Since the Watson-Watt DF technique falls into the amplitude-comparison category as
discussed above, the purpose of the remaining components of the DF system (i.e., the DF receiver, DF bearing processor, and DF bearing display) is simply to measure the X- and Yaxis
voltages and then compute and display the bearing. (As the reader will recall from the
above discussion regarding amplitude-comparison DF systems, the relative amplitudes of
these two voltages are unique for every wavefront angle-of-arrival). They can therefore be
“mapped” into a corresponding bearing using an appropriate algorithm that performs a
computation based on their ratio.)
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