METHOD OF DETERMINATION OF LOCATION OF SENSING OBJECT IN SEA Russian patent published in 2017 - IPC G01S3/80 

FIELD: physics.

SUBSTANCE: receiving a noise signal from a multi-element antenna. The n directions in the vertical plane are formed. Based on the results of frequency-time processing of the received signal, a multidimensional vector of the measured signal parameters is formed. Preliminary form a set of types of objects, for each of which the level of reduced noise and power spectral density are determined. The parameters of the medium at the observation point are measured. For each type of object, the hydroacoustic field is calculated for the distance-depth grid and a set of multidimensional vectors of the forecast parameters whose composition is identical to the composition of the vector of the measured parameters is obtained. The zones of possible detection of each type of object by distance and depth and form a bank of those vectors of predictive parameters that have fallen into the detection zones are determined. The measure of similarity between the vector of the measured parameters and the vectors of the forecast parameters from the bank is measured. Together they determine the distance to the noisy object, the depth of the immersion of the object and the type of the object as the grid point, in which the measure of similarity is maximal.

EFFECT: increasing the accuracy of the location of the noisy object both in the distance and in the depth of the immersion, while simultaneously determining the type of the observed object, which is especially important for the classification of the source.

1 dwg, 1 tbl