Jarzembski M A, Srivastava V, Chambers D M
Appl Opt. 1996 Apr 20;35(12):2096-108. doi: 10.1364/AO.35.002096.
A new calibration technique for continuous-wave Doppler lidars that uses an aerosol scattering target has been developed. Calibrations with both single- and many-particle scattering were performed at the same lidar operating conditions as in atmospheric measurements. The calibrating targets, simulating atmospheric aerosols, were laboratory-generated spherical silicone oil droplets with known complex refractive indices and sizes, hence with known single-particle backscatter cross sections as obtained from Mie theory. Measurements of lidar efficiency with the conventional hard target calibration method were consistently higher by a factor of ~2 than measurements with the aerosol calibration technique. This result may have important implications for lidar backscatter estimates both for aerosol modeling efforts and for optimal design of future lidar systems. The aerosol calibration method provides a validation of basic lidar theory for particle scattering for coherent detection.
已经开发出一种用于连续波多普勒激光雷达的新校准技术，该技术使用气溶胶散射目标。在与大气测量相同的激光雷达操作条件下，进行了单粒子和多粒子散射的校准。校准目标是模拟大气气溶胶的实验室生成的球形硅油滴，其具有已知的复折射率和尺寸，因此具有根据米氏理论获得的已知单粒子后向散射截面。使用传统硬目标校准方法测量的激光雷达效率始终比使用气溶胶校准技术的测量结果高约2倍。这一结果可能对气溶胶建模工作和未来激光雷达系统的优化设计中的激光雷达后向散射估计具有重要意义。气溶胶校准方法为相干检测的粒子散射的基本激光雷达理论提供了验证。
