Waveguide Mode Selection from Broadband Signal Using Two Vertical Line Arrays in Shallow Water

Within the framework of the model of a shallow-water waveguide with a layered bottom, a theoretical study and numerical calculation of the correlation function of a broadband signal received by two synchronized vertical line arrays was carried out. The correlation function is constructed in coordinates (wave vector, frequency
$-(\mathbf{q},\boldsymbol{\omega}))$
. This technique makes it possible to retrieve dispersion dependences of different waveguide modes both concentrated in water layer (high phase speed) and in bottom layer (low phase speed), and, subsequently, to estimate the bottom parameters, including the characteristics of the sub-bottom layer: for example, sound speed and thickness. Experimental setup is discussed.