REMOTE MEASURING APPARATUS FOR SPECIFIC PROPAGATION WAVEFORM OF ELECTROMAGNETIC POTENTIAL

摘要

PROBLEM TO BE SOLVED: To provide a remote measuring apparatus for the specific propagation waveform of an electromagnetic potential, by which the specific propagation waveform of the electromagnetic potential of an object is remotely measured. SOLUTION: A plurality of amplitude threshold gates A1, A2 to which the reception signal output of an antenna 1 is inputted and which prescribe the upper limit and/or the lower limit of a waveform amplitude so as to be capable of specifying an object waveform are set in a time-dependent manner. That the object waveform is passed through a threshold gate means is recorded in a counter 7. As a result signals other than an object signal can be excluded and this apparatus can be used to predict the disaster of an earthquake.