METHOD FOR COVERT HYDROACOUSTIC SEARCH FOR AN AUTONOMOUS BOTTOM UNDERWATER OBJECT Russian patent published in 2021 - IPC G01S15/00 

FIELD: surveillance.

SUBSTANCE: area of application: the invention relates to the field of underwater navigation and can be used in hydroacoustic monitoring systems for various purposes, integrated underwater surveillance systems, positional network-centric networks for covert hydroacoustic search for underwater objects located at the bottom of a known marine area from a surface search vessel in standby mode after completing the corresponding mission. Substance: the substantial differences of the claimed method are the use of adaptive coherent compensation for concentrated interference of interfering shipping traffic in partial reception paths of a direction-finding antenna, performed in pauses between the intervals of emission of a navigation signal from the underwater object, with frequency separation of interference from different surface sources in three selected sub-bands of frequencies and suspension of coherent compensation for the duration of reception of the navigation signal of the pinger beacon, when processing a navigation signal of the pinger beacon of an autonomous bottom underwater object on the search vessel, performing linear amplitude detection and post-detector addition of signals of partial reception paths of the direction-finding antenna after coherent compensation, which in combination allows for covert hydroacoustic search for an autonomous bottom underwater object in conditions of influence of concentrated interference of near and far shipping traffic.

EFFECT: provided covert hydroacoustic search for an autonomous bottom underwater object from a surface search vessel in conditions of influence of concentrated interference of near and far shipping traffic, implemented by modifying the structure of processing the navigation signal of the pinger beacon of an autonomous bottom underwater object on the search vessel.

1 cl, 9 dwg