METHOD OF SURVEYING BOTTOM TOPOGRAPHY OF WATER AREA AND APPARATUS THEREFOR Russian patent published in 2014 - IPC G01S15/89 

FIELD: physics.

SUBSTANCE: unlike the existing method, the present method includes, while emitting hydroacoustic signals towards the bottom, performing magnetic survey using a gradient metre which is towed 5 m from the bottom, seismoacoustic profiling using a profile recorder with operating frequency of 3.5 kHz, measuring the sea level, when processing depth measurements, further performing linear interpolation of the obtained bottom surface through triangulation, when mapping the obtained information with determination of geodesic coordinates of the depth measurements, evaluating the degree of spatial homogeneity of coverage of the survey region by measurement points by determining outer boundaries (contour) of the survey region using the apparatus for surveying the bottom topography of the water area, which consists of a transceiving antenna, a transmitting unit, a receiving-measuring unit, a control unit, a unit for determining the average speed of sound in water, a unit for collecting and processing information and mapping the bottom topography, a multibeam echo sounder, a unit for imaging the region of the bottom topography, a hydroacoustic Doppler log, a satellite navigation system receiver, a heading system, a roll measuring device, characterised by that the apparatus for surveying the bottom topography further includes a towed gradient metre, a profile recorder and a sea level metre, connected by their outputs to the inputs of the unit for collecting and processing information and mapping the bottom topography.

EFFECT: broader functional capabilities while increasing reliability and information value when mapping the bottom topography of a water area based on depth measurements using a multibeam echo sounder.

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