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首页> 外文期刊>Applied optics >Scanning tropospheric ozone and aerosol lidar with double-gated photomultipliers
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Scanning tropospheric ozone and aerosol lidar with double-gated photomultipliers

机译：用双门光电倍增管扫描对流层臭氧和气溶胶激光雷达

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摘要

The Ozone Profiling Atmospheric Lidar is a scanning four-wavelength ultraviolet differential absorption lidar that measures tropospheric ozone and aerosols. Derived profiles from the lidar data include ozone concentration, aerosol extinction, and calibrated aerosol backscatter. Aerosol calibrations assume a clear air region aloft. Other products include cloud base heights, aerosol layer heights, and scans of particulate plumes from aircraft. The aerosol data range from 280 m to 12 km with 5 m range resolution, while the ozone data ranges from 280 m to about 1.2 km with 100 m resolution. In horizontally homogeneous atmospheres, data from multiple-elevation angles is combined to reduce the minimum altitude of the aerosol and ozone profiles to about 20 m. The lidar design, the characterization of the photomultiplier tubes, ozone and aerosol analysis techniques, and sample data are described. Also discussed is a double-gating technique to shorten the gated turn-on time of the photomultiplier tubes, and thereby reduce the detection of background light and the outgoing laser pulse.
机译：臭氧分析大气激光雷达是一种扫描四波长紫外微分吸收激光雷达，可测量对流层臭氧和气溶胶。从激光雷达数据得出的资料包括臭氧浓度，气溶胶消光和校准的气溶胶反向散射。气溶胶校准假设高空区域是空气。其他产品包括云底高度，气溶胶层高度，以及扫描飞机上的颗粒羽流。气溶胶数据范围为280 m至12 km，分辨率为5 m，而臭氧数据范围为280 m至约1.2 km，分辨率为100 m。在水平均一的大气层中，来自多个仰角的数据被组合起来，以将气溶胶和臭氧剖面的最小高度降低到约20 m。描述了激光雷达的设计，光电倍增管的特性，臭氧和气溶胶分析技术以及样品数据。还讨论了一种双门技术，该技术可缩短光电倍增管的门控开启时间，从而减少背景光和激光脉冲的检测。

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