MonteCarlo方法在可见光遥感中被广泛用于植被冠层的BRDF模拟。论述如何应用蒙特卡罗方法模拟连续植被冠层的热辐射方向性, 并用野外实验观测数据对模拟结果进行验证对比。

Monte Carlo method has been widely used to simulate t he BRDF value of vegetation canopy in the field of visible remote sensing. This paper discusses how to use Monte Carlo method to simulate the thermal radiant di rectionality of the continuous vegetation. Based on two preconditions: the loca l thermal equilibrium is satisfied and emissivities do not change with temperatu re, the component effective emissivities of winter wheat and soil had been calcu lated by Monte Carlo method which can describe the transfer process of photon. Then the radiance L(θ) of non-isothermal mixed pixel can be calculated acco rding the following model:L(θ)=ε_e1(θ)·L b(T₁)+ε_e2(θ)·L_b(T₂)The simulated result were well proved by measured radiance in the field of Yuche ng Station of CAS in Shandong province.