The final draft of this article is unavailable. R. Benjamin, I. J. Craddock, E. McCutcheon, R. Nilavalan, Synthetic Focusing into the Ground and into Buildings, Using Real Aperture Radar, in Proceedings of the Progress in Electromagnetics Research Symposium (PIERS 2002), Cambridge, USA, July 2002 If you wish to obtain a copy please contact the author below: Rajagopal.Nilavalan@brunel.ac.uk