摘要
To a multibeam echo sounder system (MBES), under water sound refraction plays an important role in depth measure- ment accuracy, and errors in sound velocity profile lead to inaccuracies in the measured depth (especially for outer beams). A method is developed to estimate the sound velocity profile based on the depth measured by vertical beam. Using this depth and other pa- rameters, such as t (sound pulse propagation time), θ (beam inclination angle), etc. We can estimate a simple sound velocity profile with which the depth error has been reduced. This method has been tested with a real dataset acquired in the East China Sea.
To a multibeam echo sounder system （MBES）, under water sound refraction plays an important role in depth measurement accuracy, and errors in sound velocity profile lead to inaccuracies in the measured depth （especially for outer beams）. A method is developed to estimate the sound velocity profile based on the depth measured by vertical beam. Using this depth and other parameters, such as t （sound pulse propagation time）, θ （beam inclination angle）, etc. We can estimate a simple sound velocity profile with which the depth error has been reduced. This method has been tested with a real dataset acquired in the East China Sea.
基金
funded by the National High Technology Research and Development Program of China('863'Program)under contract Nos.2004AA616080 and 2006AA09ZI03
the National Natural Science Foundation of China(Project code:40606026).
