| Effect of the reflection of underlying surface on sky radiance distribution |
| |
| 作者姓名： | 杨春平 魏凌 吴健 冷杰 |
| |
| 作者单位： | School of Opto-Electronic Information University of Electronic Science and Technology of China，School of Opto-Electronic Information University of Electronic Science and Technology of China，School of Opto-Electronic Information University of Electronic Science and Technology of China，Institute of Applied Electronics China Academy of Engineering Physics Chengdu 610054，Chengdu 610054，Chengdu 610054，Mianyang 621900 |
| |
| 基金项目： | This work was supported by the National Natural Science Foundation of China under Grant No. 10376007. |
| |
| 摘 要： | Sky radiance might be influenced by the multiple reflectance between the earth's albedo surface and the atmosphere. Based on the Lambert's law and the radiative transfer equation (RTE), a model is developed to calculate the additional sky radiance at wavelengths of 0.4-3μm due to the reflectance contribution of the underlying surface. The iterative method is used to calculate sky radiance without the reflectance from underlying surface. The hybrid modified delta-Eddington approximation is used to compute the atmospheric reflection of the radiation from the earth's surface. An interaction factor is introduced to deal with the multiple reflectance between the atmosphere and the underlying surface. The sky radiance increment is evaluated for some different albedos of the earth's surface. The results show that the sky radiance increment rises rapidly while viewing zenith angle is near to 90°, and the larger the albedo of the earth's surface is, the more obvious this effect appears.
|
| 本文献已被 CNKI 等数据库收录！ |
