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Klenk, Patrick and Reimann, Jens and Schwerdt, Marco (2018) Impacts of Expectable Large Deployable Reflector Deformations on Digital Beamforming. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR, pp. 1070-1073. European Conference on Synthetic Aperture Radar (EUSAR), 2018-06-05 - 2018-06-07, Aachen, Germany. ISBN 978-3-8007-4636-1. ISSN 2197-4403.
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Official URL: https://ieeexplore.ieee.org/abstract/document/8438176
Abstract
Upcoming radar missions for Earth observation focus on longer wavelengths in L- or even P-band. Operationally, these instruments will be constructed as an antenna feed array paired with large deployable reflectors (LDR) to achieve highly versatile instruments and high-gain antenna beams at realizable cost. Compared to current planar array based systems, these upcoming missions face a slew of novel challenges. One major concern is the impact of potential LDR distortions at different timescales on receive beams, calculated based on digital beamforming techniques. In this paper, we discuss the impacts of expected LDR surface distortions on maximum beam gain and beam pointing based upon a potential Tandem-L instrument geometry for a legacy LDR with a diameter of 12 m. We find that deployment uncertainties have a notable effect, while inter-orbit thermal distortions may not noticeably influence gain and pointing of the calculated receive beams.
| Item URL in elib: | https://elib.dlr.de/119717/ | ||||||||||||||||
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| Document Type: | Conference or Workshop Item (Poster) | ||||||||||||||||
| Title: | Impacts of Expectable Large Deployable Reflector Deformations on Digital Beamforming | ||||||||||||||||
| Authors: |
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| Date: | 1 June 2018 | ||||||||||||||||
| Journal or Publication Title: | Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| Page Range: | pp. 1070-1073 | ||||||||||||||||
| ISSN: | 2197-4403 | ||||||||||||||||
| ISBN: | 978-3-8007-4636-1 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Large-Deployable Reflector, LDR, Digital Beamforming, DBF, Tandem-L, TDL, antenna model, future SAR missions, calibration, pointing, antenna pointing, LDR distortion, simulation | ||||||||||||||||
| Event Title: | European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||||||
| Event Location: | Aachen, Germany | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Dates: | 2018-06-05 - 2018-06-07 | ||||||||||||||||
| 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 - SAR missions | ||||||||||||||||
| Location: | Oberpfaffenhofen | ||||||||||||||||
| Institutes and Institutions: | Microwaves and Radar Institute > Spaceborne SAR Systems | ||||||||||||||||
| Deposited By: | Klenk, Dr. Patrick | ||||||||||||||||
| Deposited On: | 23 Apr 2018 09:16 | ||||||||||||||||
| Last Modified: | 26 Nov 2021 19:00 |
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