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水分含量是影响土壤偏振光谱特征的重要参数之一,研究土壤不同水分含量的偏振光谱特征在土壤偏振遥感波段的选择和图像解释上具有重要意义,为应用偏振遥感信息进行土壤调查及理化性质的分析提供依据。本文通过在350—2500 nm波段范围内对不同水分含量的土壤进行偏振光谱测试与分析,研究土壤偏振光谱数据与水分含量之间的关系,建模并检验其精度,对影响土壤偏振光谱特征的各个因素设计科学的正交实验,研究含水量、偏振角度、探测角和方位角等各个因素及其交互作用对土壤偏振光谱特征的影响。结果表明,含水量与偏振角度的交互作用和含水量本身对土壤偏振光谱的影响最大,显著性最强,其次是探测角与含水量的交互作用的影响,而偏振角对土壤偏振光谱有一定的影响,其他因素对土壤光谱偏振反射的影响不大。
Moisture content is one of the important parameters that affect the spectral characteristics of soils. Studying the polarization characteristics of different soil moisture content is of great significance in the selection and image interpretation of the remote-sensing spectral range of soils. In order to investigate the soil properties and physicochemical properties using the remote sensing information Analysis provides the basis. In this paper, the polarization spectra of soils with different moisture contents were tested and analyzed in the range of 350-2500 nm. The relationship between the data of soil polarization and moisture content was studied. The accuracy of the data was modeled and tested. Various factors Design the science of orthogonal experiment to study the moisture content, polarization angle, detection angle and azimuth and other factors and their interaction on the spectral characteristics of soil polarization. The results show that the interaction between water content and polarization angle and the water content itself have the greatest influence on the soil polarization spectrum with the strongest significance, followed by the interaction between the detection angle and water content, while the polarization angle has certain influence on the soil polarization spectrum The other factors have little effect on the polarization of soil spectrum.