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

Xin Lin; Kaizhi Wang; Junfeng Wang; Xingzhao Liu

doi:10.1117/1.JRS.11.016018

1 February 2017 Realization of strong backscattering homogeneous regions with known backscattering coefficient in synthetic aperture radar images

Xin Lin, Kaizhi Wang, Junfeng Wang, Xingzhao Liu

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 11, Issue 1, 016018 (February 2017). https://doi.org/10.1117/1.JRS.11.016018

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.

Citation Download 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," Journal of Applied Remote Sensing 11(1), 016018 (1 February 2017). https://doi.org/10.1117/1.JRS.11.016018

Received: 3 September 2016; Accepted: 10 January 2017; Published: 1 February 2017

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