Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column
This work focuses on developing an inversion scheme to estimate water-column sound-speed fields in three dimensions. The inversion scheme is based on a linearized perturbative technique which utilizes estimates of modal travel times. The technique is appropriate in the littoral ocean where measure...
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ndltd-UTEXAS-oai-repositories.lib.utexas.edu-2152-197072015-09-20T17:14:11ZThree-dimensional geoacoustic perturbative inverse technique for the shallow ocean water columnBender, Christopher MatthewInversionGeoacoustic3DThree dimensionalWater columnThis work focuses on developing an inversion scheme to estimate water-column sound-speed fields in three dimensions. The inversion scheme is based on a linearized perturbative technique which utilizes estimates of modal travel times. The technique is appropriate in the littoral ocean where measurements are made across range and cross-range distances greater than 10 km to ensure sufficient modal dispersion. Previous applications of then inversion technique has been limited to one or two dimensions and/or focused primarily on the seabed. Compared to past applications, the accuracy and uncertainty of the solution is improved by employing approximate equality constraints within the context of \textit{a priori} estimates of model and data covariances. The effectiveness of the constrained technique is explored through a one-dimensional example. The robustness of the technique is illustrated by introducing different types of errors into the inversion and considering the accuracy. A further examination of the technique is given by exploring a three-dimensional example. Several case studies are presented to investigate the effects of different levels of environmental variability and spatial sampling.text2013-03-04T17:46:28Z2012-122012-12-05December 20122013-03-04T17:46:28Zapplication/pdfhttp://hdl.handle.net/2152/19707en_US |
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Inversion Geoacoustic 3D Three dimensional Water column |
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Inversion Geoacoustic 3D Three dimensional Water column Bender, Christopher Matthew Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
description |
This work focuses on developing an inversion scheme to estimate water-column sound-speed fields in three dimensions. The inversion scheme is based on a linearized perturbative technique which utilizes estimates of modal travel times. The technique is appropriate in the littoral ocean where measurements are made across range and cross-range distances greater than 10 km to ensure sufficient modal dispersion. Previous applications of then inversion technique has been limited to one or two dimensions and/or focused primarily on the seabed.
Compared to past applications, the accuracy and uncertainty of the solution is improved by employing approximate equality constraints within the context of \textit{a priori} estimates of model and data covariances. The effectiveness of the constrained technique is explored through a one-dimensional example. The robustness of the technique is illustrated by introducing different types of errors into the inversion and considering the accuracy. A further examination of the technique is given by exploring a three-dimensional example. Several case studies are presented to investigate the effects of different levels of environmental variability and spatial sampling. === text |
author |
Bender, Christopher Matthew |
author_facet |
Bender, Christopher Matthew |
author_sort |
Bender, Christopher Matthew |
title |
Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
title_short |
Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
title_full |
Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
title_fullStr |
Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
title_full_unstemmed |
Three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
title_sort |
three-dimensional geoacoustic perturbative inverse technique for the shallow ocean water column |
publishDate |
2013 |
url |
http://hdl.handle.net/2152/19707 |
work_keys_str_mv |
AT benderchristophermatthew threedimensionalgeoacousticperturbativeinversetechniquefortheshallowoceanwatercolumn |
_version_ |
1716823052448169984 |