2013•Unpublished venueRequires access

A new approach for spotlight geosynchronous SAR data focusing

Bingji Zhao, Xiangyang Qi, Hongjun Song, Robert Wang, Zhiguang Zhang, Hai Jiang

Abstract

Besides the evident superiority, the Geosynchronous Earth orbit synthetic aperture radar (Geo-SAR) system meets great more challenges than the current Low-Earth-Orbital SAR (Leo-SAR) and the Medium-Earth-Orbit SAR (Meo-SAR). The signal processing approach for spotlight mode Geo-SAR is discussed in this paper. A new range model called the sixth-order Doppler parameter range model (DRM-6) is derived based on the accurate sixth-order Doppler parameter calculation algorithm. The accuracy of Hyperbolic Range equation (HRE) and the DRM-6 are compared. According to the non-linear property of the synthetic aperture, the Back projection algorithm is chosen for image formation. At last the simulation results validate that DRM-6 has a good effect on the L-Band spotlight Geo-SAR system with a azimuth resolution around 2m.

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Available abstract

Key concepts: Geosynchronous orbit, Synthetic aperture radar, Azimuth, Computer science, Inverse synthetic aperture radar, Remote sensing, Radar imaging, Range (aeronautics)