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
title_full_unstemmed MEAN AND VARIANCE OF THE FORWARD FIELDS PROPAGATED THROUGH 3D RANDOM INTERNAL WAVES WITH RAYLEIGHT-BORN SCATTERING
title_sort mean and variance of the forward fields propagated through 3d random internal waves with rayleight-born scattering
publisher Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate 2004
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300034
work_keys_str_mv AT ratilalpurnima meanandvarianceoftheforwardfieldspropagatedthrough3drandominternalwaveswithrayleightbornscattering
AT chentianrun meanandvarianceoftheforwardfieldspropagatedthrough3drandominternalwaveswithrayleightbornscattering
AT makrisnicholasc meanandvarianceoftheforwardfieldspropagatedthrough3drandominternalwaveswithrayleightbornscattering
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