地表热辐射方向性研究进展

地表热辐射方向性是基于多角度热红外遥感数据反演组分温度的基本问题 ,论文分析了国内外近来从等效比辐射率和热辐射模型两个角度研究非同温热辐射方向性所取得的进展和存在的问题 ,并指出今后应继续基本概念的探讨 ,加强遥感基础实验和热辐射理论模型简化和验证工作 ,进一步探讨基于热红外多角度遥感数据反演组分温度的新方法。

The Study on Thermal Infrared Radiant Directionality of Non isothermal Land Surface

The angular effects of emitted radiation from non isothermal land surface are the basis for component temperatures retrieval from multi angle thermal infrared remote sensing data. This paper reviews two different directions in the studies of this field. One is to define new concepts of emissivity, for example, the "e emissivity", "r emissivity", the band averaged emissivity, and "canopy emissivity" et al. Some of the them are component temperatures dependent. Another is to build thermal radiant model to illustrate the emitted radiation from non isothermal mixed pixel. This paper then shows the recent progress of this field in China. It also points out in final section that several trends should be strengthened, such as the basic theories and concept, the remote sensing field measurement, the simplification and test of radiant model, and algorithms of component temperatures retrieval from multi angle data of thermal infrared remote sensing.