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Proceedings Paper

New algorithm for processing hybrid strip-map/spotlight-mode synthetic aperture radar data
Author(s): Gianfranco Fornaro; Riccardo Lanari; Eugenio Sansosti; F. Serafino; Simona Zoffoli
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Paper Abstract

We present a new algorithm for processing hybrid strip-map/spotlight SAR data which is based on a two-step focusing strategy. The first step performs an azimuth raw data filtering operation implemented via the (azimuth) convolution between the SAR data and a chirp signal with a properly chosen constant chirp rate. Following this step, the spectral folding of the azimuth raw signal spectrum is resolved and the space-variant characteristics of the system transfer function are preserved. Therefore, we can achieve the full focusing of the data by a conventional strip-map processing step implemented in frequency domain and requiring only a minor modification. The proposed algorithm is simple, efficient and has the unique feature of being suitable for processing strip-map, spotlight and hybrid strip-map/spotlight mode, the first two being particular cases of the more general last one. The presented experiments are carried out on simulated data relative to the COSMO/SkyMed sensors operating in the hybrid strip- map/spotlight mode; these results clarify the rationale of the proposed approach and confirm its validity.

Paper Details

Date Published: 21 December 2000
PDF: 12 pages
Proc. SPIE 4173, SAR Image Analysis, Modeling, and Techniques III, (21 December 2000); doi: 10.1117/12.410667
Show Author Affiliations
Gianfranco Fornaro, Istituto di Ricerca per l'Elettromagnetismo e i Componenti Elettronici (Italy)
Riccardo Lanari, Istituto di Ricerca per l'Elettromagnetismo e i Componenti Elettronici (Italy)
Eugenio Sansosti, Istituto di Ricerca per l'Elettromagnetismo e i Componenti Elettronici (Italy)
F. Serafino, Istituto di Ricerca per l'Elettromagnetismo e i Componenti Elettronici (Italy)
Simona Zoffoli, Italian Space Agency (Italy)


Published in SPIE Proceedings Vol. 4173:
SAR Image Analysis, Modeling, and Techniques III
Francesco Posa; Luciano Guerriero, Editor(s)

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