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Ambiguities and Image Quality in Staggered SAR

Villano, Michelangelo and Krieger, Gerhard and 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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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.

Item URL in elib:https://elib.dlr.de/96973/
Document Type:Conference or Workshop Item (Speech)
Title:Ambiguities and Image Quality in Staggered SAR
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords: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.
Event Title:Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)
Event Location:Marina Bay Sands, Singapore
Event Type:international Conference
Event Start Date:1 September 2015
Event End Date:4 September 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > Radar Concepts
Deposited By: Villano, Dr.-Ing. Michelangelo
Deposited On:07 Jul 2015 11:53
Last Modified:24 Apr 2024 20:02

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