Scene Radiation Model Based on Four-Stream Radiative Transfer Theory

摘要

A simple analytical four-stream radiative transfer model based on Suits's differential equations is applied to the atmosphere-earth system in order to investigate the effects of the atmosphere and the view angle on remotely sensed multispectral radiance data from vegetation canopies. The scene radiation model is composed of two atmospheric layers and one vegetation layer resting on a Lambertian soil, which are combined by the Adding method. Input data for the model are Elterman's data on atmospheric optical depths, Deirmendjian's phase functions for atmospheric haze, visibility, directions of the sun and of observation, and canopy parameters of the SAIL vegetation reflectance model, such as LAI and the leaf angle distribution.