Title :
Application of an improved self-starter to geoacoustic inversion
Author :
Cederberg, Robert J. ; Collins, Michael D.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
1/1/1997 12:00:00 AM
Abstract :
The self-starter is improved using the operator of the split-step Pade solution. In addition to providing greater stability and being applicable closer to the source, the improved self-starter is an efficient forward model for geoacoustic inversion. It is necessary to solve only O(10) tridiagonal systems of equations to obtain the acoustic field on a vertical array located O(10) wavelengths from a source. This experimental configuration is effective for geoacoustic inverse problems involving unknown parameters deep in the ocean bottom. For problems involving depth-dependent acoustic parameters, the improved self-starter can be used to solve nonlinear inverse problems involving O(10) unknown sediment parameters in less than a minute on the current generation of workstations
Keywords :
computational complexity; geophysics computing; inverse problems; nonlinear systems; oceanographic techniques; seafloor phenomena; sediments; simulated annealing; underwater sound; wave equations; acoustic field; depth-dependent acoustic parameters; forward model; geoacoustic inverse problems; geoacoustic inversion; ocean bottom; sediment parameters; self-starter; split-step Pade solution; stability; tridiagonal systems of equations; vertical array; workstations; Acoustic arrays; Acoustic waves; Geoacoustic inversion; Inverse problems; Nonlinear acoustics; Nonlinear equations; Oceans; Sediments; Stability; Workstations;
Journal_Title :
Oceanic Engineering, IEEE Journal of
