Aiming at the problems of large amount of sound velocity data, long time-consuming and low efficiency of sound ray tracing in deep-sea environment when establishing the ocean geodetic reference network, an efficient simplification method of sound velocity profile using effective area algorithm is proposed.By calculating the effective area between adjacent three points on the sound velocity curve, the search threshold of proportional coefficient is set, and the area value calculated by each data point is compared with the threshold to determine whether the data points are eliminated, so as to realize the efficient simplification of sound velocity profile.The experimental analysis is carried out by using the measured underwater acoustic data in part of the South China Sea.The results show that the proposed method can simplify the sound velocity profile by more than 84 ％, and the sound ray tracing efficiency is improved by more than 6 times.The optimal solution of the threshold coefficient in the method is given, so that the positioning error is controlled within 0.2 m, which provides a reference for the simplification of the sound velocity profile.
关键词
水声定位/声速剖面精简/有效面积/阈值系数/声线跟踪误差
Key words
acoustic positioning/sound velocity profile simplification/effective area/threshold coefficient/sound ray tracing error
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