METHOD OF ACOUSTIC TOMOGRAPHY SYSTEM FIELDS IN THE ATMOSPHERE, THE OCEANS AND CRUST OF DIFFERENT PHYSICAL NATURE IN THE MARINE ENVIRONMENT

摘要

FIELD: physics.;SUBSTANCE: method of hydroacoustic tomography of atmospheric, oceanic and crustal fields of various physical nature in the marine environment, including the formation of low-frequency radiating and receiving channels of the measuring system with their acoustic transducers, placement of acoustic transducers on opposite boundaries of the controlled medium, sounding of the medium by low-frequency luminescent signals of a stabilized frequency and the formation in it of a nonlinear interaction working zone and a parametric preprocess the acquisition of transformed luminescent waves, their amplification in the nonlinear conversion band, narrowband spectral analysis, and the separation of the discrete components of the measured data waves. The radiating unit is formed of three acoustic transducers which are located on the axis of the underwater sound channel (USC), above and below the axis of the USC respectively, and the receiver unit is formed of three linear discrete receive antennas including n elements (hydrophones) each that are horizontally placed in direction of the emitting acoustic transducers, respectively. The working zone of nonlinear interaction and parametric conversion of acoustic luminous and measurable information waves is formed between the radiating and receiving blocks of three emitting transducers and three linear discrete receiving antennas. Luminal acoustic signals are multichannelly receiving previously amplified and by multiconductor cables transmitting to the receiving channel of the measuring system, in which signals are sequentially summed at each cycle of selective connection of discrete reception antennas and a cyclic shift of their elements (hydrophones), form continuous signals which are then amplified in the band and a parametric frequency-time conversion is transferred to a high-frequency region and narrow-band spectra are measured, then isolated spectra of the upper and (or) bottom side strip form and are received in the 2D spectra, and (or) 3D format signals. The operation of narrowband spectral analysis, the formation and presentation of the spectra of measured information fields in 2D and/or 3D format is synchronized with the selective connection mode of discrete receiving antennas and cyclic switching of their elements (hydrophones), as well as the operation of frequency-time transformation (transfer) of multichannelly received signals into the high-frequency region and the operation of forming continuous signals. The spectra of the measured information fields are recorded and transmitted via the radio link to the information and analytical pathway, where the attributes of the measured information fields of the atmosphere and (or) the ocean and/or the earth's crust are determined, as well as the characteristics of their space-time dynamics, time and parametric conversion of received signals in the receiving path and information coming from the Regional Information Center and / or the GLONASS system.;EFFECT: provision of long-range parametric reception of information fields of various physical nature in the marine environment, the formation and presentation of their spatial spectra in 2D and 3D format, and control of their spatial-temporal dynamics in the water areas, tens of hundreds of kilometers long.;6 cl, 13 dwg