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土壤水分是气象预报、农情监测及水文模型的重要参数之一,利用被动微波遥感技术可以有效获取土壤水分。本文分析被动微波遥感反演土壤水分的国内外研究现状,在前人相关理论与方法的研究基础之上,基于土壤的微波辐射特性,通过双波段(C、Ku)微波辐射计对不同水分、不同表面粗糙度的土壤微波辐射特性进行了试验研究,分析土壤湿度与微波发射率、土壤粗糙度与微波遥感指数之间的定量关系,并建立了土壤湿度与微波发射率、粗糙度与微波遥感指数间的经验模型。
Soil moisture is one of the important parameters in meteorological forecast, agro-ecosystem monitoring and hydrological model. The use of passive microwave remote sensing technology can effectively obtain soil moisture. Based on the research of related theories and methods, based on the characteristics of microwave radiation of soil, this paper analyzes the research status of passive microwave remote sensing of soil moisture at home and abroad, Different surface roughness of soil microwave radiation characteristics of the experimental study of soil moisture and microwave emissivity, soil roughness and microwave remote sensing index quantitative relationship between soil moisture and microwave emissivity, roughness and microwave remote sensing Empirical model of the index.