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土壤同其他地物一样对太阳辐射有着不同的分光反射率.研究不同土壤的光谱反射特性是土壤遥感的一项基础工作,它对发展我国的空间技术,选择土壤遥感的最佳波段是十分必要的.同时,这项研究对应用遥感资料来摸清土地资源,土壤的地理分布和间接判断不同土壤的理化性质也是很有帮助的.一、土壤光谱反射特性的室内外测试在土壤光谱反射特性研究中,国内外采用了室外和室内两种方法.前者能较好的反映自然景观的真实情况;后者是为了研究土壤的某个因子(如土壤中的铁的氧化物或有机质)对土壤光谱反射特性的影响.室外土壤光谱反射特性的研究采用302型野外分光光度计,对长春市净月潭地区的不同土壤进行了测试.室内研究所用仪器是日本制UV—201型双光路分光光度计,共测100条光谱曲线,所采土样均来自东北地区(见表1).
Soil, like other features, has different spectral reflectance to solar radiation.Researching the spectral reflectance of different soils is a basic work of soil remote sensing, which is very necessary for the development of China’s space technology and the selection of the best band for remote sensing of soil At the same time, this study also applied the remote sensing data to find out the land resources, the geographical distribution of soil and indirectly determine the physical and chemical properties of different soils.Second, indoor and outdoor spectral reflectance characteristics of soil spectral reflectance In the study, both indoor and outdoor methods were adopted, the former can better reflect the real situation of the natural landscape; the latter is to study the effect of some factor of the soil (such as iron oxide or organic matter in the soil) Spectral reflectance characteristics of outdoor soil spectral reflectance characteristics of 302 field spectrophotometer, Changchun City, Jingyuetan different soil tested.Inside laboratory equipment used in the Japanese UV-201 dual-beam spectrophotometry Total of 100 spectral curves were measured, the soil samples were from the northeast (see Table 1).