1. The concept of an angular spectrum of plane waves and its relation to that of a polar diagram and an aperture distribution;Booker;Proc. IEE, London,1950
2. Some aspects of the rapid directional fluctuations of short radio waves reflected at the ionosphere;Bramley;Proc. IEE, London,1955
3. Coates , R. J. T. S. Golden Ionospheric effects on telemetry and tracking signals from orbiting spacecraft Greenbelt, Maryland. 1968
4. Daly , R. F. Signal design for efficient detection in randomly dispersive media Menlo Park, California. 1965
5. SRI Project;Eshleman,1960