METHOD OF DETERMINING AIR OBJECT LOCATION BY SIGNALS OF THEIR ON-BOARD RESPONDERS OF AIR TRAFFIC CONTROL SYSTEMS Russian patent published in 2017 - IPC G01S13/74 

FIELD: radio engineering, communication.

SUBSTANCE: method is carried out by means of operations performed on each n-th energetically available on-board responders (BR): simultaneously with the detection of signal packets to determine the flight height by receiving and decoding answer signals to the corresponding queries of the radar identification system and the secondary radar, to determine - the delay of the receiving time for the signal packets of the j-th and n-th BR, to define the ϕ_n BR evaluation azimuth in the position point of the interrogating radars (IR) by the delay , to form a normal reference plane defined by the vector PR (point of reception) - IR and a point in space located on the PR-IR axis with the coordinates Y_n, to form an azimuthal reference plane defined by the azimuth of the n-th BR - ϕ_n in the position point of the IR and perpendicular to the plane of the local horizon at this point, to find a straight position line based on the intersection of the normal and the azimuthal auxiliary planes, to calculate the BR spatial coordinates as a crossing point of the found straight position line and the position surface, given by the earth ellipsoid with semi-axes increased by the value of the BR-H_n flight altitude.

EFFECT: improving the signal processing quality of on-board responders of air traffic control systems.

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