Geoacoustic Inversions of Horizontal and Vertical Line Array Acoustic Data From a Surface Ship Source of Opportunity

The application of an inversion methodology produces the first demonstration of a simultaneous solution for geoacoustic and source track parameters from acoustic data collected in a shallow-water, sandy sediment environment. Inversion solutions from data collected in the 2006 Shallow Water Experimen...

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Bibliographic Details
Published in:IEEE journal of oceanic engineering 2010-01, Vol.35 (1), p.79-102
Main Authors: Stotts, S.A., Koch, R.A., Joshi, S.M., Nguyen, V.T., Ferreri, V.W., Knobles, D.P.
Format: Article
Language:English
Subjects:
Acoustic applications
Acoustic arrays
Acoustics
Arrays
Data mining
Frequency
Geoacoustic inversion
Horizontal
horizontal line array
Inversions
localization
Marine
Marine vehicles
Mathematical models
Methodology
Noise measurement
Propagation losses
Sediments
Ships
Submarines
trackbeam data
Transmission loss
vertical line array
Water resources
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Summary:The application of an inversion methodology produces the first demonstration of a simultaneous solution for geoacoustic and source track parameters from acoustic data collected in a shallow-water, sandy sediment environment. Inversion solutions from data collected in the 2006 Shallow Water Experiment (SW06) are extracted from noise measurements of a surface ship source on an L-array. The methodology includes a screening algorithm to determine a set of frequencies for the inversion data. In addition, the methodology assesses the accuracy of the inversion solution and incorporates an estimation of parameter value uncertainties. The solution from the inversion of the horizontal component of the L-array data from the surface ship source before its closest point of approach (CPA) is used to construct modeled propagation loss for comparison with observed received level (RL) structure as the source departs from CPA. Inversion of the data from a single element in the vertical component of the L-array produces a solution that agrees with the solution obtained from the inversion of horizontal subaperture data. Also, modeled transmission loss (TL) structure obtained from the single-element inversion solution reproduces the depth dependence of the RL structure observed at other elements of the vertical component of the L-array.
ISSN:0364-9059
1558-1691
DOI:10.1109/JOE.2009.2032256