红外与毫米波学报2012，Vol.31Issue(6)：556-562,7.DOI:10.3724/SP.J.1010.2012.00556
SAR土壤水分反演中的介电常数实部简化模型
A simplified model of the real part of the soil complex permittivity for soil moisture estimation from SAR image
摘要
Abstract
A simulated database built with the Dobson semi-empirical model was fitted to the Hallikainen formula by the least square regression method. The coefficients at key frequency points of SAR were calibrated with some improvement. The simplified model between the real part of the complex permittivity and the soil volumetric moisture content was established. It was validated and compared with other models. The results show that the simplified model has better accuracy than the Hallikainen empirical model, and also has good accuracy and practicality compared with the complex Dobson semi-empirical model.关键词
介电常数/土壤水分/SAR/简化模型Key words
dielectric constant/soil moisture/SAR/simplified model分类
信息技术与安全科学引用本文复制引用
曾江源,李震,陈权,毕海芸..SAR土壤水分反演中的介电常数实部简化模型[J].红外与毫米波学报,2012,31(6):556-562,7.基金项目
973项目(2010CB951403,2009CB723901) （2010CB951403,2009CB723901）
863项目(2011AA120403) （2011AA120403）
国家自然科学基金(41101391) （41101391）
