Time-of-flight radio location system

(57) By radar composition of summary double atmospheric interference, the direct flight time of a transmitting RF pulse is measured, and this flight time can be measured over an about 1*10 feet range by the jitter of about 0.01 inch of order of free-space distance to about 1 pico second, i. E. , an electromagnetic pulse. A transmitter (53) answers a send timing signal, and transmits the sequence of an electromagnetic pulse, and a receiver (58) samples the sequence of the electromagnetic pulse using the timing response controlled for the above-mentioned sample. A timing circuit supplies a receiving timing signal to a receiver while supplying a send timing signal to a transmitter. A receiver samples the sequence of an electromagnetic pulse with a receiving timing signal so that the sweep of the time between transmission of the pulse of a sequence and the sampling by a receiver may be carried out over the range of a delaying amount.