Green's functions extraction between ships of opportunity using a vertical array

Abstract

This work describes a method for extracting the time-domain Green’s function between two ships in a shallow-water environment. First, the individual Green’s functions from each ship are estimated along the vertical receiver array using blind deconvolution. Then, the Green’s function between two ships is obtained simply by either correlation or convolution of the individual Green’s functions, depending on the array position with respect to the ships. Simulation and experimental results are presented and discussed to demonstrate the feasibility of extracting the Green’s functions between ships radiating random broadband noise (100–500 Hz), using a 56.25 m long vertical array in about 100-m deep shallow water.