Passive source depth discrimination in deep-water

Multiple-array passive acoustic source localization in shallow water.

This paper considers concurrent matched-field processing of data from multiple, spatially-separated acoustic arrays with application to towed-source data received on two bottom-moored horizontal line arrays from the SWellEx-96 shallow water experiment. Matched-field processors are derived for multiple arrays and multiple-snapshot data using maximum-likelihood estimates for unknown complex-value...

Passive Acoustic Thermometry Using Low-Frequency Deep Water Noise

Our previous research effort has demonstrated that coherent processing of shipping noise (100Hz<f<kHz) in shallow water can provide a totally passive means for sensing the ocean environment; but optimizing this correlation process for this relatively high frequency band remains challenging in a fluctuating ocean environment with significant multipath. We hypothesize that using instead significa...

Joint Estimation of Source Range and Depth Using a Bottom-Deployed Vertical Line Array in Deep Water

This paper presents a joint estimation method of source range and depth using a bottom-deployed vertical line array (VLA). The method utilizes the information on the arrival angle of direct (D) path in space domain and the interference characteristic of D and surface-reflected (SR) paths in frequency domain. The former is related to a ray tracing technique to backpropagate the rays and produces...

Source localisation in deep water using waveguide invariant distribution

When recorded on an horizontal array, the acoustic intensity of a broadband source presents a striation pattern due to interferences between modes. This pattern is a robust feature of waveguide propagation and is described by a scalar parameter called waveguide invariant. In classical shallow water configurations, this invariant is close to 1 and has been used to perform source localization or ...

Depth-Shifting of Shallow Water Guide Source Observations