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水体光场的非朗伯特性（二向性）是目前水色反演算法中的误差因素之一．随着新一代高精度水色遥感器的发射，原来的许多次要因素已变得不可忽略．为研究水体光场的非朗伯特性，首先建立了一个三维ＭｏｎｔｅＣａｒｌｏ海洋光学模型，并利用国际上提出的７个海洋光学标准问题中的４个对模型的正确性进行了检验；在此基础上，模拟了不同太阳天顶角、体成分等参数对离水辐射率的方向特性的影响．模拟结果表明，在一定的遥感器－太阳－像元几何条件下，同一水体的光场二向性带来的离水辐射率变化可能大于已有的业务化水色大气修正算法反演高水辐射率的误差．模拟结果对水色遥感中正确进行现场数据获取及遥感与地面数据比对有一定的意义．
The non-Lambertian nature of the light field in a water body is one of the error factors in the aqua inversion algorithm. With the launching of a new generation of high-precision color remote sensors, many of the original secondary factors have become negligible. To study the non-Lambertian properties of a light field in a water body, a three-dimensional Monte Carlo ocean optical model was first established and the correctness of the model was verified by using four of the seven marine optical standards proposed internationally. Based on this, The effects of different solar zenith angles, body composition and other parameters on the directional characteristics of water emissivity were simulated. The simulation results show that the change of emissivity from the same water body under a certain remote sensor-solar-cell geometry may be greater than the existing operational aqua-atmosphere correction algorithm to retrieve high water radiation Rate error. The simulation results have certain significance for correctly acquiring field data and comparing remote sensing with ground data in aqua remote sensing.