An Azimuth Resampling based Imaging Algorithm for Highly Squinted Sliding Spotlight and TOPS SAR
Conference: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
06/03/2014 - 06/05/2014 at Berlin, Germany
Proceedings: EUSAR 2014
Pages: 4Language: englishTyp: PDF
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Authors:
Wu, Yufeng; Xing, Mengdao; Sun, Guang-Cai; Deng, Jun; Bao, Zheng (National Key Laboratory of Radar Signal Processing, Xidian University, China)
Abstract:
This paper focuses on the data processing of highly squinted sliding spotlight and Terrain Observation by Progressive Scans (TOPS) SAR and a novel azimuth resampling based imaging algorithm is proposed. After performing linear range walk correction (LRWC), azimuth convolution pre-processing is then performed to reconstruct the signal spectrum. A key step is to perform azimuth resampling in the two-dimensional frequency domain to eliminate the azimuth-variation induced by LRWC. As such, the data can be focused by exploiting a conventional broadside SAR imaging algorithm. Simulation and real data results show the effectiveness of the proposed algorithm.