Title :
Back projection algorithm for high resolution GEO-SAR image formation
Author :
Li Zhuo ; Li Chunsheng ; Yu Ze ; Zhou Jian ; Chen Jie
Author_Institution :
Sch. of Electron. & Inf. Eng., BeiHang Univ., Beijing, China
Abstract :
Geosynchronous orbit synthetic aperture radar (GEO-SAR) has a good application prospect for its shorter repeat period and a wider swath compared to low Earth orbit SAR. Doppler characteristic of the echo is analyzed. The Doppler history varies frequently in space and approximates a high order signal. A back projection algorithm for high resolution GEO-SAR based on satellite-ground geometry model is preliminarily proposed. Steps of the algorithm are given. The simulation results indicate the algorithm can achieve high resolution image formation in large scene. The azimuth resolution is less than 2m.
Keywords :
Doppler radar; backpropagation; geophysical image processing; radar cross-sections; radar imaging; synthetic aperture radar; Doppler characteristic; Doppler history; back projection algorithm; echo; geosynchronous orbit synthetic aperture radar; high order signal; high resolution GEO-SAR image formation; satellite-ground geometry model; Azimuth; Doppler effect; History; Image coding; Image resolution; Imaging; Orbits; Geosynchronous Orbit; Image Formation Algorithm; Synthetic Aperture Radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1003-2
DOI :
10.1109/IGARSS.2011.6048967
