Younis, Marwan and Metzig, Robert and Krieger, Gerhard and Klein, Rainer (2006) Performance Prediction and Verification for Bistatic SAR Synchronization Link. In: Proceedings of European Conference on Synthetic Aperture Radar (EUSAR), p. 4. European Conference on Synthetic Aperture Radar (EUSAR), 2006-05-16 - 2006-05-18, Dresden, Germany.
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Abstract
Bistatic SAR systems have a high potential for scientific, commercial and security applications. One of the benefits is the possibility to generate highly accurate digital elevation models using bistatic interferometry. Examples for proposed bi- and multi-static satellite missions with interferometric capabilities are TanDEM-X and Cartwheel. Both are based on radar instruments placed on different spacecrafts, which gives rise to several technical challenges for the system realization. A factor which may severely degrade the performance of a bistatic SAR is the phase instability of the two oscillators involved. Investigations have shown, that, unless highly stable oscillators are used, the oscillators phase noise has to be compensated; this is possible through the processed SAR data in combination with ground control points, or by establishing a synchronization link to directly exchange signals providing information on the oscillator phase noise. The later method is based on recording the received demodulated phases, which are then used to derive a compensation signal to correct the SAR data. The paper describes a possible configuration for the synchronization link, sharing hardware components with the SAR instrument. Such a system is currently intended for the TanDEM-X mission. The resulting restrictions on the synchronization scheme, timing, and accuracy are investigated. The statistical properties of the compensation signal are used to derive a figure-of-merit for synchronization performance. The focus is on the influence of the synchronization link RF hardware on the quality of the derived compensation signal. Therefore a hardware setup is realized and characterized to obtain realistic data. Further, a simulation tool is implemented to predict the performance. The simulation tool is based on a synchronization link hardware model which can use measurement data as an input. Finally, the complete synchronization process is verified by measurements using the test hardware.
Item URL in elib: | https://elib.dlr.de/43730/ | ||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||||||
Title: | Performance Prediction and Verification for Bistatic SAR Synchronization Link | ||||||||||||||||||||
Authors: |
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Date: | 17 May 2006 | ||||||||||||||||||||
Journal or Publication Title: | Proceedings of European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||||||||||
Refereed publication: | No | ||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||
Page Range: | p. 4 | ||||||||||||||||||||
Editors: |
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Status: | Published | ||||||||||||||||||||
Keywords: | Bistatic synthetic aperture radar, compensation phase, oscillator noise, phase errors, phase noise, phase referencing, phase synchronization, synchronization link, synthetic aperture radar | ||||||||||||||||||||
Event Title: | European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||||||||||
Event Location: | Dresden, Germany | ||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||
Event Start Date: | 16 May 2006 | ||||||||||||||||||||
Event End Date: | 18 May 2006 | ||||||||||||||||||||
Organizer: | VDE | ||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||||||
HGF - Program Themes: | W EO - Erdbeobachtung | ||||||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||||||
DLR - Program: | W EO - Erdbeobachtung | ||||||||||||||||||||
DLR - Research theme (Project): | W - Vorhaben Entwicklung eines Mini-SAR (old) | ||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||
Institutes and Institutions: | Microwaves and Radar Institute Microwaves and Radar Institute > Spaceborne SAR Systems | ||||||||||||||||||||
Deposited By: | Younis, Dr.-Ing. Marwan | ||||||||||||||||||||
Deposited On: | 23 May 2006 | ||||||||||||||||||||
Last Modified: | 24 Apr 2024 19:05 |
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