METHOD OF MEASURING DISTANCE OF TRAVEL OF SHIP ON TACK FROM FIXED CONSTELLATION OF SPACECRAFT OF MID-ORBIT SATELLITE RADIO NAVIGATION SYSTEM Russian patent published in 2015 - IPC G01C21/00 

FIELD: radio engineering, communication.

SUBSTANCE: method includes measuring parameters of signals of global navigation system satellites at the beginning and end of travel; converting said parameters into coordinates of the ship at said moments in time and determining the distance of travel; from the obtained overhead information, determining the composition of operating satellite constellations at said moments in time; selecting a group of satellites which is common for both constellations and denoting said group as a single operating constellation for the entire travel time; for the entire travel time, while simultaneously receiving radio signals from spacecraft, receiving radio signals from coastal stations operating in differential mode, and making corresponding adjustments; when measuring radio navigation parameters of signals, estimating the error caused by multipath propagation of radio signals from the spacecraft.

EFFECT: higher accuracy of determining the distance of travel of a ship by eliminating systematic components from the general error of measuring said distance.

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