Method and system for calculating an exit trajectory for an aircraft from a weather alert situation

Abstract

An automatic trajectory generation method for an aircraft in flight to exit a meteorological alert situation which: obtains polygons representative of meteorological obstacles; defines two circles centered to the right and to the left with respect to a current in-flight position, of a minimum radius in accordance with the operational state of the aircraft; identifies, for each polygon, candidate external sides for the aircraft to exit; defines straight lines perpendicular to the candidate external sides and tangent to one or both of the circles; determines, for each straight line, a candidate safety position, which is located at a margin distance outside any polygon; forms candidate exit trajectories between the current in-flight position and each candidate safety position; and selects the candidate trajectory which minimizes a time of exposure of the aircraft to any meteorological obstacle. Also a system and an aircraft with such a system.