摘要
该文基于蒙特卡洛光线追踪技术评价一个新的三维不均匀介质的辐射传输模型，这一模型是按一个虚拟实验室来构思的。在这个实验室中可以把多个物体分别表征，并可以显示控制辐射场与这些物体的相互作用。对于任意复杂的三维物体，此模型都可以用来产生反射及吸收的纵剖面图，例如一片植物的叶子或是一个完整的森林冠层。通过对一个人造物体的模型仿真及实验测量结果的比较，我们评估了这一模型的性能。空间应用研究所的高技术利用室利用欧洲测角计（ＥＧＯ）设备进行了观测，与实验室的测量比较表明我们的模型可以再生一个与实际相符合的物体的实际观测反射因子，甚至可以表征实验室的性能。
This paper focuses on the evaluation of a new model of radiation transfer in heterogeneous threedimensional media, based on the Monte Carlo ray tracing technique. This model is conceived as a virtual laboratory, where the targets can be individually characterized, and where the interactions between the radiation field and these targets can be explicitly controlled. The model can be used to generate reflectances as well as absorption profiles for arbitrarily complex threedimensional targets, such as an individual plant leaf or a complete forest canopy. The model performance is evaluated by comparing model simulations with laboratory measurements obtained over an artificial target. Observations have been carried out by the Advanced Techniques unit of the Space Applications Institute in the European goniometer (EGO) facility. Comparisons with laboratory measurements demonstrate the capability of our model to reproduce the actual observed reflectance factors of a fully documented target, and even to characterize the performance of this laboratory.
出处
《遥感学报》
EI
CSCD
1997年第S1期139-144,共6页
NATIONAL REMOTE SENSING BULLETIN
关键词
蒙特卡洛
光线追踪
测角计测量
辐射传输建模
Monte Carlo, Ray tracing, Goniometer measurements, Radiative’transfer modeling
