Multicriteria Collision Risk Ranking of Aircraft by Data from an Onboard Radar Station

Improvement of Digital Device for Suppression of Erroneous Request by Lateral Petals of the Antenna of Air Traffic Control Systems

“…Given that the radiation pattern of the radar system of the main petal has an angle of 2 o -4 o in the horizontal plane depending on the type of radar system and the request period of terrestrial radar stations is 500 Hz, and the antenna rotation speed is 10 rpm [6], and the distance between pulses P1 and P3 is 14 μs [7], then due to simple calculations it can be determined that during the stay of the aircraft within the directional pattern of the main petal will be requested 17 times and the same number of responses, which in turn leads to ambiguity fixing the definition aircraft in azimuth, especially over long distances [9][10][11][12]. The goal is to respond to the aircraft responder when asked when approaching the middle of the directional pattern of the antenna of the main lobe, where the highest power of the emitted signal, which will significantly reduce the error of determining the aircraft by azimuth.…”