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Imaging algorithm for synthetic aperture interferometric radiometer in near field
Zhang Cheng; Wu Ji; Liu Hao; Yan JingYe; Zhang, C (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Key Lab Microwave Remote Sensing, CAS, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
2011
Volume54Issue:8Pages:2224-2231
ISSN1674-7321
Language英语
KeywordSynthetic Aperture Interferometric Radiomter (Sair) Near Field Imaging Numerical Method Pseudo Inversion
AbstractWith 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.; 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.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3434
Collection微波遥感部
Corresponding AuthorZhang, C (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Key Lab Microwave Remote Sensing, CAS, Beijing 100190, Peoples R China.
Recommended Citation
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,&Zhang, C .(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.
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