Abstract: A radar system for transmitting pulsed circularly polarized wave, having two separate receiving channels corresponding to the two mutually orthogonal components of the received wave. Apparatus is included for detecting variations of phase between the two receiving channels and automatically adjusting amplitude and phase of at least one of the two channels in order to compensate for the depolarization effects of rain. For isolating rain return signals and bona fide target signals, the ordinary range gate of a tracking radar plus wide early and late gates are used, applicable to target and rain return signals, respectively.