Beam characteristics of three-dimensional SAR in curved or random paths

被引:45
作者
Axelsson, SRJ [1 ]
机构
[1] Swedish Def Res Agcy & Saab Bofors Dynam, S-58188 Linkoping, Sweden
来源
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2004年 / 42卷 / 10期
关键词
circle path; random paths; synthetic aperture radar (SAR); spiral path; three-dimensional (3-D) imaging; tomography;
D O I
10.1109/TGRS.2004.834802
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
Interferometric synthetic aperture radar (InSAR) provides average height information by combining data from two parallel paths. True three-dimensional (3-D) SAR also detects the height distribution, which is of significant interest in airborne reconnaissance, forest inventory, and subsurface or wall-penetrating sensing applications as examples. In this paper, the beam performance of 3-D SAR is studied and compared for different curved line paths, such as circles, ellipses, and spirals ending up with random sampling. Curved path geometry reduces the ambiguity in height angle of traditional multipass SAR, and random path variation further improves the sidelobe suppression. The poor sidelobe suppression of a single circle path is significantly improved in near-range geometry in combination with high range resolution. By introducing a window function dependent on focus point and path position, high sidelobe suppression was achieved in an extended ground area below the circle path.
引用
收藏
页码:2324 / 2334
页数:11
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