Large-Scene Sliding Spotlight SAR Using Multiple Channels in Azimuth

被引：13

作者：

Gao, Canguan ^{[1
,2
]}

Wang, Robert ^{[3
]}

Deng, Yunkai ^{[3
]}

Feng, Jin ^{[3
]}

Yan, He ^{[3
]}

Balz, Timo ^{[4
]}

机构：

[1] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

[2] Yili Normal Univ, Yili 835000, Peoples R China

[3] Chinese Acad Sci, Dept Space Microwave Remote Sensing Syst, Inst Elect, Beijing 100190, Peoples R China

[4] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2013年 / 10卷 / 05期

关键词：

Large scene; multiple azimuth channel (MAC); sliding spotlight; synthetic aperture radar (SAR); SCALING ALGORITHM;

D O I：

10.1109/LGRS.2012.2227929

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

In this letter, we suggest using multiple azimuth channels (MACs) for synthetic aperture radar in the sliding spotlight mode. First, we analyze the scene size constraints of conventional sliding spotlight mode, showing that a large scene size requires long scene illumination time. However, while using multiple channels in azimuth, this could be changed. Dividing a long antenna into small antennas, we can increase the azimuth resolution improvement fact, where the range size will not be reduced. Therefore, with the same illumination time, the azimuth imaging width can be enlarged for a given azimuth resolution. However, using the MAC sliding spotlight mode, the nonuniform sampling problem occurs. Unlike the processing in the MAC stripmap mode, in the MAC sliding spotlight mode, the unambigous reconstruction should be performed after the deramping in azimuth. Finally, an example is given to validate the proposed new configuration and the corresponding algorithms.

引用

页码：1006 / 1010

页数：5