A high-speed, compact, and interactive Parabolic Equation SOlution GENerator (PESOGEN) system

A special purpose microcomputer to solve the parabolic approximation to the acoustic wave equation using the split step Fourier algorithm has been developed. The Parabolic Equation SOlution GENerator (PESOGEN) is a dedicated, fast, compact, and interactive computer system consisting of a host processor, a high-speed array processor, a graphic processor, and a color display monitor. PESOGEN is able to compute the acoustic field in a fully range dependent environment for both deep and shallow water scenarios with computational speed an order of magnitude faster than current mainframes such as the UNIVAC 1108. Transmission loss values are color contoured and are available as the solution is being generated, providing almost real time interaction with the acoustic modeler. Additional graphic capability includes transmission loss displayed as a function of range at any depth, bathymetry, and sound speed profiles superimposed on TL color contoured field. Typical throughput time for a deep ocean environment to cover 14 CZs ranges from 16 to 100 s. Sample outputs from the PESOGEN that clearly demonstrate acoustic energy distribution in the acoustic field are presented.