METHOD FOR DETERMINING THE INITIAL ORIENTATION OF AN OBJECT Russian patent published in 2021 - IPC G01C1/00 G01S19/45 

FIELD: instrument manufacture.

SUBSTANCE: invention relates to the field of precision instrument manufacture and can be used in creating systems for initial orientation of various objects based on the use of satellite measurements. The method for determining the initial orientation of an object consists in the fact that the coordinates of both SNRs in the geocentric coordinate system are determined in the high-precision positioning mode based on the readings from two satellite navigation receivers (SNRs) placed on a rigid base, wherein one of the receivers is located in the centre of mass of the object and the other is located at a known distance therefrom in the direction of the roll axis, wherein the pitch angle is determined by the values of said coordinates as the difference of the angle formed in the geocentric coordinate system by vectors lying between the points of location of the SNRs and between the beginning of the geocentric coordinate system and the centre of mass of the object with a right angle. The azimuth angle is then determined as the angle formed in the geocentric coordinate system by the projection of the vector lying between the points of location of the SNRs on the horizontal plane and the vector lying in the horizontal plane between the centre of mass of the object and the point with the geographical coordinates (latitude and longitude) of the North Pole. The base with the SNRs placed thereon is then set in the direction of the pitch axis, and the new coordinates thereof are determined by the readings of the second SNR, based whereon the roll angle is determined as the difference of the angle formed in the geocentric coordinate system by vectors lying between the points of new location of the SNRs and between the beginning of the geocentric coordinate system and the centre of mass of the object with a right angle.

EFFECT: increase in the accuracy of determining the initial orientation of objects.

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