PROCEDURE ESTABLISHING WIND VELOCITY Russian patent published in 2003 - IPC

FIELD: development of new and updating of existing sight-and-navigation systems of aircraft. SUBSTANCE: value Fm of angle of magnetic declination in flight area of aircraft as well as values of eccentricity E and semi-major axis A of reference ellipsoid of the Earth are entered into computer and stored. In process of flight of aircraft at time moment To values of geographic latitude and longitude of position of aircraft are determined on aircraft with the use of satellite navigation system, values of magnetic course Fo, altitude and modulus V of velocity vector of aircraft flight are measured and entered into computer of aircraft. From time moment To to preset time moment Tk aircraft is flying with constant values of magnetic course, altitude and velocity equal to measured values of Vo, altitude and velocity. At time moment Tk time increment dT=Tk-To is measured on aircraft and values of geographic latitude and longitude of position of aircraft are found with the aid of satellite navigation system. Values dT, geographic latitude, geographic longitude at time moment Tk are entered into computer of aircraft which computes values of modulus V and of angle Fb of orientation of wind velocity with reference to geographic meridian. EFFECT: determination of wind velocity under conditions of rain, fog and continuous cloudiness from aircraft without employment of any radio engineering radiation which decamouflages it. 2 dwg