METHOD OF PROFILING BOTTOM DEPOSITS Russian patent published in 2014 - IPC G01V1/38 

FIELD: physics.

SUBSTANCE: method of profiling bottom deposits involves mounting radiating and receiving antennae of a profile recorder on a towed carrier, wherein the radiating and receiving antennae of the profile recorder are separately mounted on the carrier, and the receiving antenna used is a K-element receiving antenna directed along the longitudinal axis of the carrier. The carrier is towed over the bottom. A pulsed acoustic phase-shift keyed signal, which is modulated by an M-sequence, is emitted. The reflected signal is received and undergoes correlation processing with a copy of the emitted acoustic phase-shift keyed signal, wherein amplification and correlation processing of the received signal is carried out with a K-channel receiving circuit. After amplification and correlation processing of signals received by each element of the K-element receiving antenna, Q values of the complex amplitude of the received signal $$S_{qp}^{(к)}$$ are generated. A matrix is formed from Q row elements. Time delay is calculated for each emission time t_pn and arrival time t_q. Time shift and coherent summation operations are repeated for the entire array of data for each element of the receiving antenna. Coherent summation of K signals received by the K-element receiving antenna is performed for each time of arrival of received signals t_q and time of emission t_p. Graphic construction of the profile of bottom deposits is then performed based on the delay time of the reflected signal.

EFFECT: higher resolution of the method of profiling in a longitudinal direction while maintaining a sufficiently large depth of profiling and high resolution in the vertical direction.

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