elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Coastal modelling topography data by waterline retrieval from Sentinel-1 satellite acquisitions: from method development to a Near Real Time service

Wiehle, Stefan und Pleskachevsky, Andrey und Jacobsen, Sven und Schwarz, Egbert und Daedelow, Holger und Krause, Detmar (2018) Coastal modelling topography data by waterline retrieval from Sentinel-1 satellite acquisitions: from method development to a Near Real Time service. COMOD 2018, 2018-02-22 - 2018-02-23, Hamburg, Germany.

[img] PDF
3MB

Offizielle URL: https://www.io-warnemuende.de/comod2018.html

Kurzfassung

The automatic daily processing of coastlines from Sentinel-1 satellite data for updating the bathymetry to support modelling as part of a Near Real Time chain is being developed. In shallow waters, the physical processes caused by the interaction between waves, currents and the sea bottom become important and are crucial for modelling, requiring current and accurate bathymetry data. The spatial properties of sea state and currents change strongly in coastal areas and especially in the Wadden Sea at the Danish, German and Dutch North Sea coast with large areas of intertidal flats. The morphodynamics of seabed structures are significant in such littoral zones; the soft seabed can change within days during severe storms. Data from past measurement campaigns, which are very expensive using ship soundings and airborne LIDAR scanning, deprecates quickly as the positions of islands, sandbanks or tidal inlets change. Acquisitions from the Sentinel-1 (S1) Synthetic Aperture Radar (SAR) satellites cover most coasts worldwide. With two satellites currently in orbit, the acquisition interval is at most 6 days at the equator and almost daily in our latitudes. The Interferometric Wide Swath (IW) mode covers lands and coastal waters with a swath width of 250km and an image resolution of 10m. In contrast to optical satellites, SAR acquisitions are independent of illumination and cloud cover; hence, they deliver new images very reliably. The DLR satellite ground station in Neustrelitz receives these data and processes and delivers them in Near Real Time (NRT), usually within 20 minutes after acquisition. We have developed automated algorithms to retrieve the waterline from SAR images. In the tidal flat areas of the Wadden Sea, analyzing time series of acquisitions at similar tidal states allows estimating rates of change and sediment transport; a combination of several images acquired within a short time frame at different tidal states allows estimating the topography. Our algorithms for Sentinel-1 SAR images offer a quick and cheap way to spot ongoing processes, verify modelling results and identify regions of major change for future measurement campaigns.

elib-URL des Eintrags:https://elib.dlr.de/118280/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Coastal modelling topography data by waterline retrieval from Sentinel-1 satellite acquisitions: from method development to a Near Real Time service
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Wiehle, StefanStefan.Wiehle (at) dlr.dehttps://orcid.org/0000-0003-1476-6261NICHT SPEZIFIZIERT
Pleskachevsky, Andreyandrey.pleskachevsky (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Jacobsen, SvenSven.Jacobsen (at) dlr.dehttps://orcid.org/0000-0003-4810-4186NICHT SPEZIFIZIERT
Schwarz, EgbertEgbert.Schwarz (at) dlr.dehttps://orcid.org/0000-0003-2901-234XNICHT SPEZIFIZIERT
Daedelow, HolgerHolger.Daedelow (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Krause, DetmarDetmar.Krause (at) dlr.dehttps://orcid.org/0009-0004-4353-4595NICHT SPEZIFIZIERT
Datum:22 Februar 2018
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Oceanography, SAR, coastal modelling, topography, waterline retrieval, Sentinel-1, NRT, Near Real Time service
Veranstaltungstitel:COMOD 2018
Veranstaltungsort:Hamburg, Germany
Veranstaltungsart:nationale Konferenz
Veranstaltungsbeginn:22 Februar 2018
Veranstaltungsende:23 Februar 2018
Veranstalter :KDM Working Group on “Coastal Ocean Modelling”
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: Bremen , Neustrelitz , Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > SAR-Signalverarbeitung
Deutsches Fernerkundungsdatenzentrum > Nationales Bodensegment
Hinterlegt von: Kaps, Ruth
Hinterlegt am:16 Feb 2018 10:34
Letzte Änderung:24 Apr 2024 20:22

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.