【摘要】：激光雷達回波中的多次散射量決定了衰減系數(shù)KLidar,從而對水體光學(xué)特性參數(shù)的反演產(chǎn)生影響。目前的海洋激光雷達理論中,均以Walker-McLean模型和多次前向-單次后向散射模型的公式形式表示多次散射分量。根據(jù)水下激光傳輸機制,分析了這兩種模型中多次散射因子的等效性,并將其多次散射項進行對比,討論了利用這兩個模型反演水體光學(xué)特性參數(shù)的異同。對比兩種模型的散射相函數(shù)發(fā)現(xiàn),Walker-McLean模型更符合實測情況;多次前向-單次后向散射模型適應(yīng)于前向散射極強的介質(zhì)。在激光剛進入水體時,其水體光學(xué)特征參數(shù)反演值會偏低,并隨著多次散射次數(shù)的增加而變得偏高。
[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.
【作者單位】： 中國科學(xué)院海洋研究所;中國科學(xué)院上海光學(xué)精密機械研究所空間激光信息傳輸與探測技術(shù)重點實驗室;國家海洋局第一海洋研究所;
【基金】：國家自然科學(xué)基金(61505221) 科技重點專項(2016YFC1402602) 中科院項目(YZ201522)
【分類號】：TN958.98

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