作者
Guangcai Sun, Mengdao Xing, Yong Wang, Yufeng Wu, Yirong Wu, Zheng Bao
发表日期
2011/5/31
期刊
IEEE Geoscience and Remote Sensing Letters
卷号
8
期号
6
页码范围
1036-1040
出版商
IEEE
简介
During the data acquisition of a sliding spotlight or terrain observation by progressive scan (TOPS) synthetic aperture radar (SAR), the steering of the antenna main beam increases the azimuth bandwidth but could result in the azimuth signal aliasing in the Doppler domain. To remove the aliasing, one has used a subaperture method. In this letter, we show a focusing scheme without the use of the subaperture for both sliding spotlight and TOPS SARs. In doing so, we eliminated the obvious increase in data volume or the subaperture division by choosing the pulse repetition frequency that is only 20% greater than the instantaneous bandwidth. The method was incorporated with an available imaging algorithm and then used to process simulated and collected data of the sliding spotlight and TOPS SARs. Well-focused results without aliasing were obtained.
引用总数
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学术搜索中的文章
G Sun, M Xing, Y Wang, Y Wu, Y Wu, Z Bao - IEEE Geoscience and Remote Sensing Letters, 2011