Ambiguities and Image Quality in Staggered SAR

Villano M, Krieger G, Moreira A (2015)

Publication Type: Conference contribution

Publication year: 2015

Publisher: Institute of Electrical and Electronics Engineers Inc.

Edited Volumes: Proceedings of the 2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015

Pages Range: 204-209

Conference Proceedings Title: Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)

ISBN: 9781467372961

URI: https://elib.dlr.de/96973/

DOI: 10.1109/APSAR.2015.7306189

Abstract

Staggered SAR is an innovative synthetic aperture radar (SAR) concept, where the pulse repetition interval (PRI) is continuously varied. This, together with digital beamforming (DBF) in elevation, allows high-resolution imaging of a wide continuous swath without the need for a long antenna with multiple azimuth apertures. As an additional benefit, the energy of range and azimuth ambiguities is spread over large areas: Ambiguities therefore appear in the image as a noise-like disturbance rather than localized artifacts. An analytical expression for the range-ambiguity-to-signal ratio (RASR) in staggered SAR is provided and a novel method for the estimation of the azimuth ambiguity-to-signal ratio (AASR) is proposed. A C-band design example based on a planar antenna is shown as well. The impact of staggered SAR operation on image quality is further assessed using highly oversampled F-SAR airborne data.

Authors with CRIS profile

Gerhard Krieger

Additional Organisation(s)

Professur für Kognitive Radarsysteme für die Fernerkundung

Involved external institutions

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) / German Aerospace Center DE Germany (DE)

How to cite

APA:

Villano, M., Krieger, G., & Moreira, A. (2015). Ambiguities and Image Quality in Staggered SAR. In Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) (pp. 204-209). Institute of Electrical and Electronics Engineers Inc..

MLA:

Villano, Michelangelo, Gerhard Krieger, and Alberto Moreira. "Ambiguities and Image Quality in Staggered SAR." Proceedings of the 5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015 Institute of Electrical and Electronics Engineers Inc., 2015. 204-209.

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