Fig. 1.
Coordinate system and source-sensor configuration used in the numerical experiments. The coordinate origin was set at the center of the sensor coil located at the center of the array. The plane at x = 0 cm is shown. The two point sources, shown by the small filled circles, were located on the line (x = 0; z = −6) cm. The time courses assigned to the two sources are shown in the two upper panels.