拖曳方式下的同步测深延时误差探讨

A DISCUSSION ON THE DELAY ERROR OF THE TOWED SYNCHRONOUS DEEP SOUNDING SURVEY

在海上地球物理调查的实际工作中,采用拖曳方式进行测量的方法很多,例如侧扫声纳、浅地层剖面等。这些方法通过同步测深获取拖曳采集时的水深数据。由于固定连接在船体上的测深仪换能器与拖曳在船尾的实际测量点存在一定的位置偏差,因此,将同步测深数据作为实际测量点的水深是存在误差的。主要对拖曳方式下同步水深测量同时不同点引起的误差进行分析讨论。

Tow is often used in marine geophysical survey, such as side-scan sonar, sub-bottom profile and so on. The implementation of such surveys is generally synchronized with deep sounding. But the depth sounder is connected through a hard hull, and there is a certain position error between the depth sounder and the measuring locations, which sometimes affects the accuracy of data interpretation and reduces the accuracy of the results map. In this paper, the error caused by the deep sounding delay is analyzed and discussed.