Gisinger, Christoph und Libert, Ludivine und Marinkovic, Petar und Krieger, Lukas und Larsen, Yngvar und Valentino, Antonio und Breit, Helko und Balss, Ulrich und Suchandt, Steffen und Nagler, Thomas und Eineder, Michael und Miranda, Nuno (2022) The Extended Timing Annotation Dataset for Sentinel-1 - Product Description and First Evaluation Results. IEEE Transactions on Geoscience and Remote Sensing, 60, Seiten 1-22. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2022.3194216. ISSN 0196-2892.
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Offizielle URL: https://ieeexplore.ieee.org/document/9841598
Kurzfassung
This article introduces the extended timing annotation dataset (ETAD) product for Sentinel-1 (S-1) which was developed in a joint effort of German Aerospace Center (DLR) and European Space Agency (ESA). It allows to correct range and azimuth timing of S-1 images for geophysical effects and for inaccuracies in synthetic aperture radar (SAR) image focusing. In combination with the precise orbit solution, these effects determine the absolute geolocation accuracy of S-1 SAR images and the relative collocation accuracy of repeat pass image stacks. ETAD contains the gridded timing corrections for the tropospheric and ionospheric path delays, the tidal-based surface displacements, and the SAR processing effects, all of which are computed for each data taken using standard models from geodesy and auxiliary atmospheric data. The ETAD product helps S-1 users to significantly improve the geolocation accuracy of the S-1 SAR products to better than 0.2 m and offers a potential solution for correcting large-scale interferometric phase variations. The product layout and product generation are described schematically. This article also reports first the results for different SAR techniques: first, the improvement in geolocation accuracy down to a few centimeters by verification of accurately surveyed corner reflector positions in the range–azimuth plane; second, the well-established offset-tracking technique, which is used for systematic ice velocity monitoring of ice sheets and glaciers, where ETAD can reduce velocity biases down to subcentimetric values; and third, the correction of atmospheric phase contributions in wide-area interferograms used for national and European ground motion services. These early results proof the added value of the ETAD corrections and that the product design is well-suited to be integrated into the processing flows of established SAR applications such as absolute ranging of targets, speckle/feature tracking, and interferometry.
elib-URL des Eintrags: | https://elib.dlr.de/188080/ | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Titel: | The Extended Timing Annotation Dataset for Sentinel-1 - Product Description and First Evaluation Results | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | August 2022 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Erschienen in: | IEEE Transactions on Geoscience and Remote Sensing | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Band: | 60 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1109/TGRS.2022.3194216 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-22 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Verlag: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||||||||||||||||||||||||||||||||||||||
ISSN: | 0196-2892 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Stichwörter: | Atmospheric phase screen, glaciology, imaging geodesy, InSAR, ionospheric phase screen, natural hazards, radar remote sensing, SAR geodesy, Sentinel-1, speckle tracking, synthetic aperture radar | ||||||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - SAR-Methoden | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Methodik der Fernerkundung > SAR-Signalverarbeitung | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Gisinger, Christoph | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 07 Sep 2022 08:21 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 28 Jun 2023 13:56 |
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