FIELD: aviation instrumentation, information aids of navigation, sighting and piloting aircraft. SUBSTANCE: technical result of invention consists in increased precision and stability of determination of vector of absolute linear velocity of maneuvering aircraft by complex system " Doppler meter of velocity and drift angle-Gyro-inertial navigation system ". Data of Gyro-inertial navigation system are used to compute anticipated value of closing velocity by each beam of Doppler meter of velocity and drift angle commutated at given moment. On one hand, this signal is controlled by tunable generator of Doppler frequency if present measurement failed. If measurement took place closure error between measured and anticipated values of closing velocity is computed. This closure error is presented by components in coordinate system connected by vector of absolute velocity. Statistics of closure errors is built up taking into account all measurements and then it is processed by statistical technique of " slippage average ". Obtained vector of evaluations of closure errors is employed for more precise and stable correction of Gyro-inertial navigation system. Complex system realizing this method includes Doppler meter of velocity and drift angle, Gyro-inertial navigation system, coordinate converter, algebraic adder, unit processing statistics, computer of matrix of analytical transition, computer of closing velocity and computer of matrix of beam transition. EFFECT: increased precision and stability of determination of vector of absolute linear velocity. 2 cl, 2 dwg
