Compensator of Trajectory Instabilities of Aviation Radar with Aperture Synthesis

Abstract

A method of compensation for trajectory instabilities of aviation radars with aperture synthesis is proposed. This method allows the further processing of the received signals to consider that the aircraft or the radar carrier is moving along a predetermined trajectory. The estimation of the relative instability of the generator frequency for the microwave range was obtained. It is determined that the exact compensation of trajectory instabilities by measuring this deviation and compensating for it by changing the time interval between the sensing pulses and the received signal is required for each inclined channel. An algorithm for calculating the radar inspection sub-band width is proposed. The use of the proposed method will provide the ability to achieve a resolution better than 4 … 8 meters in the radar synthesizing aperture in the fluctuations of the trajectory of motion of the radar carrier relative to the line of the specified path more than half the resolution almost regardless of the altitude, the degree of turbulence the operating speed and mass of the radar carrier.