基于微波干涉技术的土壤介电特性测量  

Soil dielectric characteristic determination based on microwave interferometry theory

作　　者：马红章[1,2] 柳钦火[2] 王合顺[2] 肖青[2] 

机构地区：[1]中国石油大学(华东)理学院,青岛266555 [2]中国科学院遥感应用研究所遥感科学国家重点实验室,北京100101

出　　处：《农业工程学报》2011年第9期159-163,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金重点项目(40730525);国家重点基础研究计划项目(973计划)(2007CB714401)

摘　　要：土壤介电特性的测量对研究土壤品质与性质尤其是研究土壤水分至关重要,在土壤微波地基遥感试验中,土壤介电特性的测量也是必不可少的。该文利用C波段微波辐射计成功获取了8组不同湿度土壤的微波辐射干涉数据,在分析干涉原理的基础上,提出了基于土壤干涉数据的土壤介电常数的计算方法。通过干涉计算得到的土壤介电常数与DOBSON模型计算结果非常接近。土壤介电常数的干涉测量方法为土壤介电特性测量提供了一种选择。The measurement of the soil dielectric properties is very important for researching the soil character and soil moisture. In the ground test of microwave remote sensing, the measurement of soil dielectric properties is the indispensable part. The soil microwave radiation interference data of different soil moisture content was measured successfully by using C band microwave radiometer. On the basis of interference principle analysis, a calculation method of soil dielectric constant was proposed by using the soil microwave radiation interference data. The soil dielectric constant accounted by means of interference method was very similar to the result computed by DOBSON model. In the process of the soil microwave radiation field trials, the interference measuring method can be taken as an optional method to measure the soil dielectric constant.

关 键 词：微波干涉 DOBSON模型 土壤水分 介电常数 

分 类 号：P237[天文地球—摄影测量与遥感] TP79[天文地球—测绘科学与技术]