A New Subaperture Chirp Scaling Algorithm for Spaceborne Spotlight SAR Data Focusing
In order to overcome the azimuth spectrum folding occurrence in the spotlight imaging mode of the high resolution spaceborne Synthetic Aperture Radar (SAR), we presented a new extended subaperture chirp scaling algorithm (CSA) in this paper. Several phase functions of the extended CSA were modified according to the properties of subaperture processing. These modifications make the new algorithm realize the precise recombination of the phase history data of each subaperture without any additional computation load, making the subaperture overlapping and azimuth time extension unnecessary. The validity of this new algorithm is proved through point target simulations by adopting TerraSAR-X system parameters in the spotlight mode with 1m resolution and a swath of 10Km both in the range and azimuth.
Sun Jinping Yang Zhifeng Hong Wen Mao Shiyi
Univ.of Aeronautics and Astronautics,Beijing 100083,P.R.China Nat.Key Lab of MW Imaging Tech.,Institute of Electronics,CAS,Beijing 100080,P.R.China
国际会议
首届亚太合成孔径雷达会议(1st Asian and Pacific Conference on Synthetic Aperture Radar Proceedings)
安徽黄山
英文
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）