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该文用几何光学与辐射传输混合模型研究不连续植被冠层的几何光学反射模型的四分量（承照树冠、承照地面、阴影树冠、阴影地面）的参数化。用一个修正的均匀介质层路径散射（反射与传输）参数的解析算法估计路径散射参数（反射与传输），其中也考虑了冠层间隙的影响。光谱分量特征是不连续植被冠层的传输与反射，背景反照率，以直射光通量与天空漫射光通量比例的函数。光谱分量特征的模型与在美国缅因州Ｈｏｌａｎｄ采集的针叶林数据吻合。基于ＬｉＳｔｒａｈｌｅｒ几何光学相互遮蔽模型，用参数化的光谱分量特征对老松林和老云杉林的方向反射进行估计，其结果与在不同太阳与观测方向上的ＰＡＲＡＢＯＬＡ测量值匹配得很好。
In this paper, we use the hybrid model of geometrical optics and radiative transfer to study the parameterization of the four components of the geometric optical reflection model of discontinuous canopy (canopy, ground, shadow canopy, shadow ground). A modified analytic algorithm for the scattering (reflection and transmission) parameters of the uniform dielectric path estimates the path scattering parameters (reflection and transmission), which also take into account the effect of the canopy gap. Spectral component characteristics are the transmission and reflection of discontinuity canopy, the background albedo, and the ratio of direct flux to sky diffuse flux. The spectral component characteristics of the model coincide with the coniferous forest data collected in Holand, Maine, USA. Based on LiStrahler geometric optics mutual occlusion model, the directional spectral reflectance of old pine and old spruce forest was estimated with parametric spectral components, and the results were well matched with PARABOLA measurements in different solar and observational directions.