where [] m/sec. This signal is transmitted to the PCC associated with the kth element via the transmission line of length [], . Let [] where [] is the phase velocity in the transmission line. The phase, at time t of the input to the kth PCC is obtained from (1) simply by subtracting the phase delay [], from t throughout (A-l) thus The reference phase at time t is Note that the input and reference frequencies, [] and [](t) respectively, are not, in general, the same since we do not assume []. --- We describe the operation of the PCC by the equation where R > 0 is the transponding ratio. (A4) describes any PCC which uses as its phase reference the pilot signal received by one of the elements of the ARA. Substituting (A2) and (A3) into (A4) gives
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