Title :
A Nonlinear Refined Extended Chirp Scaling Algorithm for Spaceborne ScanSAR
Author :
Jie, Wei ; Houjin, Chen ; Xiaofeng, Zhong
Author_Institution :
Sch. of Electron. & Inf. Eng., Beijing Jiaotong Univ., Beijing
Abstract :
In this paper, a new nonlinear Refined Extended Chirp Scaling (RECS) imaging algorithm is proposed for spaceborne ScanSAR with large cell migration to resolve the effects of residual cubic phase error in the deducing of the traditional RECS algorithm. The algorithm achieves cubic phase error correction of RECS by nonlinear filter to improve the spaceborne ScanSAR image qualities. The full derivation and the realizing approach of the algorithm are presented. And the algorithm is verified with simulations.
Keywords :
geophysical techniques; remote sensing by radar; spaceborne radar; synthetic aperture radar; ECS method; Extended Chirp Scaling; RECS imaging algorithm; airborne range broadside model; nonlinear Refined Extended Chirp Scaling algorithm; residual cubic phase error; spaceborne ScanSAR; squint range model; synthetic aperture radar; Azimuth; Chirp; Error correction; Image quality; Image resolution; Pulse width modulation; Radar antennas; Solid modeling; Spaceborne radar; Synthetic aperture radar; RECS; Spaceborne ScanSAR; nonlinear compensation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779961
