论文部分内容阅读
土壤的散射和热辐射特性与土壤表面的粗糙度及含水量密切相关。本文利用基尔霍夫近似条件下的随机粗糙面的散射理论和互易性原理,定量地给出了热发射率与后向散射的对应关系,并得到了它们对于不同湿度和粗糙度形成的网格图。由土壤的热发射率和后向散射系数确定其在网格图上的经纬坐标,它给出了该土壤的湿度和表面粗糙度。利用本文给出的结果,可方便地由主被动遥感的实验数据推断地表的湿度和粗糙度。
The scattering and thermal radiation characteristics of the soil are closely related to the roughness and water content of the soil surface. In this paper, the corresponding relationship between thermal emissivity and backscattering is quantitatively given by using the scattering theory and reciprocity principle of random rough surface under Kirchhoff approximation, and their relationship to the formation of different humidity and roughness Grid chart. The latitude and longitude coordinates on the grid map are determined from the thermal emissivity and backscatter coefficient of the soil, which gives the soil moisture and surface roughness. Using the results presented in this paper, we can easily deduce the surface humidity and roughness from experimental data of active and passive sensing.