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遥感技术与应用  2011, Vol. 26 Issue (3): 263-269    DOI: 10.11873/j.issn.1004-0323.2011.3.263
微波遥感     
一种寒冷环境下分析幼林对地表微波辐射信号影响的方法
张钟军1,2,张立新2 ,杨立娟1,刘嘉敏1
(1.北京师范大学信息科学与技术学院,北京100875;2.遥感科学国家重点实验室,北京100875)
Understanding the Young Stand Effects on Soil Surface Microwave Radiation Signal at Frozen Environment
ZHANG Zhong-jun1,2,ZHANG Li-xin2,YANG Li-juan1,LIU Jia-min1
(1.College of Information Science and Technology,Beijing Normal University,Beijing 100875,China;2.State Key Laboratory of Remote Sensing Science,Beijing 100875,China)
 全文: PDF(1879 KB)  
摘要:

通过拓展冻土介电常数模型、寒冷环境植被介电常数模型,将Matrix-Doubling算法发展为适用于寒冷环境的幼林微波辐射模型。然后利用该模型模拟寒冷环境下幼林在Ku(18.7 GHz)、Ka(36.5 GHz)波段上的亮度温度并与车载微波辐射计获得的实测亮度温度对比,进行模型验证。最后,用发展后的Matrix\|Doubling模型模拟的结果和相同环境下ω-τ模型的结果进行匹配,反演出幼林在Ku、Ka波段上的等效单散射反照率和光学厚度,为用微波遥感监测地表冻融过程中去除植被对地表微波辐射的影响提供了一种有效方法。

关键词: 微波辐射信号双矩阵寒冷环境幼林    
Abstract:

The presence of young stand cover alters the signatures that directly come from bare frozen soil surface.Matrix\|Doubling model is a complex passive microwave model to simulate the radiative transfer and attenuation properties of vegetation covers.In this paper,the Matrix-Doubling model is revised so that it can be used at frozen environment.The simulation results are then compared with experimental results obtained at Ku and Ka band by a truck-mounted dual-polarization microwave radiometer.In the end,the complex model (M-D model) was matched with the simple model (τ-ω model) under the same environment.In this way,the young stand effects on soil surface microwave radiation signal are eliminated.
 

Key words: Microwave radiation signal    Matrix-Doubling    Frozen environment    Young stand
收稿日期: 2010-06-21 出版日期: 2013-01-23
:  TP 722.6  
基金资助:

科技部公益性行业(气象)科研专项经费(GYHY(QX)2007-6-44),国家自然科学基金项目(40730525),遥感科学国家重点实验室开放基金项目(2009KFJJ008) 资助。

作者简介: 张钟军(1968- ),男,博士,副教授,主要从事微波遥感、信号处理研究。Email:zzj@bnu.edu.cn。
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引用本文:

张钟军,张立新,杨立娟,刘嘉敏. 一种寒冷环境下分析幼林对地表微波辐射信号影响的方法[J]. 遥感技术与应用, 2011, 26(3): 263-269.

ZHANG Zhong-jun,ZHANG Li-xin,YANG Li-juan,LIU Jia-min. Understanding the Young Stand Effects on Soil Surface Microwave Radiation Signal at Frozen Environment. Remote Sensing Technology and Application, 2011, 26(3): 263-269.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2011.3.263        http://www.rsta.ac.cn/CN/Y2011/V26/I3/263

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