METHOD OF DETERMINING TORPEDO PARAMETERS Russian patent published in 2013 - IPC G01S3/80 

FIELD: physics.

SUBSTANCE: in the method of determining parameters of a torpedo moving on a homing trajectory, involving receiving acoustic signals of the torpedo with a hydroacoustic antenna mounted on observer ship, converting the acoustic signal to an electric signal, pre-amplification and primary processing of the received signal, automatic angle tracking of the torpedo, classifying the received signal and determining motion parameters of the torpedo in a computer, includes further reception of probing radiation signals of the torpedo homing system, determining frequency of the probing signal, duration thereof, tracking period and level; classification results are used to determine parameters of the torpedo homing system - antenna area, level of reception acoustic interference; reflectivity of the observer ship is determined; propagation loss and threshold level of the probing signal P_settl are determined using a sonar equation applied to the torpedo homing system; the current signal level P_t is compared with the threshold signal level P_settl and the moment when the condition P_t≥P_settl is satisfied is defined as the moment of detection of the torpedo by the observer.

EFFECT: determining the moment of an observer detects the torpedo homing system, high efficiency of counteracting security of the observer.

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