METHOD OF DETERMINING THE SPEED OF SOUND BY THE SONAR UNDER THE SIGNAL DISTRIBUTION PATH TO THE TARGET Russian patent published in 2018 - IPC G01S15/00 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of hydro-acoustics and is intended for measuring the speed of sound by a sonar along a propagation path to a target. Proposed is a method for determining the speed of sound along the propagation path to the target, which contains the emitting of a constant duration probing signal through constant time intervals T, wherein the reception of the echo is carried out by the receiver, determining the speed V_own of the receiving device carrier movement, reception of the echo signal and measurement of its parameters is produced statically by a fan of horizontal directional characteristics with the directivity characteristic width Q° of not more than 2°, determining the time of emission of the first sounding signal t_of1, measuring the reception time of the first echo t_re1 and the number of the directivity characteristic N₁, determining the speed of convergence, deciding on the mobility of the target, speed of sound along the path for a stationary target is determined by the formula C_r=2V_ownT/{(t_re1-t_re2)+T)}, and the speed of sound along the mobile target is determined by the formula , where Δt={(t_of1-t_re1)-(t_of2-t_re2)}.

EFFECT: resulting estimate of the speed of sound will increase the reliability in determining the basic parameters of the target.

1 cl, 1 dwg