Moving ships refocusing for spaceborne SAR based on Doppler parameters estimation

The Journal of Engineering

Yunfei Zhu¹  Zhen Dong¹  Feng He¹ 

[1] College of Electronic Science, National University of Defence Technology;

关键词: ships;    synthetic aperture radar;    parameter estimation;    radar imaging;    spaceborne radar;    remote sensing by radar;    high-resolution spaceborne SAR images;    refocusing step;    refocusing method;    Doppler parameters search;    ship images;    single-look complex image data;    GF-3 satellite SAR data refocusing results;    Doppler parameters estimation;    moving ships imaging;    marine remote-sensing;    spaceborne synthetic aperture radar;   

DOI  :  10.1049/joe.2019.0447

来源: DOAJ

【 摘 要 】

Moving ships imaging is an important issue in marine remote-sensing by spaceborne synthetic aperture radar (SAR). As the moving ships defocus generally in high-resolution spaceborne SAR images, the refocusing step is demanded for the following processing in classification and identification. A new refocusing method based on Doppler parameters search is proposed to enhance the performance of ship images. This method is applied directly on the single-look complex image data. Furthermore, the space-variant characteristic of Doppler parameters is taken into account within this method. Finally, the GF-3 satellite SAR data refocusing results of moving ships verify the effectiveness of the proposed method.

【 授权许可】

Unknown