METHOD OF MEASURING COORDINATES OF MOBILE RADAR SET TARGET Russian patent published in 2011 - IPC G01S13/02 

FIELD: physics, radio.

SUBSTANCE: invention relates to aerial defence equipment. The technical result is achieved by that rolling angles are created in accordance with the inclination and direction of motion of a radar set carrier. Compensating tilt angles of the receive/transmit antenna directional pattern of the radar set are calculated for detection on the angle of elevation and azimuth in a stabilised coordinate system. A radio location signal is emitted and received. The position of the receive/transmit antenna directional pattern of the radar set for detection on the azimuth around is successively varied. An extended zone for measuring coordinates of the radar set target is created for detection by successively moving the receive/transmit antenna directional pattern of the radar set for detection on the elevation angle. A radio location signal is emitted and received, while changing the inclination of the front of the electromagnetic wave taking into account the calculated position of the middle of the zone for measuring coordinates relative the horizon in the current viewing row and current value of the base rolling, while maintaining smoothness of compensating for rolling to maintain the quality of Doppler selection of moving targets by limiting the step width of changing the position of antenna directional pattern of the radar for detection on the angle of elevation. The received signal is displayed on a plan position indicator (PPI) of the radar set for detection and a radio location image is formed on the PPI in an 'azimuth-range' coordinate system which is stabilised relative the north and the horizontal plane taking into account rolling angles. The received signal is displayed on the PPI on range in coordination with the delay of the signal reflected from the target, where when displaying the received signal on the PPI, the image is marked synchronously with change in the antenna directional pattern of the radar set for detection on the angle of elevation. The target is detected and a decision is made on the zone where the target is located based on the angle of elevation. Coordinates of the target are read from the screen of the PPI using a movable pointing mark. Coordinates on the azimuth and range in the stabilised coordinate system are also measured using an automatic system for measuring coordinates 'during passing'. The measured coordinates on the azimuth and range of the target are transmitted to the radar set for tracking, taking into account the zone of the position of the antenna directional pattern of the radar set for detection on the angle of elevation. The antenna directional pattern of the radar set for tracking on the azimuth is directed and fine search of the target on the angle of elevation is carried out taking into account the zone where the target is located on the angle of elevation. A radio location signal for the radar set for tracking is emitted and received. The target is detected and locked onto on auto-tracking. Coordinates of the target on the angle of elevation, azimuth and range in the stabilised coordinate system are measured and used to aim weapons on the target.

EFFECT: wider range of measuring coordinates of targets and transmitting target pinpointing at altitude between 6000 and 15000 m.

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