US 12,441,486 B2
Landing system and method
Kiran Kumar Chippa, Bristol (GB)
Assigned to Airbus (S.A.S.), Blagnac (FR)
Filed by Airbus (S.A.S.), Blagnac (FR)
Filed on Aug. 25, 2022, as Appl. No. 17/895,515.
Claims priority of application No. 202121039058 (IN), filed on Aug. 28, 2021.
Prior Publication US 2023/0063241 A1, Mar. 2, 2023
Int. Cl. G08G 5/21 (2025.01); B64D 45/08 (2006.01); G08G 5/30 (2025.01); G08G 5/54 (2025.01)
CPC B64D 45/08 (2013.01) [G08G 5/21 (2025.01); G08G 5/30 (2025.01); G08G 5/54 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A landing system for an aircraft, wherein:
the landing system is configured to calculate a reference path for use during a non-precision approach to a runway, the reference path comprising a course, a flight path angle, and an anchor point, the anchor point having a longitude, a latitude, and an altitude;
the landing system is configured to extract from a navigation database a missed approach point corresponding to a first landing threshold point of the runway, the missed approach point having a longitude, a latitude and an altitude;
the landing system is configured such that calculation of the reference path comprises setting the altitude of the anchor point with use of the altitude of the missed approach point;
the missed approach point is associated with the flight path angle;
the landing system is configured to extract from the navigation database a stored landing threshold point of the runway, the stored landing threshold point having a longitude, a latitude and an altitude; and
the landing system is configured such that calculation of the reference path comprises:
calculating a location of a pseudo final end point (pseudo-FEP) for the stored landing threshold point;
calculating a horizontal distance between the missed approach point and the pseudo-FEP so calculated; and
setting the altitude of the anchor point to a value equal to the altitude of the missed approach point less a vertical distance equal to the product of: (i) a tangent of the flight path angle associated with the missed approach point and (ii) the horizontal distance between the missed approach point and the pseudo-FEP so calculated.