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Article

Residual Motion Error Correction with Backprojection Multisquint Algorithm for Airborne Synthetic Aperture Radar Interferometry

1
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2
School of Computer Science and Technology, Xidian University, Xi’an 710071, China
3
School of Electronics and Communication Engineering, Sun Yat-Sen University, Guangzhou 510275, China
4
Beijing Institute of Radio Measurement, The Second Academy of China Aerospace Science and Industry Corporation (CASIC), Beijing 100854, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(10), 2342; https://doi.org/10.3390/s19102342
Received: 15 April 2019 / Revised: 4 May 2019 / Accepted: 7 May 2019 / Published: 21 May 2019
(This article belongs to the Section Remote Sensors)
For airborne interferometric synthetic aperture radar (InSAR) data processing, it is essential to achieve precise motion compensation to obtain high-quality digital elevation models (DEMs). In this paper, a novel InSAR motion compensation method is developed, which combines the backprojection (BP) focusing and the multisquint (MSQ) technique. The algorithm is two-fold. For SAR image focusing, BP algorithm is applied to fully use the navigation information. Additionally, an explicit mathematical expression of residual motion error (RME) in the BP image is derived, which paves a way to integrating the MSQ algorithm in the azimuth spatial wavenumber domain for a refined RME correction. It is revealed that the proposed backprojection multisquint (BP-MSQ) algorithm exploits the motion error correction advantages of BP and MSQ simultaneously, which leads to significant improvements of InSAR image quality. Simulation and real data experiments are employed to illustrate the effectiveness of the proposed algorithm. View Full-Text
Keywords: interferometric synthetic aperture radar (InSAR); backprojection (BP); multisquint (MSQ); residual motion error (RME); motion compensation (MoCo) interferometric synthetic aperture radar (InSAR); backprojection (BP); multisquint (MSQ); residual motion error (RME); motion compensation (MoCo)
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MDPI and ACS Style

Xie, P.; Zhang, M.; Zhang, L.; Wang, G. Residual Motion Error Correction with Backprojection Multisquint Algorithm for Airborne Synthetic Aperture Radar Interferometry. Sensors 2019, 19, 2342. https://doi.org/10.3390/s19102342

AMA Style

Xie P, Zhang M, Zhang L, Wang G. Residual Motion Error Correction with Backprojection Multisquint Algorithm for Airborne Synthetic Aperture Radar Interferometry. Sensors. 2019; 19(10):2342. https://doi.org/10.3390/s19102342

Chicago/Turabian Style

Xie, Pengfei, Man Zhang, Lei Zhang, and Guanyong Wang. 2019. "Residual Motion Error Correction with Backprojection Multisquint Algorithm for Airborne Synthetic Aperture Radar Interferometry" Sensors 19, no. 10: 2342. https://doi.org/10.3390/s19102342

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