激光海表面散射特性及海洋次表层光学参数的激光遥感研究

项目名称： 激光海表面散射特性及海洋次表层光学参数的激光遥感研究

项目编号： No.41206003

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 海洋科学

项目作者： 李志刚

作者单位： 鲁东大学

项目金额： 26万元

中文摘要： 机载、星载大气激光雷达可以同时获取大气、地面、海面以及水下散射信号，因此进行激光海表面及次表层的相关研究，对于了解激光在海表面的散射特性及其在海洋激光雷达探测中的应用具有重要的意义。本项目首先针对激光的海表面散射的强度特性和多普勒特性开展仿真分析研究，并利用激光雷达机载实验数据开展数据分析，验证受海表面风驱动的激光海表面反射率特征，完善海表面反射率模型，仿真分析偏离天底角测量方向的海表面运动带来的径向速度影响，提出多普勒激光雷达海表面零风速校准方法；其次结合高光谱分辨率多普勒激光雷达大气探测的应用基础，将其拓展到海洋探测应用的新领域，利用碘分子吸收滤波器的高光谱分辨率特性分离测量水分子散射和海中悬浮物散射，反演海洋次表层的海洋光学参数参数。该项目的研究能够为计划上星的激光雷达系统提供完善的海表面散射校准算法及海洋次表层激光探测新方法。

中文关键词： 机载激光雷达；海表面反射率；零风速校准；海洋光学参数；

英文摘要： The atmosphere, ground, sea surface and underwater backscattering signal could be obtained simultaneously by airborne and spaceborne lidar, so it is significant to do the research on the laser sea surface and subsurface backscattering for the understanding of the sea surface backscattering properties and the ocean detection application. The characteristics of sea surface backscattering including the amplitude and Doppler properties was simulated and analyzed, and the experimental data from airborne wind lidar was used for the validation of wind-derived sea surface backscattering properties. The sea surface movement will be simulated and Doppler shift from sea surface will also be analyzed, and the calibration method of zero-wind will be studied. Secondly, the High Spectrum Resolution Lidar for atmospheric wind detection are extended to the field of ocean optical detection. The backscattering signal from water molecules and suspended particles will be separated by the iodine filter used for atmosphere Doppler discrimination. In this way, the ocean optical parameters of water backscattering coefficient and extinction coefficient could be retrieved. The studies on the laser sea surface backscattering calibration algorithm and subsurface detection with new method are significant and needed for the future spaceborne

英文关键词： airborne lidar；sea surface reflectance；zero-wind calibration；ocean optical parameters；