Analysis of Effective Sound Velocity Spatial Characteristic of Typical MUNK Deep Sea Channel

An accurate estimate algorithm of effective sound velocity in deep sea channel based on the earliest arrival criteria is proposed. For a given sound speed profile of the sea and the characteristic of surface and seabed, the method acquires effective sound velocity between any two points in the channel and the physical image of their distribution. Furthermore, the spatial distribution characteristics and reasons of the effective sound velocity of deep sea sound channels under the location of different sound sources are discussed. The spatial distribution of effective sound velocity in deep water channel is of great significance to the underwater acoustic ranging and positioning.