寒区植被对冻土微波辐射影响的研究

被引:2
作者
郑越 [1 ,2 ]
张立新 [1 ,2 ]
邢伟坡 [1 ,2 ]
张钟军 [1 ,3 ]
机构
[1] 北京师范大学遥感与GIS研究中心
[2] 北京师范大学地理学与遥感科学学院
[3] 北京师范大学信息科学与技术学院
基金
高等学校博士学科点专项科研基金;
关键词
寒区; 冻土; 植被; 耦合矩阵; 微波辐射;
D O I
暂无
中图分类号
P642.14 [冻土学];
学科分类号
070501 ;
摘要
理论和实验表明,微波辐射可以用来研究冻土的特性.但当冻土的上层被植被层覆盖时,植被吸收、发射并散射微波信号,冻土的微波辐射特征就会被改变.所以,研究植被层对冻土微波辐射特征的影响,对于准确获取下层冻土的微波辐射特性及冻土的变化监测极为重要.介绍了一种基于光线跟踪原理和耦合矩阵算法的微波辐射模型,用来计算植被层的发射率,可以计算得到视场内来自不同观测角度的整体发射率,以及V和H极化的相位差.根据车载双极化微波辐射计在C,X,K,Ka等4个波段的实测数据与模拟结果的比较,分别计算出来自植被层和冻土层的辐射,从而研究寒区植被对冻土的微波辐射影响.
引用
收藏
页码:214 / 219
页数:6
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