Ultraviolet rotational Raman lidar for high accuracy temperature profiling of the planetary boundary layer
Ultraviolet rotational Raman lidar for high accuracy temperature profiling of the planetary boundary layer
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DOI：
10.1117/12.819588
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
Jiandong Mao;Z. Xie;Min Wu;Dengxin Hua;F. Gao
中科院分区：
文献类型：
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作者：
Jiandong Mao;Z. Xie;Min Wu;Dengxin Hua;F. Gao
研制了一种波长为355nm的旋转拉曼激光雷达系统，用于测量对流层下层行星边界层的垂直温度分布。采用高分辨率光栅和两组窄带干扰滤波器抑制弹性米氏散射和瑞利散射信号，分离两个旋转拉曼信号进行温度反演。两个干涉滤光片的中心波长分别位于353.9 nm和352.5 nm，其旋转拉曼光谱的波长温度系数符号相反。为验证原型机的可行性，进行了初步实验，结果表明，在300 mJ激光能量和~8 min观测时间下，在2 km高度下，该系统的温度灵敏度为0.43%/K，统计温度误差小于1K。
A rotational Raman lidar system at a wavelength of 355 nm has been developed for measuring the vertical temperature profile of the planetary boundary layer in the lower troposphere. A high-resolution grating is employed with two sets of narrowband interference filters to suppress the elastic Mie- and Rayleigh-scattering signals and to separate two rotational Raman signals for temperature retrieval. The central wavelength of two interference filters are located at 353.9 nm and 352.5 nm, respectively, in which wavelength temperature coefficients of rotational Raman spectral are opposite in sign. The preliminary experiments are carried out for verifying the feasibility of the prototype of the ultraviolet RRL, and the results show that the temperature sensitivity of the system is 0.43%/K and the statistical temperature errors of less then 1K are obtained up to a height of 2 km for nighttime with 300 mJ laser energy and observation time of ~8 min.