【作者】 李辉； 杨坤德；

【Author】 LI Hui;YANG Kun-de;School of Marine Science and Technology, Northwest Polytechnical University;

【机构】 西北工业大学航海学院；

【摘要】 海洋波导中,拖线阵接收到的远场信号是经过多途到达的,不是严格的平面波。以典型深海声场模型为基础,通过计算机仿真,研究了拖线阵对远场声源的方位估计误差随接收距离的变化规律。观察到方位估计误差随距离呈周期性变化,并与传播损失随距离的变化规律成正相关。利用射线理论揭示了这一现象的物理机理,研究结果有助于深海目标方位的准确估计。更多还原

【Abstract】 The arrival signals received by a towed-array in the waveguide are not the exact plane waves due to Snell’s law and multipath effect. The response of the towed-array to a remote source varying with distance in deep ocean is investigated by normal mode modeling and computer simulation in this paper. It is observed that the azimuth estimation errors change with distance periodically and the convergence zones have entirely different phenomena comparing with shadow regions. The ray theory is used to explain these results. The results are useful for estimating the accurate azimuth of the target in deep ocean.更多还原