This software package aims to enable engineers and researchers concerned with radiowave propagation studies and applications in communications, broadcasting, radar and remote sensing to quantify radio field strengths over ground. The ground may be homogeneous or inhomogeneous, smooth or irregular in height, and the model of the earth used may be planar or spherical. The authors use an original technique for solving the complex mathematics involved, demonstrated in a related book, Radiowave Propagation Over Ground , also published by Chapman and Hall. This book should be of interest to engineers, scientists and graduate students in microwave and R F for telecoms, radar and remote sensing.