Development of multiple scattering polarization lidar to observe depolarization ratio of optically thick low level clouds
Development of multiple scattering polarization lidar to observe depolarization ratio of optically thick low level clouds
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DOI：
10.1063/1.4975514
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发表时间：
2017-02
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影响因子：
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通讯作者：
H. Okamoto;Kaori Sato;T. Nishizawa;N. Sugimoto;Yoshitaka Jin
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文献类型：
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作者：
H. Okamoto;Kaori Sato;T. Nishizawa;N. Sugimoto;Yoshitaka Jin
研究了光学厚水云中多次散射对后向散射系数和退偏率的影响。我们使用了多视场多散射偏振激光雷达(MFMSPL)系统获得的观测数据。MFMSPL是第一个能够探测光学厚云退偏率的地基激光雷达，它有8个通道，即4个平行通道和4个垂直通道，总视场达到70mrad。MFMSPL为模拟和研究星载激光雷达信号提供了一个独特的机会，包括来自云-气溶胶激光雷达和红外探路器卫星观测(CALIPSO)激光雷达的去偏振率。结果表明，MFMSPL利用8个通道观测得到的衰减后向散射系数和退偏率与CALIPSO激光雷达的值相当。
We have examined the characteristic of backscattering coefficient and depolarization ratio that are affected by multiple scattering in optically thick water clouds. We used observations obtained by the Multiple Field of view Multiple Scattering Polarization Lidar (MFMSPL) system. The MFMSPL was the first ground-based lidar that can detect depolarization ratio of optically thick clouds and it has 8 channels, i.e., 4 for parallel channels and another 4 for perpendicular ones and achieved total FOV of 70mrad. The MFMSPL offers a unique opportunity to simulate and study space-borne lidar signals including depolarization ratio such as from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) lidar. It was shown that the attenuated backscattering coefficient and depolarization ratio constructed by using 8 channel observations by MFMSPL were comparable to the values obtained by CALIPSO lidar.