Queiroz de Almeida, Felipe and Krieger, Gerhard (2018) A Novel High-Resolution Wide-Swath SAR Imaging Mode Employing Multichannel Slow PRI Variation. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR. European Conference on Synthetic Aperture Radar (EUSAR), 2018-06-04 - 2018-06-07, Aachen, Germany. ISSN 2197-4403.
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Abstract
High resolution and wide swath imaging are conflicting requirements in the design of spaceborne synthetic aperture radar (SAR) systems. Several studies have shown that this fundamental conflict can be resolved by advanced instrument modes and architectures employing multiple receive channels in elevation and/or azimuth. This paper introduces a new high-resolution wide-swath SAR imaging mode that uses multiple elevation and azimuth beams in combination with a slow variation of the pulse repetition interval (PRI). It is shown that this new mode enables the development of a highly performant SAR system with a rather compact antenna. As an example, the design of an L-band system is presented that is capable of imaging a 400 km wide swath with an azimuth resolution of 5 m in single polarization. A detailed analysis reveals that an excellent performance is achieved by combining a digital feed with 3 azimuth and 30 elevation channels using an unfurlable reflector that spans a diameter of 12 m. If compared to the staggered SAR mode of Tandem-L, which will employ a reflector with a diameter of 15 m, the required antenna aperture is reduced in the new mode by more than 35 %. Moreover, the same architecture enables the operation in a multichannel staggered SAR mode, which allows for the mapping of a 200 km wide swath with an even higher azimuth resolution of less than 2.5 m in a fully polarimetric mode.
Item URL in elib: | https://elib.dlr.de/119283/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | A Novel High-Resolution Wide-Swath SAR Imaging Mode Employing Multichannel Slow PRI Variation | ||||||||||||
Authors: |
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Date: | 2018 | ||||||||||||
Journal or Publication Title: | Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
ISSN: | 2197-4403 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | High-resolution Wide-Swath SAR Digital Beamforming Slow PRI Variation | ||||||||||||
Event Title: | European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||
Event Location: | Aachen, Germany | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Start Date: | 4 June 2018 | ||||||||||||
Event End Date: | 7 June 2018 | ||||||||||||
Organizer: | VDE | ||||||||||||
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 > Radar Concepts | ||||||||||||
Deposited By: | Queiroz de Almeida, Felipe | ||||||||||||
Deposited On: | 26 Mar 2018 10:49 | ||||||||||||
Last Modified: | 24 Apr 2024 20:23 |
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