3D graphics of ray and modal solutions to Lilley's equation

Dataset supporting: "Stone et al. Aeroacoustic catastrophes: upstream cusp beaming of jet noise". This zip file contains two Mathematica Notebooks and CDF (Computational Document Format) files. 1. A spherical polar wrap of the modal solution to Lilley's equation with point source. The overlaying structures are defined in the above paper. 2. Cusp rays. Ray trajectories that form the Note that the Notebook files require the user to have a Mathematica license, whereas the CDFs is an interactive document that can be viewed using a free-of-charge CDF viewer.