Patent ID: 6133866
Filing Date: 2000-10-17
Classification: G01S

Abstract:
In a computer-controlled radar system operating in the presence of a stand-off barrage-type jammer, the method of reacquiring a target under track as it exits from the effective zone of the jammer, wherein the average power, P.sub.J, of such a jammer is of sufficient magnitude to mask the power, P.sub.T, of a target return signal, comprising:(a) turning off the radar transmitter and passively determining the angular location, .theta..sub.J, and the average power, P.sub.J, of the jammer when the target return signal is masked by the jammer;(b) activating the radar transmitter when the target exits from the effective zone of the jammer and measuring the average angle, .theta., and the average power, P.sub.J+T, of the target plus jammer;(c) calculating the angular location, .theta..sub.T, of the target relative to the antenna boresight axis in accordance with the following: ##EQU2## (d) range and angle gating the signals received by the radar to reinstitute tracking of the target.