METHOD FOR DETERMINING VERTICAL ANGLE OF UNDERWATER OBJECT Russian patent published in 2023 - IPC G01S15/00 

FIELD: hydroacoustics.

SUBSTANCE: used to construct navigation hydroacoustic stations for illuminating the near environment, increasing their efficiency and expanding the scope of tasks to be solved. The method involves emitting sounding signals, receiving echo signals reflected from a detected marine object, measuring distance D with a sonar mounted on a moving carrier, and determining the vertical angle of the underwater object, receiving the echo signal with a hydroacoustic antenna with an omnidirectional or weakly directional characteristic, and measuring the horizontal speed movements of the sonar carrier V, measure the emission time of the first probing signal T₁ and distance D₁, measure the emission time of the second probing signal T₂ and distance D₂, determine the path VAT traversed by the sonar during the time (T₂ - T₁) =Δ T, and the vertical position angle of the detected marine object is determined as where S is the area of a triangle with sides D₁, D₂ and VΔ T, and

EFFECT: ability to determine the angular position of a detected object when using an omnidirectional or weakly directional antenna in a vertical plane, which does not require a developed vertical dimension, as well as reducing the time of measuring the vertical position of a detected object.

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