Autofocusing using multiscale local correlation

Carole E. Nahum

doi:10.1117/12.331359

20 November 1998 Autofocusing using multiscale local correlation

Carole E. Nahum

Proceedings Volume 3497, SAR Image Analysis, Modeling, and Techniques; (1998) https://doi.org/10.1117/12.331359
Event: Remote Sensing, 1998, Barcelona, Spain

Abstract

Ground imaging using a Synthetic Aperture Radar (SAR) requires the knowledge of the antenna trajectory with a relative accuracy of a fraction of the wavelength upon an integration time of a few seconds. This information is not always available from inertial navigation unit especially in the airborne framework and must be recovered from the radar signal itself using the techniques known as 'autofocus.' We describe in this paper an original method designed at ONERA for the registration of looks. We show how it applies to autofocusing. It improves the map-drift algorithm making it time variant thus allowing for the correction of low frequency trajectory errors, and not only velocity bias.

Citation Download Citation

Carole E. Nahum "Autofocusing using multiscale local correlation", Proc. SPIE 3497, SAR Image Analysis, Modeling, and Techniques, (20 November 1998); https://doi.org/10.1117/12.331359

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