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Meteo-marine parameters from the TS-X satellite on a near-real time basis and wave model forecast validation

Gebhardt, Claus P. and Lehner, Susanne and Pleskachevsky, Andrey and Jacobsen, Sven and Rosenthal, Wolfgang and Hoffmann, Peter and Kieser, Jens and Bruns, Thomas (2015) Meteo-marine parameters from the TS-X satellite on a near-real time basis and wave model forecast validation. In: Geophysical Research Abstracts. EGU General Assembly 2015, 12.-17. April 2015, Vienna, Austria.

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Official URL: http://meetingorganizer.copernicus.org/EGU2015/EGU2015-1631-2.pdf

Abstract

The TerraSAR-X satellite (TS-X), which was launched in 2007, hosts a state-of-the-art X-band Synthetic Aperture Radar (SAR). As a result of its relatively low orbit (ca. 500 km), it has improved properties against SAR-specific image distortion of the ocean surface. Being a SAR sensor, its observations are independent off sun light and cloud conditions. Meteo-marine parameters are provided on a near real time basis. Both sea state and wind conditions are derived from the radar images. This is accomplished by empirical retrieval algorithms. For the wind retrieval, the backscatter coefficients of radar scatterometers for different wind speeds and directions are utilised (XMOD2). For the wave retrieval, the empirical algorithm XWAVE has been developed as transformation of the radar images into two dimensional wave spectra. Spectral properties like the peak wavelength, peak period, and significant wave height are derived from the wave spectra. In our presentation, we give an overview on the TS-X wave and wind retrieval algorithms (XWAVE and XMOD2). The quality of the sea state results from TS-X is demonstrated by comparisons to collocated buoy measurements. In the German Bight, the forecast quality of the high-resolution coastal wave model CWAM of the German Meteorological Service (DWD) is validated using TS-X results. The comparison of the numerical model hindcasts with TS-X satellite data complements and extends the conventional validation by in-situ data. This is because of the large areal coverage and in-situ sensors cannot be easily deployed in certain regions, e.g. in locations with strong ship traffic.

Item URL in elib:https://elib.dlr.de/95450/
Document Type:Conference or Workshop Item (Speech)
Additional Information:published online, only abstract © Author(s) 2015. CC Attribution 3.0 License
Title:Meteo-marine parameters from the TS-X satellite on a near-real time basis and wave model forecast validation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gebhardt, Claus P.Claus.Gebhardt (at) dlr.deUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Pleskachevsky, AndreyAndrey.Pleskachevsky (at) dlr.deUNSPECIFIED
Jacobsen, SvenSven.Jacobsen (at) dlr.deUNSPECIFIED
Rosenthal, WolfgangWolfgang.Rosenthal (at) dlr.deUNSPECIFIED
Hoffmann, PeterPeter.Hoffmann (at) dwd.deUNSPECIFIED
Kieser, JensJens.Kieser (at) dwd.deUNSPECIFIED
Bruns, ThomasThomas.Bruns (at) dwd.deUNSPECIFIED
Date:2015
Journal or Publication Title:Geophysical Research Abstracts
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TerraSAR-X, synthetic aperture radar, sea state and wind analysis, comparison to buoy data, wave model validation
Event Title:EGU General Assembly 2015
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:12.-17. April 2015
Organizer:European Geosciences Union
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Bremen , Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Kaps, Ruth
Deposited On:27 Feb 2015 11:38
Last Modified:21 Dec 2015 18:37

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