非同温离散体热辐射方向性模拟与验证

非同温离散体热辐射方向性模拟与验证 Simulation and Test of Radiant Directionality of Non-Isothermal Discontinuous Target 陈良富 1 first-author 庄家礼 1 徐希孺 1 张仁华 2 苏红波 2 北京大学遥感与地理信息系统研究所,北京,100873 北京大学遥感与地理信息系统研究所,北京,100873 中国科学院地理科学与资源研究所,北京,100101 中国科学院地理科学与资源研究所,北京,100101 自然界中的离散植被类型是广泛存在的,用离散圆锥体代替单棵树冠,详细说明了用蒙特卡罗方法模拟非同温离散体热辐射方向性规律的过程。模拟结果经室内实验结果对比表明;对较为光滑的目标作朗伯体假设,以及只考虑目标物的直接辐射而忽略多次散射,其模拟结果与实验结果相差稍大。 The discontinuous vegetation canopy widely exists in the world, and the cone has been substituted for discontinuous vegetation canopy in this paper, in order to describe the Monte Carlo method used to simulate the radiant directionality of non-isothermal discontinuous target. Comparing the simulated result with that of indoor experiment, it shows a large difference when the relatively smooth target has been assumed to be Lambertin and only directive radiance of targets has been taken into account while the multi-scattering is ignored. 非同温像元 热辐射方向性 蒙特卡罗方法 non-isothermal pixel radiant directionality Monte Carlo method 10.11834/jrs.2000S108 2021-06-16 S1 4