Patent ID: 7286077

Claim:
A method of aiding the landing of an aircraft on a runway, said method employing at least one landing aid radio unit and using an angular vertical position of the aircraft, wherein the following operations are carried out in sequence automatically and repetitively: a) determining the position of the aircraft in latitude and longitude in a stand-alone manner; b) determining the position of the threshold of said runway in latitude and longitude; c) on the basis of the positions determined in steps a) and b), a first distance corresponding to the distance in a horizontal plane between the aircraft and the threshold of the runway is computed; d) adding to this first distance the distance in a horizontal plane between a predetermined ground reference point and said threshold of the runway so as to form a second distance; e) with the aid of this second distance and of the value of a measured approach slope of the aircraft, computing a first height corresponding to the relative height of the aircraft with respect to the threshold of the runway; f) subtracting a predetermined metric deviation from said first height so as to form a second height; and g) on the basis of said second height and of said second distance, correcting said angular vertical position of the aircraft, the angular vertical position thus corrected being used to aid the landing of the aircraft.