WOA18模型在远海地形测量中的运用研究

随着我国远海地形测量的日益频繁,进一步提高测量的效率和精度成为研究的热点。利用WOA18数据,对远海地形测量所涉及海域温盐等海洋要素时空分布规律展开预先分析,由此得到该海域声速垂直和水平分布规律,再利用层内常梯度的声线跟踪方法,对相关海域声速剖面获取频次和线性变化开始深度展开定量研究。结果表明,WOA18数据不但能较好优化远海多波束地形测量声速剖面,还能对声速剖面获取的频次和线性变化开始深度做出较好预测,研究结果对提高远海地形测量的精度和效率具有较高价值。

The application of WOA18 in the deep water topography measurement

With the rapid development of the deep-water topographic survey in our country,improving the measuring accuracy and efficiency becomes the focus of research.The temperature and salt distribution of the study area are analyzed in this paper and the vertical and horizontal distributions of sound velocity are obtained.Further more,a constant velocity acoustic ray tracing algorithm is used to explore how many casts are necessary and the linear sections of the sound speed structure.The results showed that not only the WOA18 can optimize the sound velocity profile,but also can explore how many casts are necessary and the linear sections of the sound speed structure.This research is valuable for improving the accuracy and efficiency of the deep-water topography measurement.