The receiving array antenna equipment consists of two
units of the linear array antenna forming a T-shape, one laid
horizontally and the other place vertically on top and in the
center of the first one forming right angles, as shown in Fig. 3.
Its specifications are listed in Table II. The received signals
were sampled by A/D converters at 4.375 MHz with 12 bits
and stored in the recorder. The array antenna was pointed
towards reference station 3 as the zero degrees angle of the
AOA. Fig. 4 shows an overview of the experimental field from
the receiving point.