METHOD FOR ASTRONOMICAL CORRECTION OF AIRCRAFT NAVIGATION PARAMETERS Russian patent published in 2022 - IPC G01C21/02 

FIELD: physics.

SUBSTANCE: invention relates to navigation of mobile technical systems and can be used in autonomous navigation systems of aircraft, in which it is required to determine with high accuracy of absolute coordinates of location in conditions of complete autonomy. Method of correcting an inertial navigation system of an aircraft using an astronomical system involves automatic prediction and determination of the correction region, obtaining a current image of navigation stars and generating correction coordinate corrections. At the same time, at the pre-launch preparation stage, the actual fragment of the database of navigation stars of available visibility is determined depending on the hemisphere and the month of the launch of the aircraft along the entire flight path, during the flight of the aircraft, the direction of the lens of the astro-viewing device relative to the navigation stars is predicted. At the moment the predicted space area enters the lens, photographing, image processing and superimposition of the constellation reference image from the database are performed, coordinates of stars on the image in pixels and orientation angles of the image, the angle of inclination of the image, the azimuth of the direction of shooting and the angle of rotation of the image, as well as the equatorial coordinates of the aircraft are determined.

EFFECT: increased accuracy of aircraft positioning in autonomous mode, when using astro-viewing device, due to zeroing of increasing errors of inertial navigation system.

1 cl, 3 dwg