FIELD: navigation.
SUBSTANCE: according to the first version, the device comprises four single-beam Doppler velocity pickups, two circuits for adding frequencies, three AND circuits, and control unit. According to the second version, the device has four single-beam Doppler velocity pickups, two circuits for adding frequencies, two circuits for subtracting frequencies, six AND circuits, and two control units. According to the third version, the device comprises four single-beam Doppler velocity pickups, two circuits for adding frequencies, four circuits for subtracting frequencies, nine AND circuits, and three control units.
EFFECT: enhanced reliability.
3 cl, 5 dwg
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