土壤热红外辐射及其偏振辐射特性影响因素分析

针对目前地面目标热红外通道辐射特性及其偏振辐射特性的遥感探测需求，将五大典型地面目标之一——土壤作为研究对象，并利用地物热红外多角度偏振遥感测量平台及仪器获取了不同因素影响下的土壤热红外多角度热辐射与偏振辐射数据。分别从探测角、方位角、波段、偏振角和土壤类型五个方面研究了土壤的热辐射特性及其偏振辐射特性。结果表明，当入射光源固定时，土壤的辐射亮度和亮度温度均随探测角的增大而增大；当方位角为180°时，二者均达到最大值；它们随波段变化呈现不同的规律；偏振角以及土壤类型对辐射亮度的影响不显著，而对亮度温度的影响显著。该研究成果可以为开展热红外土壤遥感应用提供新的思路与方法，并可为热红外遥感和偏振遥感的进一步发展提供重要的理论支撑。

Analysis of Influence Factors of Soil Thermal Infrared and Polarized Radiation Characteristics

Aiming at ground targets thermal infrared and polarization radiation characteristics of remote sensing detection requirements, soil is taken as the research object which is one of the five typical ground targets in this paper. The ground object thermal infrared multi-angle polarization remote sensing measurement platform and instrument are used to obtain the thermal infrared multi-angle thermal radiation and polarization radiation data of soil under the influence of different factors. In addition, the characteristics of soil thermal and polarization radiation are studied from five aspects of detection angle, azimuth angle, wave band, polarization angle and soil type. The results show that when the incident light source is fixed, the radiance and brightness temperature of the soil increase with the increase of detection angle. When the azimuth angle is 180°, both of them reach the maximum value. And they show different laws with the change of wave band. The influence of polarization angle and soil type on radiance is not significant, but the influence on brightness temperature is significant. The research results can provide new ideas and methods for the application of thermal infrared soil remote sensing, and provide important theoretical support for the further development of thermal infrared and polarization remote sensing.