Oceanic surface XTI SAR simulation for TOPS imaging mode

Shuang Wu; Yuxin Hou; Haifeng Huang; Xiaoqing Wang

doi:10.1117/12.2503211

9 August 2018 Oceanic surface XTI SAR simulation for TOPS imaging mode

Shuang Wu, Yuxin Hou, Haifeng Huang, Xiaoqing Wang

Proceedings Volume 10806, Tenth International Conference on Digital Image Processing (ICDIP 2018); 108063Q (2018) https://doi.org/10.1117/12.2503211
Event: Tenth International Conference on Digital Image Processing (ICDIP 2018), 2018, Shanghai, China

Abstract

This paper presents a simulation of cross-track interferometry (XTI) for TOPS imaging mode with moving sea surface, which includes ocean scene modeling, raw data simulation and interferometric processing. An interferometric elevation of oceanic surface with TOPS imaging mode is acquired during the simulation. Due to the random motion of the oceanic surface, a model of time-domain raw data generation is established to update the normalized radar cross section (NRCS) and the height of the oceanic surface at each azimuth time. For the TOPS mode, the antenna beams steers in azimuth direction resulting in high Doppler centroid frequency variation, which requires stringent coregistration accuracy. In this paper, an Improved Spectral Diversity (ISD) coregistration algorithm is proposed to improve the coregistration accuracy and reduce the elevation measurement error of the ocean surface. Both Spectral Diversity (SD) algorithm and ISD algorithm are simulated and the simulation results show the ISD can effectively reduce the elevation error.

Citation Download Citation

Shuang Wu, Yuxin Hou, Haifeng Huang, and Xiaoqing Wang "Oceanic surface XTI SAR simulation for TOPS imaging mode ", Proc. SPIE 10806, Tenth International Conference on Digital Image Processing (ICDIP 2018), 108063Q (9 August 2018); https://doi.org/10.1117/12.2503211

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KEYWORDS

Interferometry

Image processing

Synthetic aperture radar

Scattering

Doppler effect

Data modeling

Phase interferometry

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