ASA 127th Meeting M.I.T. 1994 June 6-10

2pUW12. Global acoustic propagation modeling using MaCh1.

Michael G. Brown

RSMAS-AMP, Univ. of Miami, 4600 Rickenbacker Cswy., Miami, FL 33149

MaCh1 is a broadband, range-dependent acoustic propagation model based on the one-way form of the Maslov integral representation of the wave field. The one-way propagation assumption may---but need not---be combined with a parabolic approximation. MaCh1 model predictions along multi-megameter great circle propagation paths using climatological sound-speed structure and coarse resolution bathymetry will be shown. Model predictions will be compared to preliminary ATOC (acoustic thermometry of ocean climate) program measurements if the latter are available.