Split-Step Fourier Method MATLAB Demo Version

This article presents a MATLAB demonstration version implementing the split-step Fourier method. The compressed package includes the main program ssf.m, a sample pulse recording file, and a constant velocity model file. This MATLAB demo version can simulate seismic wave propagation processes, helping seismologists better understand the patterns and characteristics of seismic wave transmission. The split-step Fourier algorithm implemented in ssf.m efficiently handles wave propagation by separating the spatial and spectral domains, using Fourier transforms for diffraction effects and finite differences for medium variations. By utilizing this demonstration package, users can understand the principles and applications of the split-step method, thereby better mastering seismic wave propagation simulation techniques. Notably, this demo version is user-friendly and requires minimal programming expertise to conduct simulation experiments, offering significant practical utility and educational value for geophysical research and teaching.