FIELD: aircraft instrumentation engineering; navigational instrumentation, aiming and pilotage systems.
SUBSTANCE: proposed method includes measurement of Doppler frequencies in optical range of electromagnetic waves and additional operation of gating the optical signals reflected both from ground surface and from air medium. Doppler frequencies relative to ground and air media are separated and vector of air speed of flying vehicle is additionally reckoned; then two respective systems of kinematic equations are solved and estimations thus obtained are used for correction of gyro-inertial navigational system air speed reckoning system, thus obtaining magnitudes at outputs defined more accurately; drift angle is determined as angle between three-dimensional vectors of ground and air speeds of flying vehicle. Complex laser unit proposed for realization of this method includes laser meter for measurement of Doppler frequencies, air speed vector reckoning unit, computer for determination of "air-ground" gating boundary, increments of ground and air speeds, drift angle, matrix for transit between body-axis coordinate system and beam-type coordinate system, two static treatment units, five coordinate converters and three changing units.
EFFECT: enhanced accuracy and stability of determination of air and ground speed vectors and drift angle.
3 cl, 4 dwg
