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遥感技术与应用  2009, Vol. 24 Issue (1): 1-12    DOI: 10.11873/j.issn.1004-0323.2009.1.1
技术方法     
干涉式被动微波成像技术
吴季,刘浩,阎敬业,孙伟英,张成,潘碑
(中国科学院空间科学与应用研究中心|北京〓100190)
Interferometric Imaging Technology forPassive Microwave Radiometry
WU Ji,LIU Hao,YAN Jing-ye,SUN Wei-ying,ZHANG Cheng,PAN Bei
(Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100190,China)
 全文: PDF(3037 KB)  
摘要:

近年来,大气、海洋和陆地土壤水分遥感的应用对被动微波遥感器的空间分辨率提出了越来越高的要求。但是传统的微波辐射成像技术在分辨率达到一定高度时,由于波束在每个分辨像元的驻留时间越来越短,以致对辐射亮温的测量分辨率产生了影响,这就使得采用传统扫描成像技术来提高空间分辨率的技术路径成为不可能。文章较为详细地综述了近年来发展起来的一种新的微波辐射成像技术——干涉式被动微波成像技术(或称为综合孔径微波辐射成像技术)。在阐述其原理时,采用了新颖的切入点,从被观测目标的空间频谱特征和如何对其进行采样入手,试图从另一个角度揭示干涉式辐射成像技术的基本原理,并使其更加系统化。在介绍实际的成像系统时,将重点放在二维成像系统上,其中时钟扫描成像方式和伪极网格图像反演方法是作者最新的研究成果。

关键词: 干涉式成像被动微波遥感成像技术    
Abstract:

Recently,applications from atmosphere,ocean and land soil moisture have required higher and higher spatial resolution for passive microwave remote sensors.However,if we use the conventional technology,once the spatial resolution reaches a certain level,the small resolution cell will limit the sensitivity of the brightness temperature measurement due to very short integration time at each of the cell.In this paper,a new technology,so called interferometric radiometry or synthetic aperture radiometry,is summarized.While the basic principle is introduced,the authors tried to explain it in a different way from the point of view that every target or distributed scene has characters in their frequency domain pictures.What the new technology does is,in fact,not to measure the scene in its original spatial domain but to measure it in its frequency domain by a sampling device called two-element interferometer.From this point of view,the new technology appears more systematic and clear to understand.While the imaging systems are summarized,the authors emphasize more on the 2-D clock rotation sampling system with associated image retrieval algorithm,called the Pseudo Polar Grid Method,which both were developed by the authors.

Key words: Interfereometry    Passive microwave remote sensing    Imaging technology
收稿日期: 2008-10-05 出版日期: 2009-07-29
:  TP 722.6  
作者简介: 吴季(1958-)|男|博士|研究员|主要从事微波遥感以及空间探测方面的研究。E-mail:wuji@cssar.ac.cn。
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引用本文:

吴季,刘浩,阎敬业,孙伟英,张成,潘碑. 干涉式被动微波成像技术[J]. 遥感技术与应用, 2009, 24(1): 1-12.

WU Ji,LIU Hao,YAN Jing-ye,SUN Wei-ying,ZHANG Cheng,PAN Bei. Interferometric Imaging Technology forPassive Microwave Radiometry. Remote Sensing Technology and Application, 2009, 24(1): 1-12.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2009.1.1        http://www.rsta.ac.cn/CN/Y2009/V24/I1/1

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