Imaging algorithm for synthetic aperture interferometric radiometer in near field

	Imaging algorithm for synthetic aperture interferometric radiometer in near field
	Zhang Cheng; Wu Ji; Liu Hao; Yan JingYe
刊名	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2011
卷号	54 期号:8 页码:2224-2231
关键词	synthetic aperture interferometric radiomter (SAIR) near field imaging numerical method pseudo inversion
ISSN号	1674-7321
通讯作者	Zhang, C (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Key Lab Microwave Remote Sensing, CAS, Beijing 100190, Peoples R China.
中文摘要	With the benefits of digital IC technology development, the synthetic aperture interferometric radiometer (SAIR) technique is growing fast and expanding to more and more application areas. The near field imaging detection is a potential application which has received increasing demand recently. Because the Fourier imaging theory of the traditional SAIR is based on far-field approximation, it will be invalid for near-field condition. This paper is devoted to establishing a new accurate imaging algorithm for near-field SAIR imaging. Firstly, the visibility function in near field is deduced and the relationship of which to far-field visibility function is analyzed. Then, a numerical method based on pseudo inverse and focal plane approximation is developed. The effectivity of this method is tested with imaging simulation of point source and extended source, and the superiority is also demonstrated by comparing with the existing phase-modified Fourier transform method. At last, the field experiment with one-dimensional SAIR instrument is performed to validate the practical feasibility of this method.
英文摘要	With the benefits of digital IC technology development, the synthetic aperture interferometric radiometer (SAIR) technique is growing fast and expanding to more and more application areas. The near field imaging detection is a potential application which has received increasing demand recently. Because the Fourier imaging theory of the traditional SAIR is based on far-field approximation, it will be invalid for near-field condition. This paper is devoted to establishing a new accurate imaging algorithm for near-field SAIR imaging. Firstly, the visibility function in near field is deduced and the relationship of which to far-field visibility function is analyzed. Then, a numerical method based on pseudo inverse and focal plane approximation is developed. The effectivity of this method is tested with imaging simulation of point source and extended source, and the superiority is also demonstrated by comparing with the existing phase-modified Fourier transform method. At last, the field experiment with one-dimensional SAIR instrument is performed to validate the practical feasibility of this method.
学科主题	微波遥感
收录类别	SCI ; EI
资助信息	National Natural Science Foundation of China [40671121, 40701100, 40801136]
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3434]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	Zhang Cheng,Wu Ji,Liu Hao,et al. Imaging algorithm for synthetic aperture interferometric radiometer in near field[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2011,54(8):2224-2231.
APA	Zhang Cheng,Wu Ji,Liu Hao,&Yan JingYe.(2011).Imaging algorithm for synthetic aperture interferometric radiometer in near field.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,54(8),2224-2231.
MLA	Zhang Cheng,et al."Imaging algorithm for synthetic aperture interferometric radiometer in near field".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 54.8(2011):2224-2231.