Aircraft i.e. airplane, and shifted runway distance determining method, involves combining heights and alpha angle to obtain distance from aircraft to elevation beacon, and utilizing distance to obtain location point of aircraft in runway

摘要

The method involves determining a height (Ho) at which aircraft i.e. airplane (1), is found, where the height is determined with respect to a point of a shifted track and measured by a radio altimeter (2) of the aircraft. An elevation angle is determined in a microwave landing system mode by using elevation beacon information provided by an elevation beacon of a main runway. Two heights and alpha angle measured by the beacon are combined to obtain a distance from the aircraft to the beacon. The distance is utilized to obtain a location point of the aircraft in a shifted reference runway.