We propose a simple and fast cloud retrieval technique based on the spectral diffuse transmittance measurements under optically thick clouds. The technique is aimed at retrieval of cloud optical thickness, liquid water path and effective radius of particles in cloudy media. It is based on the asymptotic radiative transfer solutions valid at cloud optical thicknesses above 10. Also we use the parametrizations of the Mie theory results for local optical properties of clouds such as the single scattering albedo, extinction coefficient, and asymmetry parameter. This makes it possible to reduce the inverse problem solution to finding a root of a simple transcendent equation.

中文翻译：

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基于光学厚云层条件下光谱太阳光漫透射率测量的云特性检索

我们提出了一种基于光学厚云下光谱漫透射率测量的简单快速的云检索技术。该技术旨在检索云介质中的云光学厚度，液态水路径和有效粒子半径。它基于在大于10的云光学厚度时有效的渐近辐射转移解。此外，我们对云的局部光学特性（例如单个散射反照率，消光系数和不对称参数）使用Mie理论结果的参数化。这使得可以减少反问题解决方案以找到简单的超越方程的根。