Motion compensation for bistatic SAR frequency domain algorithm

Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany

Proceedings: EUSAR 2006

Pages: 4Language: englishTyp: PDF

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Giroux, Vincent; Cantalloube, Hubert (ONERA -Chemin de la Huniere 91761 PALAISEAU CEDEX France)
Daout, Franck (GEA university PARIS 10 PST Villes d'Avray -1 chemin desvallieres 92410 Villes d'Avray, France)

Bistatic SAR uses transmitter and receiver flying distinct platforms. There are two principal kinds of algorithms for computing bistatic SAR image: temporal domain as fast back projection or frequency domain synthesis as w-k algorithm. The latter is more computationally efficient, particularly in monostatic case when used in computing images with wide bandwidth. Unfortunately, to compute this algorithm, nominal trajectories are assumed to be rectilinear: this results in error of phase. In monostatic case, a compensation stage can be computed with a geometrical approach. A mathematical approach is presented to extend this idea to the bistatic case.