Extended three-step focusing algorithm for sliding spotlight and tops data image formation

Author

Yang Wei ; Li Chunsheng ; Chen Jie ; Wang Pengbo

Author_Institution

Sch. of Electron. & Inf. Eng., Beijing Univ. of Aeronaut. & Astronaut., Beijing, China

fYear

2011

fDate

24-29 July 2011

Firstpage

479

Lastpage

482

Abstract

This paper conducted thorough research to the theory of space-borne Sliding spotlight and TOPS data processing. First, the unified definition of hybrid factor of both TOPS and sliding spotlight mode was given. Then, the hybrid factor was analyzed and amended along the range direction combined the geometry model. Combined with amended hybrid factor, azimuthal time-frequency characteristic of was analyzed and discussed in detail by mathematic derivation. Based on the analysis, an efficient and precise extended three-step image formation algorithm was presented for sliding spotlight and TOPS image formation. Finally, the imaging results justify the effectiveness of the extended three-step algorithm.

Keywords

geometry; radar imaging; spaceborne radar; TOPS data processing; azimuthal time-frequency characteristic; data image formation; extended three-step algorithm; extended three-step focusing algorithm; geometry model; space-borne sliding spotlight; three-step image formation algorithm; Antennas; Azimuth; Chirp; Doppler effect; Equations; Focusing; Signal processing algorithms; Chirp Scaling; azimuth deramp; hybrid factor; synthetic aperture radar (SAR);

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.2011.6049169

Filename

6049169