摘要
为了研究机载双波长米散射激光雷达的技术参数对其探测性能的影响,为该激光雷达的设计与研制提供理论分析依据,使用合适的大气消光模式和机载米散射激光雷达方程,对其接收的大气后向散射回波信号以及信噪比进行了模拟计算,讨论了几何重叠因子和不同消光模式对回波信号的作用,分析了激光脉冲能量、累积激光脉冲数、接收视场、滤光片半宽度等技术参数对信噪比的影响。结果表明设计的机载激光雷达完全可以进行10 km高度以下大气气溶胶和云的探测。
For studying the effects of technical parameters of the airborne dual-wavelength Mie lidar on its detection performance, offering theoretic evidence for the lidar＇s design and development, the airborne Mie scattering lidar equation, appropriate atmospheric extinction model, as well as the design parameters of the lidar are used to calculate atmospheric backscattering signal profiles and the signal-to-noise ratio（SNR） profiles received by the lidar. The effects of overlap function and different atmospheric models on the signal are discussed, and the influences of some technical parameters of the lidar on the SNR are analyzed, such as laser pulse energy, number of accumulated laser pulses, field of view, and filter bandwidth. The results show that the lidar with these design parameters is capable of detecting aerosol and clouds below 10 km altitude.
出处
《大气与环境光学学报》
CAS
2008年第4期250-261,共12页
Journal of Atmospheric and Environmental Optics
