土壤偏振反射特性的多角度测量与研究

The Polarized Reflectance Characteristics of Some Soils

应用二向反射光度计实测了部分典型土壤在干燥与一定含水量状态下的偏振反射数据,并以黑土为例测试了其在不同含水量情况下的偏振反射数据,从探测方位角、光线入射天顶角、探测天顶角、偏振角、波段等方面对所测土壤的偏振反射数据进行了初步分析与研究,这不仅对土壤物理性质的测试做出了新尝试,而且对偏振光遥感的深入研究具有一定的理论与实践意义。

Polarized reflectance data of different dry soils under certain water content were collected with a bi-directional reflectance detection instrument. The specialties of this instrument lie in its ability to measure the polarized reflectance of targets at various zenith viewing angles, incidence light zenith angles and azimuth angles with band A (630-690nm) and band B (760-1100nm). Hence, analysis according those characteristics listed above was done. It was found that soil polarized reflectance characteristics have direct relation with soil water content,soil property and sensor's viewing geometry. This study on polarized reflectance of soil not only helps to find a new way for soil moisture detection remotely,but also provides a theoretical basis for further research on the polarized light remote sensing.