基于QINSy软件的声速剖面改正模型研究

Research of sound velocity profile correction model based on QINSy

由声速误差所引起的测深误差是多波束测深误差的主要因素之一,声速剖面的不稳定会引起多波束测深条带发生畸变的现象,导致多波束测深数据精度差甚至无法使用。通过对QINSy软件中声速剖面改正模型的研究,提出了一种多波束测量声速几何修正模型和方法,从几何意义上着手,分析了表层声速及声速剖面误差对测深条带的影响,总结了多波束测深条带随着声速剖面变化而发生对称弯曲的情况。通过模型建立,给出了表层声速及分层声速误差对波束测深值影响的量化值,从而在多波束数据后处理过程中可更好的进行定量分析。

The error of sound velocity is a main factor which causes the muhi-beam sounding error. With the instability of sound velocity profile （SVP）, the distortion in the multi-beam band leads to the low precision on elevation data which is even useless. Through the analysis of SVP correction model in the QINSy software, a new method of geometric velocity correction model was presented,and the effect of surface velocity and SVP error on the multi-beam data was analyzed. The cases of symmetrical bend on the multi-beam band with the SVP variation were summarized. According to the model, the quantized value of the effect about the surface velocity and layering velocity on multi-beam data was proposed.