Radio geo-location system with advanced first received wavefront arrival determination

A system for locating an object comprising:

• coupling, with said object, a tag transmitter which is operative to transmit a signal containing information representative of said object;
• a plurality of spaced apart tag transmission monitoring locations, each having a plurality of mutually diverse antennas coupled to tag transmission readers which are operative to detect said signal transmitted by said tag transmitter;
• reader output processors which are operative to process signals detected by said tag transmission readers to determine which signals received by said tag transmission readers are first-to-arrive signals;
• and
• an object location processor coupled to said reader output processors, and operative to conduct time-of-arrival differentiation of said first-to-arrive signals as detected by said tag transmission readers, so to locate said object.