REVSIM—A numerical model for simulating quasistationary, coherent, multibeam reverberation time series

The REVSIM model produces quasistationary, coherent, multiplebeam reverberation time series which are functions of the sonar system (actual transmit/receive, horizontal/vertical beampatterns, pulse type, shape, length and power and sampling rate), platform (speed, depth, and direction) and environment (wind speed and direction, backscatterer strengths, and propagation loss). Volume, surface, and/or bottom reverberation as seen by a sonar on a moving platform are generated. The model first computes reverberation spectra for each beam based on a general formulation of Ol'shevskii. Optimal, all‐pole approximations of the spectra are generated to an arbitrary degree of accuracy using modern linear spectral prediction techniques. The all‐pole approximations are used to generate a set of linear, time‐varying, digital filters with infinite impulse responses (IIR). The filters, when driven by stationary, white, Gaussian noise produce the quasistationary, coherent, multiple‐beam reverberation time series. The prin...