MODELING 3-DIMENSIONAL PROPAGATION IN AN OCEANIC WEDGE USING PARABOLIC EQUATION METHODS

In this paper the predictions of azimuthally uncoupled and azimuthally coupled parabolic equation (PE) methods for three-dimensional acousti c propagation in a penetrable oceanic wedge are compared. The individu al modes of the waveguide at the source position are used as the initi al field for the PE methods and the resulting PE fields are compared t o the ray diagrams of three-dimensional adiabatic mode theory.