SPECIAL ISSUE — BENCHMARKING GEOACOUSTIC INVERSION METHODSNo Access

The Inversion of Ocean Waveguide Parameters Using a Nonlinear Least Squares Approach

D. P. Knobles

Applied Research Laboratories, The University of Texas at Austin, P. O. Box 8029, Austin, Texas 78713-8029, USA

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R. A. Koch

Applied Research Laboratories, The University of Texas at Austin, P. O. Box 8029, Austin, Texas 78713-8029, USA

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E. K. Westwood

Applied Research Laboratories, The University of Texas at Austin, P. O. Box 8029, Austin, Texas 78713-8029, USA

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, and

T. Udagawa

Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA

Also with Applied Research Laboratories, The University of Texas at Austin.

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https://doi.org/10.1142/S0218396X98000089Cited by:12 (Source: Crossref)

Abstract

An optimization approach is used to estimate waveguide parameters for selected test cases of the Geoacoustic Benchmark Inversion Workshop held in Vancouver, June 1997. The approach uses multiple acoustic data samples to decouple the original N–dimensional problem into several smaller-dimensional problems. A nonlinear least squares approach is used to estimate parameters in each subset. The estimation of parameters in each subset proceeds until convergence is reached. Predicted values are in good agreement with the true values, which suggests that the decoupling of waveguide parameters allows a nonlinear least squares approach to be an effective tool in the inversion of ocean waveguide parameters.