Gregory J. Orris
Michael D. Collins
Naval Res. Lab., Washington, DC 20375
A method was previously reported for solving three-dimensional propagation and backscattering problems involving a range-dependent environment that is separable in one of the horizontal Cartesian coordinates. With this approach, the two-dimensional parabolic equation (PE) is modified by a separation constant that appears in the wave-number term. The self-starter has been modified to generate an accurate starting field for this problem. Large-scale problems can be solved efficiently when this approach is combined with the split-step Pade solution. This two-way PE is one of the few deterministic, three-dimensional reverberation models in existence and may be applied to problems involving a point source, a beamed array of sources, gradual range dependence, and scattering facets.