METHOD OF DETERMINING DISTANCE ESTIMATION ERROR USING SONAR SYSTEM Russian patent published in 2014 - IPC G01S15/00 

FIELD: radio engineering, communication.

SUBSTANCE: method is intended to determine distance estimation error using a sonar system mounted on an underwater mobile carrier relative a fixed reflector. The method involves emitting probing signals using the sonar system, determining the time of emission, determining the time of receiving an echo signal, measuring the speed of sound, determining the difference between the time of emission and time of receiving the echo signal T, calculating distance, measuring eigen velocity V_sob, determining the angle q⁰ between the position of the fixed object and the direction of movement of the sonar carrier, determining radial velocity of the object V_rad based on two consecutive probing signals, and the distance estimation error b_D is determined using the formula: b_D=0.5((V_rad/cosq⁰)-V_sob)T.

EFFECT: determining error in estimating distance to a fixed reflector while the sonar carrier moves underwater.

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