RDA - Receiver
As the antenna intercepts returning (backscattered) energy, it routes the energy, or returned signal, to the receiver. The WSR-88D receiver "listens" for data in both the horizontal and vertical channels simultaneously. The amount of returning energy is minute in comparison to the originally transmitted signal. To aid in processing, the receiver amplifies the returned signal, adjusts its frequency, and then digitizes the signal using an Intermediate Frequency Digitizer (IFD). In this process, the receiver captures the amplitude and phase information needed to compute all of the base data moments.
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