Remote Sensing Applications and Decision Support

Realization of strong backscattering homogeneous regions with known backscattering coefficient in synthetic aperture radar images

[+] Author Affiliations
Xin Lin, Kaizhi Wang, Junfeng Wang, Xingzhao Liu

Shanghai Jiao Tong University, Department of Electronic Engineering, 800 Dongchuan Road, Shanghai 200240, China

J. Appl. Remote Sens. 11(1), 016018 (Feb 01, 2017). doi:10.1117/1.JRS.11.016018
History: Received September 3, 2016; Accepted January 10, 2017
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Abstract.  The strong backscattering homogeneous region, i.e., a uniform region with a high and constant backscattering coefficient, is important for synthetic aperture radar (SAR) image quality assessment and SAR radiometric calibration, which, however, is difficult to realize in practice with a known backscattering coefficient. We realize a strong backscattering homogeneous region with a known backscattering coefficient in SAR images by utilizing designed metal grids. First, we propose a manmade grid-structure target and realize it with aluminum in practice, which is named the metal grid. Then, the backscattering coefficient of the designed metal grid is simulated in the computer simulation technology (CST) microwave studio and measured by a radar cross-section (RCS) measurement instrument in a microwave anechoic chamber. Both CST simulation results and RCS measurement results confirm the strong backscattering property of the designed target. In addition, by utilizing the designed target, we realize a test field consisting of several strong backscattering homogeneous regions with different sizes at Shanghai Jiao Tong University, Shanghai, China. The spaceborne experiments have been carried out by the TerraSAR-X sensor over the test field in two flight campaigns in X-band with VV polarization. Experimental results demonstrate the strong backscattering property and homogeneity of the realized regions.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Xin Lin ; Kaizhi Wang ; Junfeng Wang and Xingzhao Liu
"Realization of strong backscattering homogeneous regions with known backscattering coefficient in synthetic aperture radar images", J. Appl. Remote Sens. 11(1), 016018 (Feb 01, 2017). ; http://dx.doi.org/10.1117/1.JRS.11.016018


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