DEVICE AND METHOD FOR REDUCING THE PROBABILITY OF FALSE PATHS AND AUTOMATIC ADAPTATION OF THE SECONDARY RADAR TO THE INSTALLATION SITE Russian patent published in 2023 - IPC G01S13/74 

FIELD: air traffic control.

SUBSTANCE: used in secondary radar to reduce the probability of initialization of false tracks. Re-reflective zones are detected using continuously incoming radar information, which is analyzed for reliability, taking into account the duration of the tracks, their beginning and end relative to the visibility limits for the flight altitude of the detected aircraft (AC), taking into account the presence of airports where the aircraft trajectories can begin and end, the presence within the visibility zone of the border with neighboring automated air traffic control systems (ATM-AS), the presence of closing angles, the presence of duplicated information in the forms, as well as the deterioration in the accuracy of determining the AC angular coordinates. The formed zones of re-reflections, when assessing the possibility of establishing new traces, help to speed up the process of detecting illegitimate traces. Tracks whose beginning does not coincide with the re-reflection zones are considered legitimate. When a new track appears inside the multipath zone, the track beginning is checked for coincidence with the end of the runway, if it exists inside the multipath zone, and if the track beginning does not coincide with the runway end, the track beginning is checked for coincidence with the boundary of the ATM-AS coverage area, if it passes through the multipath zone or coincides with the boundary of the multipath zone, if the track beginning coincides with the runway end or the boundary of the ATM-AS coverage area, the track is considered legitimate. In the course of operation, with the appearance of new reflective surfaces, new zones of re-reflections are created or existing zones are expanded. The boundaries of new re-reflection zones are used to identify illegitimate tracks, so that new false tracks do not appear on the control indicator and are not broadcast to the ATM-AS.

EFFECT: increase in flight safety due to an increase in protection against re-reflected signals.

2 cl, 2 dwg