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

fYear

2011

fDate

24-29 July 2011

Firstpage

336

Lastpage

339

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International

Conference_Location

Vancouver, BC

ISSN

2153-6996

Print_ISBN

978-1-4577-1003-2

Type

conf

DOI

10.1109/IGARSS.2011.6048967

Filename

6048967