Experimental study of geo-hydroacoustic waves in an ice covered shallow sea

One of the information sources about physical properties of the inhomogeneous medium is a dispersion of surface wave velocity, which amplitude decays exponentially at a depth about the wavelength. In the case of shallow water for the characteristics of the deep bottom recovery the registration of the «bottom» wave propagating along the boundary «elastic bottom–water layer» is required. For this wave registration usually ocean bottom systems are used. The experimental data are accumulated in the memory card that is removed after the measurement with the sensor, or data is transmitted through the satellite transceiver to surface communication channels. In the case of sea covered with ice use of these systems significantly hampered. This paper, based on experimental data shows that the time-frequency analysis of the cross-correlation function of signals, recorded by wideband sensors located on the surface of the ice, allows you to select in the received signal information on the propagation time of the waves between the bottom sensors. The obtained result allows speaking about the possibility of constructing of a sounding of deep inhomogeneous structures in the presence of ice cover with significantly reduced requirements on the practical implementation of this approach.