FIELD: radars.
SUBSTANCE: monopulse radar system installed on a rotary-wing aircraft contains an antenna system, a receiver and a digital computing device containing a command memory. The composite and the residual outputs of the antenna system are connected to the corresponding inputs of the receiving device with its composite and residual outputs connected to the corresponding inputs of the digital computing device. The system additionally includes a sensor with the output connected to an additional input of the digital computing device. The sensor generates an impulse at a certain angular position of the main rotor blades of the aircraft relative to the construction axis of the aircraft. The command memory contains a sequence of commands executed by the digital computing device during the operation of the system, the specified sequence of commands implements determination of the relative angular position of the scan axis of the directional pattern of the aircraft and the angular position of the rotor blades of the aircraft for the target direction finding time point using the time of target location, the time of receipt of the next and the previous pulses from the sensor, and the value of the angular position of the aircraft main rotor blades at the time of generation of the pulse as measured by the system . The sequence of commands implements resolution to determine the bearing to the target, if the angular position of the scan axis of the direction pattern of the antenna system differs from the angular position of each blade of the main rotor of the aircraft at the time of measuring of the bearing to the object by a value not less than the specified one.
EFFECT: reduction to acceptable values of the direction finding error associated with periodic distortion of the directional pattern of the antenna system, as well as the possibility of using the system for direction finding of a target with a direction finding error reduced to acceptable values in the range of azimuthal directions of the scan axis of the direction pattern of the antenna from 0° up to 360° and use of the additional sensor signals entered into the system by other aircraft systems.
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