作者
Yufeng Wu, Guang-Cai Sun, Xiang-Gen Xia, Mengdao Xing, Jun Yang, Zheng Bao
发表日期
2013/5/13
期刊
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
卷号
7
期号
1
页码范围
213-221
出版商
IEEE
简介
During the data acquisition of a squint terrain observation by progressive scan (TOPS) synthetic aperture radar (SAR), the steering of the antenna main beam increases the azimuth bandwidth and results in the azimuth signal aliasing in the Doppler domain. Besides, the range curvature and the Doppler frequency modulation (FM) rates after linear range walk correction are azimuth-variant for squint TOPS SAR. These problems may cause some difficulties for the SAR data processing. To deal with the problems, a new imaging algorithm for the squint TOPS SAR is introduced in this paper. After linear range walk correction, the azimuth preprocessing is implemented to achieve the two-dimensional frequency spectrum without aliasing. Then, utilizing a modified chirp scaling algorithm, we complete the range cell migration correction (RCMC) and range compression to the TOPS SAR data without subaperture. Finally, the …
引用总数
20142015201620172018201920202021202220234247583722
学术搜索中的文章
Y Wu, GC Sun, XG Xia, M Xing, J Yang, Z Bao - IEEE Journal of Selected Topics in Applied Earth …, 2013