Patent EA-006094-B1 (EA)
Title: Mode of air traffic control
IPC: G08G7/00
Filed: 2004-02-25
Abstract: Background of the invention: The invention refers to aviation, particularly to modes of air traffic control. Conception of the invention: the mode of air traffic control (ATC) by means of getting the data about aircrafts co-ordinates and their motion parameters, received data processing using the computing complex of ATC computer-based system and computer of every aircraft, air traffic and collision menace data output on the air situation indicator screen. The tendency of flight parameters changing between every aircraft and all others that are in the coverage area of ATC can be calculated by using the computing complex. According to gathered information, all aircrafts that are in the coverage area of ATC are divided in three groups. Every group consists of aircrafts that requires control with the following probability: the first group - with probability equal to zero; the second group - with probability more than zero, but less than one; the third group - with probability equal to one. Aircrafts of these three groups and all their support information are represented in different colors on the air situation indicator screen. Aircrafts from the 2<ND> and the 3<RD> groups are additionally connected by lines with scale marks. The length of one scale unit is equal to the speed of approaching with other aircrafts or obstacles. Using the computing complex of ATC predicted altitudes, longitudinal and lateral distances in the moment of their maximal approximation with other aircrafts or obstacles for the 2<ND> and the 3<RD> groups of aircrafts are calculated either. The above-listed distances are represented by segments supplied with the tracking data that represents information about conflicting situation parameters. At that a segment of longitudinal or lateral distance in the moment of aircraft maximal approximation with other aircrafts or obstacles is supplied with a scale. Such segments also show scale marks demonstrating predicted changes in distance with longitudinal or vertical velocity. Firstly the aircrafts co-ordinates data in a particular moment is defined by means of the satellite navigational system or (and) aircrafts navigational systems, and then this data are transferred to a computing complex where all aircrafts are divided into three groups. After that for aircrafts referring to the third group the correction of their co-ordinates and motion parameters is executed with periodicity less than two seconds; for aircrafts referring to the second group - with periodicity twice as much as periodicity for the third group; for aircrafts referring to the first group - with periodicity four times as much as periodicity for the third group. In the computing complex of each aircraft flight data processing and output is executed only for that aircrafts which are within 250 km. When two aircrafts referring to the third group are approaching, one of the aircrafts is assigned to a local co-ordinate system. Relatively to this co-ordinate system the distance to other aircrafts is calculated, the spline of the motion of one of the aircrafts relatively to others graduated by scale with given aircrafts approaching distance is represented on the air situation indicator screen.