激光大气雷达系统中重合系数的计算

Calculating of the lidar overlap function

为了满足探测的目的,有效获取和反演雷达数据,需要对激光雷达系统的参数进行设计。给出了激光大气雷达系统中重合系数(几何因子)的计算方法,并且结合我校现有的激光大气雷达系统的技术参数,从对0～3km的气溶胶后向散射回波的有效探测出发,讨论了系统参数对重合系数的影响和利用改变系统参数的方法改变重合系数,以实现对激光雷达系统优化设计的可行性。计算和分析表明,该方法简单、直观、有效。

To meet the command of detecting and inversion lidar dates, lidar crossover function must be calculated. In this article, a numerical method of calculating the lidar overlap function (geometrical factor) is presented.Based on our technical parameter of the lidar system, and starting from efficiently exploring backscattering echo which comes back from the 0-3 km aerosol, the influence of each system parameter on the overlap function and the way of changing the overlap function by altering the system parameters in particular are discussed.The feasibility study of optimal design of the lidar system is also carried out. The calculation and analysis results indicate that the method presented in this article is simple, intuitionistic and efficient.