利用蒙特卡罗(Monte Carlo)方法对机载海洋激光雷达探测过程中,透过波动水表面向下传输的激光束质量受波动水表面影响的程度进行了模拟计算,并给出了定量结果和定性结论。为了获得水下传输的激光束质量相关数据,在传统的蒙特卡罗模型中引入了波动水表面影响模型和接收平面能量分布计算的功能。通过模拟计算,得到了不同海面风速条件下机载海洋激光雷达发出的高斯光束透过波动水表面后在接收平面上的能量分布,得出了随着海面风速的增加,高斯光束的光束质量不断下降,机载海洋激光雷达探测效果不断变差的结论。

The influence of the wavy sea surface on the quality of airborne lidar′s laser beam that transmitted through the wavy sea surface was studied with Monte Carlo method. Simulation results of laser beam energy distribution and the analytical conclusion were presented. In order to obtain the laser beam energy distribution, the classic Monte Carlo model was modified by adding the wavy surface model and the function to calculate the energy distribution of receiver plane. By Monte Carlo simulation, the laser beam energy distributions on certain depth with different sea-surface wind velocities were obtained. From these data, conclusion can be drawn that with the increase of sea surface wind velocity, the laser beam quality decreases, as well as the detection ability of the airborne lidar.