海洋激光雷达水体光学特性参数反演模型对比及分析
发布时间：2018-08-22 10:45
【摘要】：激光雷达回波中的多次散射量决定了衰减系数KLidar,从而对水体光学特性参数的反演产生影响。目前的海洋激光雷达理论中,均以Walker-McLean模型和多次前向-单次后向散射模型的公式形式表示多次散射分量。根据水下激光传输机制,分析了这两种模型中多次散射因子的等效性,并将其多次散射项进行对比,讨论了利用这两个模型反演水体光学特性参数的异同。对比两种模型的散射相函数发现,Walker-McLean模型更符合实测情况;多次前向-单次后向散射模型适应于前向散射极强的介质。在激光刚进入水体时,其水体光学特征参数反演值会偏低,并随着多次散射次数的增加而变得偏高。
[Abstract]:The attenuation coefficient KLidar is determined by the amount of multiple scattering in the laser radar echo, which has an effect on the inversion of the optical characteristic parameters of the water body. In the present ocean lidar theory, the multiple scattering components are expressed in the form of Walker-McLean model and multiple forward-single backward scattering model. According to the mechanism of underwater laser propagation, the equivalence of multiple scattering factors in these two models is analyzed, and their multiple scattering terms are compared, and the similarities and differences between the two models in retrieving the optical characteristic parameters of water body are discussed. By comparing the scattering phase function of the two models, it is found that the Walker-McLean model is more suitable for the measured results, and the multiple forward-single backscattering model is suitable for the medium with strong forward scattering. When the laser enters the water body, the inversion value of the optical characteristic parameters of the water body will be lower and become higher with the increase of multiple scattering times.
【作者单位】： 中国科学院海洋研究所;中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室;国家海洋局第一海洋研究所;
【基金】：国家自然科学基金(61505221) 科技重点专项(2016YFC1402602) 中科院项目(YZ201522)
【分类号】：TN958.98
本文编号：2196860
[Abstract]:The attenuation coefficient KLidar is determined by the amount of multiple scattering in the laser radar echo, which has an effect on the inversion of the optical characteristic parameters of the water body. In the present ocean lidar theory, the multiple scattering components are expressed in the form of Walker-McLean model and multiple forward-single backward scattering model. According to the mechanism of underwater laser propagation, the equivalence of multiple scattering factors in these two models is analyzed, and their multiple scattering terms are compared, and the similarities and differences between the two models in retrieving the optical characteristic parameters of water body are discussed. By comparing the scattering phase function of the two models, it is found that the Walker-McLean model is more suitable for the measured results, and the multiple forward-single backscattering model is suitable for the medium with strong forward scattering. When the laser enters the water body, the inversion value of the optical characteristic parameters of the water body will be lower and become higher with the increase of multiple scattering times.
【作者单位】： 中国科学院海洋研究所;中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室;国家海洋局第一海洋研究所;
【基金】：国家自然科学基金(61505221) 科技重点专项(2016YFC1402602) 中科院项目(YZ201522)
【分类号】：TN958.98
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1 刘施菲;激光雷达辅助的惯性导航组合系统技术研究[D];哈尔滨工程大学;2015年
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