Geoacoustic model parameter estimation using a bottom-moored hydrophone array

R.M.S. Barlee

doi:10.1109/JOE.2005.862574

Geoacoustic model parameter estimation using a bottom-moored hydrophone array

2005-10-01

11

PRE

AI

DOI：10.1109/JOE.2005.862574

Original

Original request for help

Save

Abstract

En 中文

This paper describes results from an experiment carried out to investigate geoacoustic inversion with a bottom-moored hydrophone array located in the shallow waters of the Timor Sea off the northern coast of Australia. The array consisted of two arms in a V shape, horizontally moored at a site that was essentially flat over a large area. Hydrophone positions were estimated using an array element localization (AEL) technique that established relative uncertainties of less than I m on the seafloor. The data used for geoacoustic inversion were from experiments with continuous wave (CW) tones in the 80- to 195-Hz band transmitted from a towed projector. A hybrid search algorithm determined the set of geoacoustic model parameters that maximized the Bartlett fit (averaged coherently spatially at each tone and incoherently over frequency) between the measured and modeled data at the array. Due to the long range experimental geometry, the inversion was sensitive to attenuation in the sediment. The inverted geoacoustic profile performed well in a simple test for localizing the sound source at other sites in the vicinity of the array. Range-depth localization performance for the horizontal array was comparable to that for an equivalent vertical array.

Keywords:

geoacoustic

horizontal array

inversion

localization

matched field processing

Geoacoustic model parameter estimation using a bottom-moored hydrophone array

Abstract

Journal

Organization