Klenk, Patrick and Reimann, Jens and Huber, Sigurd and Schwerdt, Marco (2020) Contingency Mitigation Aspects for Reflector Based Satellite SAR Systems. In: European Conference on Antennas and Propagation: EuCAP 2006. European Conference on Antennas and Propagation (EuCAP), 2020-03-15 - 2020-03-20, Copenhagen, Denmark.
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Abstract
Contingency mitigation, especially with respect to potential failures of Transmit-Receive Modules (TRMs) is a critical issue for SAR system concepts based upon planar phased array antenna fed large-deployable reflector (LDR) instruments. One promising approach is defocusing the LDR from the usually employed paraboloid shape. This opens a trade-space which has to be carefully investigated. Based on the current instrument and spacecraft geometry of Tandem-L we here assess the potential of reflector shaping to mitigate potential TRM failures. In particular we discuss the potential for re-optimization of the transmit pattern in such a contingency case. We find that for the defocused reflector, the impact of a potential TRM failure on the transmit pattern can be largely mitigated with acceptable impacts on nominal operations.
Item URL in elib: | https://elib.dlr.de/129701/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Poster) | |||||||||||||||
Title: | Contingency Mitigation Aspects for Reflector Based Satellite SAR Systems | |||||||||||||||
Authors: |
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Date: | March 2020 | |||||||||||||||
Journal or Publication Title: | European Conference on Antennas and Propagation: EuCAP 2006 | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | No | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | Yes | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | antenna radiation patterns, instrument performance, digital beamforming, digital beamforming techniques, DBF, reflector shaping, defocused, antenna model, antenna pointing, contingency mitigation, feed failures, feed element failures, large-deployable reflector, LDR, MVDR, reflector antennas, mesh reflector antennas, Earth observation, Synthetic-Aperture Radar, SAR, spaceborne SAR, satellite SAR, Tandem-L | |||||||||||||||
Event Title: | European Conference on Antennas and Propagation (EuCAP) | |||||||||||||||
Event Location: | Copenhagen, Denmark | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 2020-03-15 - 2020-03-20 | |||||||||||||||
Organizer: | EURAAP | |||||||||||||||
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 > Spaceborne SAR Systems | |||||||||||||||
Deposited By: | Klenk, Dr. Patrick | |||||||||||||||
Deposited On: | 21 Oct 2019 11:30 | |||||||||||||||
Last Modified: | 26 Nov 2021 19:00 |
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