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A scientific echosounder is a device which uses sonar technology for the measurement of underwater physical and biological components—this device is also known as ''scientific sonar''. Applications include bathymetry, substrate classification, studies of aquatic vegetation, fish, and plankton, and differentation of water masses. == Technology == Scientific echosounder equipment is built to exacting standards and tested to be stable and reliable in the transmission and receiving of sound energy under the water. Recent advances have led to the development of the digital scientific echosounder, further enhancing the reliability and precision with which these systems operate. Modern scientific echosounders are reliable, portable, and relatively easy to use. Collected acoustic data is "stamped" with geographic information for precise positional information (coordinates and time). This enables analysis and incorporation of the results into a Geographic Information System (GIS) for further analysis, correlation with other variables, mapping, and display. Currently, the only three manufacturers of scientific-quality digital echsounders commonly used for resource assessment are BioSonics, HTI (Hydroacoustic Technology, Inc.) and Simrad. Other specialty manufacturers of scientific quality echosounders exist. Features of modern digital scientific echosounder technology include: * Low side-lobe transducers * Simple data collection * Low system noise * Wide dynamic range * High system stability * High accuracy * Easy system expansion * Multiplexing systems (multiple transducers can operate simultaneously on the same system) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Scientific echosounder」の詳細全文を読む スポンサード リンク
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