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Sensors 2018, 18(1), 43; https://doi.org/10.3390/s18010043

Sliding Spotlight Mode Imaging with GF-3 Spaceborne SAR Sensor

1
Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
2
China Academy of Space Technology, Beijing Institute of Space System Engineering, Beijing 100086, China
*
Author to whom correspondence should be addressed.
Received: 1 November 2017 / Revised: 21 December 2017 / Accepted: 22 December 2017 / Published: 26 December 2017
(This article belongs to the Special Issue First Experiences with Chinese Gaofen-3 SAR Sensor)
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Abstract

Synthetic aperture radar (SAR) sliding spotlight work mode can achieve high resolutions and wide swath (HRWS) simultaneously by steering the radar antenna beam. This paper aims to obtain well focused images using sliding spotlight mode with the Chinese Gaofen-3 SAR sensor. We proposed an integrated imaging scheme with sliding spotlight echoes. In the imaging scheme, the two-step approach is applied to the spaceborne sliding spotlight SAR imaging algorithm, followed by the Doppler parameter estimation algorithm. The azimuth spectral folding phenomenon is overcome by the two-step approach. The results demonstrate a high Doppler parameter estimation accuracy. The proposed imaging process is accurate and highly efficient for sliding spotlight SAR mode. View Full-Text
Keywords: synthetic aperture radar (SAR); sliding spotlight; two-step processing approach; Doppler parameter estimation synthetic aperture radar (SAR); sliding spotlight; two-step processing approach; Doppler parameter estimation
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Zhang, Q.; Xiao, F.; Ding, Z.; Ke, M.; Zeng, T. Sliding Spotlight Mode Imaging with GF-3 Spaceborne SAR Sensor. Sensors 2018, 18, 43.

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