To accurately measure the direction of incoming radio wave signals received, even when a plurality of receiving units, having receiving antennas, are disposed at remote locations.
A radio wave supervision system includes a plurality of receiving units, respectively constituted of receiving antennas for receiving the incoming radio wave signals, receivers 1a-1n for reception processing the received radio wave signals, A/D converters 2a-2n for digital converting the receiving signals output from the above receivers, and signal processors 3a-3n for performing signal detection processing of the digital receiving signals output from the above A/D converters, so as to output. The system also includes a radio wave measuring portion for measuring the direction of the received incoming radio wave signals from the processing results of the plurality of receiving units; a GPS receiver 10 for generating a 1 PPS signal by capturing a time signal supplied from a GPS satellite; and a trigger signal generator 13 for generating a trigger signal, based on the above 1 PPS signal generated in the GPS receiver, and for starting the signal detection processing by each signal processor in the plurality of receiving units by means of the trigger signal.
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka
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