Radiometric and Spatial Resolution Constraints in Millimeter-Wave Close-Range Passive Screener Systems

被引：10
|
作者：
Nova, Enrique [1 ]
Romeu, Jordi [1 ]
Torres, Francesc [1 ]
Pablos, Miriam [1 ]
Manuel Riera, Jose [2 ]
Broquetas, Antoni [1 ]
Jofre, Lluis [1 ]
机构：
[1] Univ Politecn Cataluna, ES-08034 Barcelona, Spain
[2] Univ Politecn Madrid, E-28040 Madrid, Spain
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2013年 / 51卷 / 04期
关键词：
Aperture synthesis; near-field (NF) imaging; passive screeners; radiometric sensitivity; APERTURE SYNTHESIS; SENSITIVITY;
D O I：
10.1109/TGRS.2012.2211025
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
This paper presents a comparative study of the radiometric sensitivity and spatial resolution of three near-field (NF) passive screener systems: real aperture, 1-D synthetic aperture (SA), and 2-D SA radiometers are compared. The analytical expressions for the radiometric resolution, the number of required antennas, and the number of pixels in the image are derived taking into account the distortion produced by the NF geometry at nonboresight directions where the distortion is dominant. Based on the theoretical results, a performance comparison among the studied systems is carried out to show the advantages and drawbacks when using the radiometers in a close-range screening application. Moreover, the screener performance in a close-range environment is discussed from the results obtained in the aforementioned comparison.
引用
收藏
页码：2327 / 2336
页数：10
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