Villano, Michelangelo und Krieger, Gerhard und Moreira, Alberto (2015) Ambiguities and Image Quality in Staggered SAR. In: 5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015. Asia-Pacific Conference on Synthetic Aperture Radar (APSAR), 2015-09-01 - 2015-09-04, Marina Bay Sands, Singapore. doi: 10.1109/APSAR.2015.7306189.
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Kurzfassung
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.
elib-URL des Eintrags: | https://elib.dlr.de/96973/ | ||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||
Titel: | Ambiguities and Image Quality in Staggered SAR | ||||||||
Autoren: |
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Datum: | 2015 | ||||||||
Erschienen in: | 5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015 | ||||||||
Open Access: | Ja | ||||||||
In SCOPUS: | Ja | ||||||||
In ISI Web of Science: | Nein | ||||||||
DOI: | 10.1109/APSAR.2015.7306189 | ||||||||
Stichwörter: | Synthetic aperture radar (SAR), high-resolution wide-swath (HRWS) imaging, staggered SAR, ambiguities, range ambiguity-to-signal ratio (RASR), azimuth ambiguity-to-signal-ratio (AASR), Tandem-L. | ||||||||
Veranstaltungstitel: | Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) | ||||||||
Veranstaltungsort: | Marina Bay Sands, Singapore | ||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||
Veranstaltungsbeginn: | 1 September 2015 | ||||||||
Veranstaltungsende: | 4 September 2015 | ||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||
Standort: | Oberpfaffenhofen | ||||||||
Institute & Einrichtungen: | Institut für Hochfrequenztechnik und Radarsysteme Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte |
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