HIGH PRECISION RADAR TO TRACK AERIAL TARGETS

摘要

High precision radar to track aerial targets installed on the ground, in a container or in a vehicle, to determine the target parameters, such as azimuth angle (¸ a ), elevation angle (¸ e ), range, speed and flying direction and transmits them to a weapon system which comprises an array of two collinear antennas (19, 21) with narrow beam in elevation, installed on a platform (12) and rotating around a vertical axis at a rotational speed of, at least, 50 rpm, in which the direction of the said array varies between 0° and 90° by means of a positioning motor in elevation (18), and the precise target elevation angle (¸ e ) is determined by interferometry. The precise target azimuth angle (9a) is determined through correlation between a signal detected by the said antennas (19, 21) with a +1/-1 step function, complemented by the search for the zero transition provided by the determination of the return pulse maximum. The target speed and direction values are determined by a prediction filter (50) based on the history of range, elevation and azimuth values obtained in previous measurements.