Geoinformatika 2017; 1(61) : 19-25  (in Ukrainian)

METHODS OF MODERN COMPUTER PROCESSING AND VISUALIZATION OF SONAR INFORMATION

A.I. Gonchar, S.G. Fedoseenkov

Scientific and Engineering Center for Panoramic Acoustic Systems, NAS of Ukraine, 1, Chubanova Str., Zaporizhzhia, 69600, Ukraine, e-mail: sec.pas.nanu@gmail.com

Purpose. The article examines the use of hydrographic information technologies in the study of the water area bottom. It is shown that modern hydro-acoustic equipment permits to obtain not only detailed bottom topography but also additional data on the structure of the upper bottom section.
Design/methodology/approach. The importance of hydrographic software tools for processing and analyzing bathymetry and water column data is determined. Much attention is given to the use of parametric sub-bottom profilers, as well as to the issues of joint presentations of the results of bottom topography and ground maps as three-dimensional images. The article describes the method of processing sonar data profiler using the developed algorithms based on statistical methods and the correlation analysis to assess the likelihood of stratification and to determine the acoustic properties of sediments.
Findings. The most advanced and promising remote evaluation tool of the upper layer of bottom sediments is an instrumental complex, which is based on a side-scan sonar, a profilograph and the Global Positioning System (GPS). Domestic software complexes of hydro-acoustic data processing and visualization developed by modern information technologies permit to build a variety of data models, creating conditions for collaboration of different specialists such as geologists, oceanologists, acousticians, and ecologists.
Practical value/implications. Representative full-scale data on the state of the environment in the area of influence of urban centers with a high degree of anthropogenic pressure and a high level of negative impact on the environment will permit to identify measures to minimize the impact of economic activity on natural systems.

Keywords: topography, bottom sediments, hydro-acoustic prophilograph, geo-acoustic parameters of bottom sediments, interpolation, cubic spline, bathymetric digital maps.

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