Global Positioning System Reference
In-Depth Information
FIGURE 8.4.
The ''Mercedes'' RDF receiver. (a) Waves from a radio transmitter
(arrows) are picked up by three receivers distributed around a wheel. The direction of
the transmitter relative to the wheel is given by bearing angle
a
. (b) The sum of the
signals received by the three receivers depends upon transmitter bearing angle
a
. In
this graph the power of the signal sum is plotted versus
a
. The transmitter direction
can be found by rotating the wheel until the peak signal is obtained.
