基于野外双向反射信息利用反射模型反演土壤含水量研究  

Study on Inverting Soil Moisture Content Based on the Field Bidirectional Reflectance Information with the Reflection Model

作　　者：吕云峰[1] 孙仲秋[2] 赵云升[1] 

机构地区：[1]长春师范大学城市与环境科学学院,吉林长春130032 [2]东北师范大学地理科学学院,吉林长春130024

出　　处：《光学学报》2015年第3期344-350,共7页Acta Optica Sinica

基　　金：国家自然科学基金(41201343;41401379);吉林省科技厅自然科学基金(20140101212JC)

摘　　要：为了分析土壤含水量对双向反射的影响以及反演土壤含水量,研究了基于野外实测多角度高光谱数据,获取了双向反射模型的参数,并且通过模型计算值反演土壤含水量。通过分析在3个波段以及不同角度反演的模型参数与含水量之间的关系,发现在不同角度利用模型反演土壤含水量的结果具有差异性;并且在865 nm处反演精度最稳定。这表明利用双向反射分布特性能够以较高的精度反演土壤含水量,同时也应该考虑方向反射对反演精度的影响。In order to invert the soil moisture content and analyze the influence of soil moisture content on the bidirectional reflectance, the parameters of bidirectional reflectance model are obtained based on the multi-angle hyper spectral data in the field, and the soil moisture content using the calculated values is inverted. The relationship between model parameters in three wavelengths and different directions and moisture content is analized, the differences of inverting soil moisture content results based on model in different directions are found, and the inverting accuracy is stablest at 865 nm. The result suggests that based on the bidirectional reflectance distribution characteristics, the soil moisture content can be inverted with high accuracy. At the same time, the effect of the directional reflectance on the inversion accuracy should also be considered.

关 键 词：遥感 土壤 含水量 双向反射特性 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]