An imaging system for analyzing structures comprises a radar transmitter and receiver connected to a timing mechanism that allows a radar echo sample to be taken at a variety of delay times for each radar pulse transmission. The radar transmitter and receiver are coupled to a position determining...http://www.google.fr/patents/US5796363?utm_source=gb-gplus-shareBrevet US5796363 - Automatic position calculating imaging radar with low-cost synthetic aperture sensor for imaging layered media
Automatic position calculating imaging radar with low-cost synthetic ...