用于大气温度廓线测量的瑞利-拉曼激光雷达

Rayleigh-Raman lidar used for atmospheric temperature profile measurement

大气温度廓线及其时间演变特征资料在地球科学领域具有重要的应用,为获取高时空分辨的大气温度的垂直分布,建立了瑞利-拉曼温度测量激光雷达。介绍了瑞利-拉曼激光雷达进行温度测量的主要原理和研制的瑞利-拉曼激光雷达的主要参数;数据处理方面,通过背景噪声剔除和小波算法降噪提高系统的信噪比;使用研制的激光雷达对大气温度廓线进行观测,将观测结果与大气模式数据和卫星观测结果进行对比,均显示较好的一致性,证明了激光雷达温度测量结果的准确性,其温度测量数据可以用于气象学研究。

The atmospheric temperature profile and its time-dependent variation have many applications in geophysical re- search area, thus a Rayleigh-Raman temperature lidar was constructed to obtain atmospheric temperature profiles with high spatial and temporal resolution. This paper, introduces the temperature measurement principle and the key parameters of the Rayleigh- Raman lidar. In terms of the temperature inversion algorithms, background noise subtraction and the wavelet denoising algorithm are used to enhance the signal to noise ratio. Comparisons between the measurement of our lidar and atmospheric data model, sat- ellite measurements are conducted, respectively. The results show good agreements and verify the accuracy of the lidar system, which means the lidar measurement can be used in the meteorological research areas.