多波束声速剖面的动态选取方法

Dynamic selection method about sound speed profile based on multi-beam sounding

在顾及水体声速变化规律与空间位置及时间相关性的前提下,以时间最近法与距离最近法为基础,利用平均声速模型获得深度误差比,再利用深度误差比分析时间最近法与距离最近法的优劣,从而动态选取声速剖面,同时针对动态选取方法的不足进行扩展。实验结果表明,在削弱声速误差影响方面,当参照的水体声速变化规律与实际情况相符时,扩展后的动态选取方法要优于常用方法。

For the relativity between the sound speed characteristic of water and sounding time or spatial position, it acquires the depth error ratio by mean sound speed model based on the nearest neighbor classification method and the most approaching time method. Then, sound speed profile is chosen dynamically by comparing with them. At the same time, the dynamic selection method is developed. The experiment results indicate： if refered sound speed characteristic accords with real situation, developed dynamic selection method is better than the current method.