Ray Tracing for Atmospheric Acoustic Waves Using a Hybrid Computer

A description of a three dimensional ray-tracing program for atmospheric acoustic waves is presented. The method uses Haselgrove's equations implemented on a hybrid computer. The program is able to obtain ray-paths for these waves in complex atmospheric models which are both anisotropic and nonhomogeneous. The approach has the advantages of simplicity, low cost, an accuracy more than sufficient for available atmospheric models and an interactive capability whereby results are available at once and may thus be used to select parameters for succeeding runs. Sample results are also given.