FIELD: transport.
SUBSTANCE: invention relates to radar engineering and can be used for creation of takeoff and landing systems for pilotless helicopters. Technical effect consists in providing a possibility of a helicopter autonomous landing on horizontal, inclined and rough surface under conditions of zero visibility and in an adverse weather. To do this circular scanning of the surface is performed, signals are emitted and reflected signals are received in the longitudinal and lateral planes relative to the helicopter successively with 90° pitch, irradiated areas located in pairs in the longitudinal and lateral planes are measured, differential signals of obtained values in each plane are calculated, which are sent to an indicator, when area lengths in the longitudinal and lateral planes are equal a lowering enabling signal is generated, during lowering the vertical helicopter speed is calculated based on measurement of lengths of irradiated areas.
EFFECT: proposed radar method also makes possible to realise the output of lowering enabling signal and to measure lowering vertical speed, as well as has high jamming resistance.
5 cl, 8 dwg
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