Parabolic Equation Model
1988
Tran, Jean-Marie
This report deals with a parabolic propagation model now implemented at the Marine Physical Laboratory. This parabolic equation (PE) program is a FORTRAN 77 version of the SACLANTPAREQ program. The parabolic methods were a major development in the field of acoustic modeling. The advantage of the method is the simple way range dependence is handled. Diffraction effects are included, but neither reverberation nor backscattering are accounted for in an earlier document. The parabolic equation requires small angles of propagation from the horizontal and cannot handle steep sound velocity gradients or high frequency propagation because of computer speed considerations. The parabolic equations are derived, the associated numerical algorithms are presented, the environment and the program inputs are described. Finally examples are given. The goal of this report is to provide the potential user the necessary information to understand and use the PE program. Keywords: Differential equations.
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