METHOD FOR REMOTE DETERMINATION OF THE COORDINATES OF THE LOCATION OF A GROUND (ABOVE-WATER) OBJECT Russian patent published in 2021 - IPC G01C23/00 G01S5/00 G01S13/06 B64C19/02 G01S19/48 

FIELD: navigation.

SUBSTANCE: invention relates to navigation, namely to methods for remote determination of the coordinates of the location of a ground (above-water) object, it can be used in the creation of new and modernization of existing systems for determining the coordinates of the location of a ground (above-water) object using both remotely piloted (unmanned) aircraft and in manned aviation. The claimed method consists in recording measurement information from a strap down inertial navigation system (SINS), an optoelectronic system (hereinafter – OES), a radio altimeter, a satellite navigation system (SNS), and an air data system (ADS) installed on an aircraft. The measurement information includes the aircraft coordinates (latitude, longitude, altitude), heading angle, roll angle, pitch angle, azimuth angle, and elevation angle. The length of the line-of-sight vector is calculated. The line-of-sight vector is aligned to the desired position in space using the angles of the aircraft and a quaternion consisting of vector and scalar parts, with the scalar part equal to a random number, and the vector part consisting of the heading angles, roll angle and pitch angle. Next, the line-of-sight vector is normalized and the angle of rotation in the horizontal plane relatively to the design axis of the aircraft is calculated. Then the line-of-sight vector is projected into the coordinate system associated with the OES, where turns are made sequentially along the elevation angle and the azimuth angle. At the last stage of processing, the coordinates of the ground (above-water) object of interest are calculated using the coordinates of the aircraft, altitude, adjustment coefficients, and the calculated length of the line-of-sight vector.

EFFECT: technical result of the claimed method is simplifying the procedure and increasing the speed of pointing the line-of-sight vector, including in conditions of random orientation of the aircraft in space, as well as increasing the speed and accuracy of determining the coordinates of the location of the ground (above-water) object.

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