Combined Raman lidar for the measurement of atmospheric temperature, water vapor, particle extinction coefficient, and particle backscatter coefficient.
Combined Raman lidar for the measurement of atmospheric temperature, water vapor, particle extinction coefficient, and particle backscatter coefficient.
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DOI：
10.1364/ao.41.007657
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发表时间：
2002-12
期刊：
影响因子：
1.9
通讯作者：
A. Behrendt;Takuji Nakamura;Michitaka Onishi;R. Baumgart;T. Tsuda
中科院分区：
文献类型：
--
作者：
A. Behrendt;Takuji Nakamura;Michitaka Onishi;R. Baumgart;T. Tsuda
空间和大气无线电科学中心(RASC，日本京都)的激光雷达利用两个纯旋转拉曼(MR)信号来测量大气温度分布和推导与温度无关的拉曼参考信号。后一种技术是一种新技术，与常用的振动拉曼激光雷达技术相比，测量不确定度显著减小。为了同时测量温度、粒子消光系数、粒子后向散射系数和湿度，只需要四个激光雷达信号：弹性卡班后向散射信号、两个RR信号和振动拉曼水汽信号。RASC激光雷达提供了前所未有的强RR信号。虽然只有25%的RR信号强度可以用于目前的数据采集电子设备，但夜间温度测量的1-S统计不确定度比以前的系统要低，例如，对于500米9分钟的分辨率，1K高达11公里。此外，白天的RR测量也变得可行。
The lidar of the Radio Science Center for Space and Atmosphere (RASC; Kyoto, Japan) make use of two pure rotational Raman (MR) signals for both the measurement of the atmospheric temperature profile and the derivation of a temperature-independent Raman reference signal. The latter technique is new and leads to significant smaller measurement uncertainties compared with the commonly used vibrational Raman lidar technique. For the measurement of temperature, particle extinction coefficient, particle backscatter coefficient, and humidity simultaneously, only four lidar signal are needed the elastic Cabannes backscatter signal, two RR signals, and the vibrational Raman water vapor signal. The RASC lidar provides RR signals of unprecedented intensity. Although only 25% of the RR signal intensities can be used with the present data-acquisition electronics, the 1-s -statistical uncertainty of nighttime temperature measurements is lower than for previous systems and is < 1K up to 11-km height for, e.g., a resolution of 500 m and 9 min. In addition, RR measurements in daytime also have become feasible.