New algorithms for widefield SAR image formation

被引：26

作者：

Carrara, WG ^{[1
]}

Goodman, RS ^{[1
]}

Ricoy, MA ^{[1
]}

机构：

[1] Gen Dynam Adv Informat Syst, Ann Arbor, MI 48113 USA

来源：

PROCEEDINGS OF THE IEEE 2004 RADAR CONFERENCE | 2004年

关键词：

D O I：

10.1109/NRC.2004.1316392

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

The widefield polar format algorithm, the Stolt polar algorithm, and the differential Doppler algorithm use variations of a new along-track alignment and formatting system (ATAFS) to generate fine-resolution images from synthetic aperture radar (SAR) data. ATAFS introduces a spatially-variant modification of the SAR phase history storage format to remove the formatting inaccuracies of the conventional polar format algorithm and enable full image quality over large scenes without range curvature distortion or image defocus. These new algorithms are well-suited for processing fine resolution spotlight and ultra-wideband SAR data. Their image quality performance is comparable to that of the range migration algorithm (RMA). Unlike RMA, the new algorithms operate on data stabilized to a fixed reference point to remove the azimuth chirp (the Doppler bandwidth of the reference point) before it compromises processor efficiency.

引用

页码：38 / 43

页数：6