双扫描激光雷达精细探测低层大气气溶胶方法
发布时间：2018-07-18 21:45
【摘要】：为实现水平非均匀分布的低层大气气溶胶光学特性的遥感探测,提出一种基于双扫描激光雷达的气溶胶精细探测方法.该方法以扫描激光雷达为遥感探测工具,通过双激光雷达相向交叉扫描工作模式,实现对同一空域近地表气溶胶全视野剖面的交叉探测,从而提供双激光雷达方程组以精确求解气溶胶消光和后向散射系数.在数据反演过程中,通过对交叉扫描区域进行坐标化和网格化处理、网格像素单元的初值预设,以及双扫描激光雷达方程组的数值逼近反演得到气溶胶消光.利用长距离扫描激光雷达的数据对该方法进行验证,结果表明,该方法与多角度方法反演所得到的结果随高度变化的趋势具有高度的一致性;同时双扫描激光雷达可提供交叉扫描区域剖面的气溶胶浓度分布,相比于单条廓线具有较大的优势.
[Abstract]:In order to detect the optical properties of aerosols in the lower atmosphere with horizontal non-uniform distribution, a method of fine aerosol detection based on dual-scanning lidar is proposed. In this method, scanning lidar is used as a remote sensing detection tool, and the cross detection of aerosol full field profile near the ground surface in the same airspace is realized by using dual laser radar phase cross scanning mode. In order to solve the aerosol extinction and backscattering coefficient accurately, the double lidar equations are provided. In the process of data inversion, aerosol extinction can be obtained by coordinate and grid processing of cross scanning region, initial value presupposition of grid pixel unit and numerical approximation inversion of double scanning lidar equations. The method is verified by the data of long range scanning lidar. The results show that the results obtained by this method are consistent with the trend of height change. At the same time, dual scanning lidar can provide aerosol concentration distribution in cross-scanned area profile, which is superior to single profile.
【作者单位】： 西安理工大学机械与精密仪器工程学院;
【基金】：国家自然科学基金(Nos.41627807,41305023,41775035) 中国博士后基金(No.2014M560799) 陕西省自然科学基金(Nos.2014JQ5174;2014KJXX-64)资助~~
【分类号】：TN958.98
，
本文编号：2132869
[Abstract]:In order to detect the optical properties of aerosols in the lower atmosphere with horizontal non-uniform distribution, a method of fine aerosol detection based on dual-scanning lidar is proposed. In this method, scanning lidar is used as a remote sensing detection tool, and the cross detection of aerosol full field profile near the ground surface in the same airspace is realized by using dual laser radar phase cross scanning mode. In order to solve the aerosol extinction and backscattering coefficient accurately, the double lidar equations are provided. In the process of data inversion, aerosol extinction can be obtained by coordinate and grid processing of cross scanning region, initial value presupposition of grid pixel unit and numerical approximation inversion of double scanning lidar equations. The method is verified by the data of long range scanning lidar. The results show that the results obtained by this method are consistent with the trend of height change. At the same time, dual scanning lidar can provide aerosol concentration distribution in cross-scanned area profile, which is superior to single profile.
【作者单位】： 西安理工大学机械与精密仪器工程学院;
【基金】：国家自然科学基金(Nos.41627807,41305023,41775035) 中国博士后基金(No.2014M560799) 陕西省自然科学基金(Nos.2014JQ5174;2014KJXX-64)资助~~
【分类号】：TN958.98
，
本文编号：2132869
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