Two-Color Dual-Polarization Pulsed Bistatic Lidar for Measuring Water Cloud Droplet Size
Two-Color Dual-Polarization Pulsed Bistatic Lidar for Measuring Water Cloud Droplet Size
复制标题
用于测量水云液滴尺寸的双色双偏振脉冲双基地激光雷达
DOI：
10.1007/s10043-000-0235-2
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
N. Sugimoto
中科院分区：
文献类型：
--
作者：
N. Sugimoto
提出了一种用于测量水云粒子尺寸的脉冲双基地激光雷达的概念。该方法使用一个双色激光器和一个接收器与偏振分析仪位于一个合适的散射角。Mie散射对散射角、波长和偏振的依赖性被用来导出水云水滴尺寸。对C1云和C2云的测量进行了模拟，研究了确定模式半径的技术。结果表明，采用1064 nm和532 nm双波长激光器和散射角为178 °左右的双偏振接收器的激光雷达系统可以测量4 ~ 12 μm的云粒子尺寸（模式半径）。对多次散射影响的评价表明，该方法不仅适用于云底测量，而且适用于多次散射不可忽略的云中测量。
The concept of a pulsed bistatic lidar for measuring water cloud particle size is presented. The method uses a two-color laser and a receiver with a polarization analyzer located at a suitable scattering angle. The dependence of Mie scattering on scattering angle, wavelength, and polarization is used to derive water cloud droplet size. The measurement was simulated for the C1and C2clouds, and the technique for determining mode radius was studied. The result shows the lidar system with a two-wavelength laser (1064 nm and 532 nm) and a dual-polarization receiver fixed at a scattering angle of around 178 deg can be used to measure a cloud particle size (mode radius) of 4 to 12 μm. Evaluation of the effect of multiple scattering showed that the method can be applied not only for the measurement at the cloud base but also in the cloud where multiple scattering is not negligible.