METHOD OF AIRCRAFT NAVIGATION Russian patent published in 2014 - IPC G01S5/02 

FIELD: aircraft engineering.

SUBSTANCE: proposed method consists in the use of terrain reference map, selection of measured terrain section with the boundaries of reference map, and compilation of the first current map of measured section in equal time intervals, second and third current maps of said measured section. Said compilation is performed by measurement of inclined ranges with the help of multi-beam measurement by radio waves. It includes the determination of difference in measurement results in first, second and third current maps. Besides, it comprises the first current and reference maps, second current and reference maps, third current and reference maps within the boundaries of the first, second and third squared uncertainty, respectively. Note here that sizes of the second and third squared uncertainty are notable smaller than those of their first squared uncertainty. It includes coordinates (planned coordinates and altitudes) of aircraft first, second and third positions in planed coordinates of reference map. Coordinates of aircraft first, second and third locations are compared. Aircraft bearing, speed and acceleration are determined. Flight path correction signal is computed to control aircraft flight.

EFFECT: higher accuracy of navigation.

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