用禹城矮杆冬小麦的热辐射方向性实地测量数据,验证LSF非同温表面热辐射方向性概念模型。小麦结构造成的方向比辐射率用辐射传输模型经基尔霍夫定律得到,视在温差引起的方向比辐射率用间隙率模型计算。结果表明LSF概念模型正确描述了非同温像元的热辐射方向性。

In this paper we validated Li-Starhler-Friedl's LSF) conceptual model about directional thermal radiation of non-isothermal surface with field measured data of winter wheat in Yucheng, Shandong Province on May, 1999. The directional-hemisphere reflectance that is made by the canopy structure is calculated with radiation transfer model, thencorresponding directional emissivity is obtained though using Kirchhoff law. The apparent directional emissivity that ismade by the canopy component temperature differences is calculated with geometric-optic model, in this context, gapprobability model is used. we can conclude that the LSF conceptual model is suit to directional thermal emission ofnon-isothermal canopy.