Sliding Spotlight Mode Imaging with GF-3 Spaceborne SAR Sensor

被引：6
|
作者：
Zhang, Qingjun [1 ,2 ]
Xiao, Feng [1 ]
Ding, Zegang [1 ]
Ke, Meng [1 ]
Zeng, Tao [1 ]
机构：
[1] Beijing Inst Technol, Sch Informat & Elect, Beijing Key Lab Embedded Real Time Informat Proc, Beijing 100081, Peoples R China
[2] Beijing Inst Space Syst Engn, China Acad Space Technol, Beijing 100086, Peoples R China
来源：
SENSORS | 2018年 / 18卷 / 01期
基金：
中国国家自然科学基金;
关键词：
synthetic aperture radar (SAR); sliding spotlight; two-step processing approach; Doppler parameter estimation; ALGORITHM; EXTENSION;
D O I：
10.3390/s18010043
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Synthetic aperture radar (SAR) sliding spotlight work mode can achieve high resolutions and wide swath (HRWS) simultaneously by steering the radar antenna beam. This paper aims to obtain well focused images using sliding spotlight mode with the Chinese Gaofen-3 SAR sensor. We proposed an integrated imaging scheme with sliding spotlight echoes. In the imaging scheme, the two-step approach is applied to the spaceborne sliding spotlight SAR imaging algorithm, followed by the Doppler parameter estimation algorithm. The azimuth spectral folding phenomenon is overcome by the two-step approach. The results demonstrate a high Doppler parameter estimation accuracy. The proposed imaging process is accurate and highly efficient for sliding spotlight SAR mode.
引用
收藏
页数：13
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