Patent ID: 6188356
Filing Date: 2001-02-13
Classification: G01S

Abstract:
A wide area radio monitoring method for monitoring a radio wave from a radio wave source in an area, comprising the steps of:disposing one or more sensor stations;calculating, for each of a plurality of points in the area, incoming directions of the radio wave at each of said sensor stations when it is assumed that a radio wave source is present at the point by a computer simulation in which map information is utilized;observing the incoming directions of the radio wave from said radio wave source at said sensor stations separately for individual propagation paths;comparing the observed incoming directions of the radio wave with results of the computer simulation to find, from within the results of the computer simulation, that result which indicates incoming directions having highest similarity to the observed incoming directions of the radio wave and discriminating a corresponding point to the found out result as a candidate position; andperforming a computer simulation while a position of said radio wave source is successively adjusted on an assumption that said radio wave source is present around the candidate position to determine the position of said radio wave source.