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Krieger, Gerhard and De Zan, Francesco (2014) Relativistic Effects in Bistatic Synthetic Aperture Radar. IEEE Transactions on Geoscience and Remote Sensing, 52 (2), pp. 1480-1488. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2013.2251640. ISSN 0196-2892.
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Abstract
This paper addresses relativistic effects in bistatic and multistatic SAR systems and missions. It is shown that the use of different reference frames for bistatic SAR processing and bistatic radar synchronization is prone to notable phase and time errors. These errors are a direct con-sequence of the relativity of simultaneity and can be explained in good approximation within the framework of Einstein’s special theory of relativity. Using the invariance of the spacetime interval, an analytic expression is derived which shows that the time and phase errors increase with increasing along-track distance between the satellites. The predicted errors are in excel-lent agreement with measurements from TanDEM-X and provide a satisfactory explanation for previously observed DEM height offsets that exceeded +- 10 m. Consideration of the unex-pected relativistic effects is essential for accurate DEM generation in TanDEM-X and has in the meantime been implemented in the operational processing chain.
| Item URL in elib: | https://elib.dlr.de/82374/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | Relativistic Effects in Bistatic Synthetic Aperture Radar | |||||||||
| Authors: |
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| Date: | February 2014 | |||||||||
| Journal or Publication Title: | IEEE Transactions on Geoscience and Remote Sensing | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | Yes | |||||||||
| Volume: | 52 | |||||||||
| DOI: | 10.1109/TGRS.2013.2251640 | |||||||||
| Page Range: | pp. 1480-1488 | |||||||||
| Publisher: | IEEE - Institute of Electrical and Electronics Engineers | |||||||||
| ISSN: | 0196-2892 | |||||||||
| Status: | Published | |||||||||
| Keywords: | Relativity, Simultaneity, TanDEM-X, Bistatic, Multistatic, Synchronization, Interferometry, Radargrammetry, Synthetic Aperture Radar (SAR) | |||||||||
| 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 Technologie Experimente TSX und TDX (old), R - Projekt TanDEM-X (old), R - Vorhaben Tandem-L Vorstudien (old), R - Development of a mini-SAR | |||||||||
| Location: | Oberpfaffenhofen | |||||||||
| Institutes and Institutions: | Microwaves and Radar Institute > Radar Concepts Microwaves and Radar Institute | |||||||||
| Deposited By: | Krieger, Dr.-Ing. Gerhard | |||||||||
| Deposited On: | 16 May 2013 09:46 | |||||||||
| Last Modified: | 31 Jul 2019 19:40 |
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