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A Novel Multi-Angle SAR Imaging System and Method Based on an Ultrahigh Speed Platform

National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
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Sensors 2019, 19(7), 1701; https://doi.org/10.3390/s19071701
Received: 20 January 2019 / Revised: 31 March 2019 / Accepted: 3 April 2019 / Published: 10 April 2019
(This article belongs to the Special Issue Synthetic Aperture Radar (SAR) Techniques and Applications)
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Abstract

Considering the difficulty of pulse repetition frequency (PRF) design in multi-angle SAR when using ultra-high speed platforms, a multi-angle SAR imaging system in a unified coordinate system is proposed. The digital multi-beamforming is used in the system and multi-angle SAR data can be obtained in one flight. Therefore, the system improves the efficiency of data recording. An improved range migration algorithm (RMA) is used for data processing, and imaging is made in a unified imaging coordinate system. The resolution of different view images is the same, and there is a fixed delay between the images. On this basis, the SAR image fusion is performed after image matching. The results of simulation and measured data confirm the effectiveness of the system and the method. View Full-Text
Keywords: SAR imaging; multi-angle SAR; improved RMA; SAR image fusion SAR imaging; multi-angle SAR; improved RMA; SAR image fusion
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Chang, W.; Tao, H.; Sun, G.; Wang, Y.; Bao, Z. A Novel Multi-Angle SAR Imaging System and Method Based on an Ultrahigh Speed Platform. Sensors 2019, 19, 1701.

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