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Rodriguez Cassola, Marc and Prats-Iraola, Pau and De Zan, Francesco and Scheiber, Rolf and Reigber, Andreas and Geudtner, Dirk and Moreira, Alberto (2015) Doppler-related Distortions in TOPS SAR Images. IEEE Transactions on Geoscience and Remote Sensing, 53 (1), pp. 25-35. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2014.2313068. ISSN 0196-2892.
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Abstract
A direct consequence of the TOPS acquisition geometry and the steering in azimuth of the antenna is the timevarying Doppler centroid within bursts. If this fact is not properly accommodated during SAR image formation, undesired distortions in both azimuth and range dimensions of the focused SAR images may appear. Azimuth distortions are caused by the local mismatch of both squint and topography. Range distortions arise from the inaccurate accommodation of the intrapulse motion of the platform, usually known as the stop-and-go approximation. Conventional spaceborne SAR image formation schemes will be, in general, unable to provide accurate TOPS SAR images. These distortions are discussed and evaluated for exemplary low-Earthorbit SAR scenarios. Compensation strategies are presented and validated with TerraSAR-X TOPS data. A discussion of the potential impact on the Sentinel-1 interferometric-wide-swath and extra-wide-swath modes (i.e., TOPS) is also given.
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| Document Type: | Article | ||||||||||||||||||||||||||||||||
| Additional Information: | ©2014 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE | ||||||||||||||||||||||||||||||||
| Title: | Doppler-related Distortions in TOPS SAR Images | ||||||||||||||||||||||||||||||||
| Authors: |
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| Date: | January 2015 | ||||||||||||||||||||||||||||||||
| 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: | 53 | ||||||||||||||||||||||||||||||||
| DOI: | 10.1109/TGRS.2014.2313068 | ||||||||||||||||||||||||||||||||
| Page Range: | pp. 25-35 | ||||||||||||||||||||||||||||||||
| Publisher: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||||||||||||||||||
| ISSN: | 0196-2892 | ||||||||||||||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||||||||||||||
| Keywords: | Burst-mode acquisitions, Sentinel-1, spaceborne SAR missions, synthetic aperture radar (SAR), Terrain Observation with Progressive Scans (TOPS), TerraSAR-X (TerraSAR-X), wide-swath SAR modes. | ||||||||||||||||||||||||||||||||
| 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 - Aircraft SAR | ||||||||||||||||||||||||||||||||
| Location: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||
| Institutes and Institutions: | Microwaves and Radar Institute > SAR Technology | ||||||||||||||||||||||||||||||||
| Deposited By: | Rodriguez Cassola, Marc | ||||||||||||||||||||||||||||||||
| Deposited On: | 08 Dec 2014 08:42 | ||||||||||||||||||||||||||||||||
| Last Modified: | 28 Nov 2023 09:07 |
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