Parabolic equation toolbox for radio wave propagation

A parabolic equation toolbox (called PETOOL) has been developed in MATLAB with a user-friendly Graphical User Interface (GUI) for modeling radio-wave propagation over variable terrain and through homogeneous and inhomogeneous atmosphere (O. Ozgun, G. Apaydin, M. Kuzuoglu, L. Sevgi, Computer Physics Communications, 182, 2638–2654, 2011). The unique feature of the toolbox is that it implements both one-way and two-way Fourier split-step method to take account of both forward and backward propagating waves over variable terrain.