FIELD: hydro acoustics.
SUBSTANCE: invention relates to hydroacoustics and can be used to detect a moving sound source, measurement of bearing on sound source and horizon of sound source in shallow sea in passive mode using acoustic combined receivers installed on sea bottom, coordinates of which and angular position are considered known. Into a hydroacoustic system comprising N acoustic combined receivers forming a bottom vertically oriented equidistant antenna, in which distance between combined receivers is equal to predetermined error of determining vertical coordinate (horizon) of sound source Δz, number of receivers N=H/Δz (where H is sea depth), each combined receiver consists of a hydrophone, a three-component vector receiver and amplifiers connected to them, a telemetric unit, the input of which is connected to the output of acoustic combined receivers, comprising voltage dividers, analogue-to-digital conversion circuit, a single electronic multiplexing circuit, a modulator and an optical emitter coupled by an optical link to the optical receiver, as well as a system for collecting, processing and displaying information with a source channel N-channel subsystem, further comprising N-channel direction finding subsystem comprising N-channel unit for generating M spatial channels in each of N channels, wherein M=360°/Δφ, where Δφ - preset bearing determination error, MN-channel unit for generating set of information parameters for total process (S+I), MN-channel unit for extracting from current values of total random process (S+I) current interference values (I), MN-channel unit generating a set of information parameters for interference (I), MN-channel unit for averaging informative parameters for summary process (S+I), MN-channel unit for averaging informative parameters for interference (I), MN-channel signal-to-interference ratio (SIR) unit based on all information parameters, MN-channel comparator, N-channel time-angular distribution (TAD) generating unit in local coordinate system associated with combined receiver, N-channel formation unit (TAD) in geographic coordinate system, unit for generating (TAD) of hydroacoustic complex, N-channel detection subsystem comprising an N-channel unit for generating a set of information parameters for the overall process (S+I), N-channel unit for extracting from current values of total random process (S+I) current values of interference (I), N-channel unit for generating a set of informative parameters for interference (I), N-channel unit for averaging information parameters for total process (S+I), N-channel unit for averaging informative parameters for interference (I), N-channel shaping unit (SIR) on all informative parameters, N-channel comparator, which in each channel allocates an informative parameter, which corresponds to maximum value of 
. It is decided to detect maximum calculated in each channel of N-channel comparator by comparison with threshold value (SIR).
EFFECT: high accuracy of determining the azimuth angle on the sound source in shallow sea conditions and low frequencies, determining bearing on the sound source, as well as increasing the range of action of the complex in the mode of detecting the sound source.
1 cl, 2 dwg
