Image Formation Algorithm for Topside Ionosphere Sounding with Spaceborne HF-SAR System

Author

Jie, Chen ; Zhuo, Li ; Wei, Liu ; Chunsheng, Li ; Yinqing, Zhou

Author_Institution

Sch. of Electron. & Inf. Eng., BeiHang Univ., Beijing

Volume

2

fYear

2008

fDate

7-11 July 2008

Abstract

The exploration of ionosphere is significant for satellite communication and navigation etc. Spaceborne HF-SAR is utilized for the observation of topside ionosphere, in order to acquire higher spatial resolution, global scale ionospheric electron density map and irregularities distribution. The operation mode and system parameters are introduced. The echo signal of spaceborne HF-SAR has long synthetic aperture time, large range migration, and small depth of focus due to the low carrier frequency. Considering these characteristics of spaceborne HF-SAR, a two dimension time-frequency domain correlation image formation algorithm is presented. The effectiveness of the algorithm is validated by computer simulation results.

Keywords

ionospheric measuring apparatus; spaceborne radar; synthetic aperture radar; image formation algorithm; navigation; satellite communication; spaceborne HF-SAR system; topside ionosphere sounding; Azimuth; Dipole antennas; Electrons; Focusing; Image resolution; Ionosphere; Radar imaging; Satellite communication; Satellite navigation systems; Spaceborne radar; HF-SAR; image formation; ionosphere sounding;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IGARSS.2008.4779050

Filename

4779050