LAUSR

It is difficult to distinguish between surface and underwater targets in passive detecting with a single sensor or a horizontal linear array in deep water. It is noticed that targets in different depths have different characteristics in time delay difference of rays. This paper takes advantage of this feature to discriminate targets' depths in direct-arrival zone and shadow zone in deep water. And the relation between judgment boundary and depth of sensor is analyzed. The simulation result shows that when the depth of sensor is 50m, the boundary which can distinguish between surface and underwater targets can be set to 10m. And the depth of the boundary decreases with the increase of the depth of sensor.It is difficult to distinguish between surface and underwater targets in passive detecting with a single sensor or a horizontal linear array in deep water. It is noticed that targets in different depths have different characteristics in time delay difference of rays. This paper takes advantage of this feature to discriminate targets' depths in direct-arrival zone and shadow zone in deep water. And the relation between judgment boundary and depth of sensor is analyzed. The simulation result shows that when the depth of sensor is 50m, the boundary which can distinguish between surface and underwater targets can be set to 10m. And the depth of the boundary decreases with the increase of the depth of sensor.