METHOD OF DETERMINING ANGULAR POSITION OF AIRCRAFT BASED ON SATELLITE NAVIGATION SYSTEM RECEIVER DATA Russian patent published in 2010 - IPC G01S5/02 

FIELD: physics, navigation.

SUBSTANCE: invention relates to satellite navigation and can be used to determine angular position of aircraft during test flights. The method involves reception of signals from N space vehicles of global satellite navigation systems (SNS) on spaced antennae of reception devices lying on a longitudinal axis and airplane wings, determination of phase difference of pseudo ranges of current signals from each pair of satellites in SNS receivers, comparison of phase differences of pseudo ranges calculated for the same pair of satellites at the same point in time from two SNS receivers under consideration, whose antennae are mounted at the tail 1 and front 2, tail 1 and on the wing 3, and determination of double difference of pseudo ranges between pairs of antennae of reception devices, specifically (1-2), (1-3), based on the comparison results. The code pseudo ranges of the antenna (1) of the SNS receiver mounted on the tail are used to solve the navigation task and determine coordinates (X, Y, Z) of the antenna (1) of the SNS receiver in the Cartesian coordinate system, which are converted to geodesic coordinates in the WGS-84 coordinate system. When calculating angle of orientation, coordinates of position vectors of antenna (2) relative (1) and antenna (3) relative (1) respectively, are calculated first, provided that that magnitude 1⁽²⁾ and 1⁽³⁾ of the unknown vectors and the angle between them are known beforehand. Using the respective calculations, coordinates of relative position vectors of the antennae of SNS receivers are determined. If at a certain stage, phase pseudo ranges to N navigation satellites are known, then using double differences of pseudo ranges, N-1 relationships are determined, which form a system of equations for finding unknown coordinates of relative vectors. Disambiguation of SNS phase measurements is done. After solving the system of equations for calculated coordinates of relative vectors, the angular position of the airplane is calculated. Orientation angles of the airplane are determined during post-flight processing.

EFFECT: increased accuracy of determining angular position of an airplane from satellite navigation system receiver data.

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