中文摘要：

在多波束测深系统的数据处理中，声速剖面的代表性误差严重地影响着波束的声线跟踪精度，并造成比较大的深度计算误差。为了削弱该影响，利用实测声速剖面数据、温度与盐度剖面数据，采用两种方法分别建立了区域空间声速模型。实践验证了该方法的正确性和可行性。

英文摘要：

In order to weak the effect of the representative error of sound velocity profile （SVP）, a new method, which is used for constructing spatial model of sound velocity and completely reflecting spatial structure of sound velocity, is studied. Two methods for building the local spatial model of sound velocity are given. One is that the model is constructed with SVPs; the other is that the model is constructed with temperature profiles and salt profiles. Both of the two methods can achieve very consistent accuracy and reach about 0.2 m/s in the construction of spatial model. The method is proved to be credible and feasible by an experiment.