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- Title
Investigation of Wavenumber Domain Imaging Algorithm for Ground-Based Arc Array SAR.
- Authors
Zengshu Huang; Jinping Sun; Weixian Tan; Pingping Huang; Kuoye Han
- Abstract
Ground-based synthetic aperture radar (GB-SAR) has become an important technique for remote sensing deformation monitoring. However, most of the existing GB-SAR systems realize synthetic aperture by exploiting two closely spaced horn antennas to move along a linear rail. In order to obtain higher data acquisition efficiency and a wider view angle, we introduce arc antenna array technology into the GB-SAR system, which realizes a novel kind of system: ground-based arc array SAR (GB-AA-SAR). In this paper, we analyze arc observation geometry and derive analytic expressions of sampling criteria. Then, we propose a novel wavenumber domain imaging algorithm for GB-AA-SAR, which can achieve high image reconstruction precision through numerical solutions in the wavenumber domain. The proposed algorithm can be applied in wide azimuth view angle scenarios, and the problem of azimuth mismatch caused by distance approximation in arc geometric efficient omega-k imaging can be solved successfully. Finally, we analyze the two-dimensional (2D) spatial resolution of GB-AA-SAR, and verify the effectiveness of the proposed algorithm through numerical simulation experiments.
- Subjects
WAVENUMBER; ANTENNA arrays; SYNTHETIC aperture radar; NUMERICAL solutions to equations; GLOBAL Positioning System
- Publication
Sensors (14248220), 2017, Vol 17, Issue 12, p2950
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s17122950