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An algorithm for the retrieval of sea surface wind fields using X-band TerraSAR-X data

Ren, Yongzheng and Lehner, Susanne and Brusch, Stephan and Li, Xiao-Ming and He, Mingxia (2012) An algorithm for the retrieval of sea surface wind fields using X-band TerraSAR-X data. International Journal of Remote Sensing, 33 (23), pp. 7310-7336. Taylor&Francis. DOI: 10.1080/01431161.2012.685977.

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TerraSAR-X (TS-X) is a new, fully polarized X-band synthetic aperture radar (SAR) satellite, which is a successor of the Spaceborne Imaging Radar X-band Synthetic Aperture Radar (SIR-X-SAR) and the SRTM. TS-X has provided high-quality image products over land and oceans for scientific and commercial users since its launch in June 2007. In this article, a new geophysical model function (GMF) is presented to retrieve sea surface wind speeds at a height of 10 m (U 10) based on TS-X data obtained with VV polarization in the ScanSAR, StripMap and Spotlight modes. The X-band GMF was validated by comparing the retrieved wind speeds from the TS-X data with in situ observations, the high-resolution limited area model (HIRLAM) and QuikSCAT scatterometer measurements. The bias and root mean square (RMS) values were 0.03 and 2.33 m s−1, respectively, when compared with the co-located wind measurements derived from QuikSCAT. To apply the newly developed GMF to the TS-X data obtained in HH polarization, we analysed the C-band SAR polarization models and extended them to the X-band SAR data. The sea surface wind speeds were retrieved using the X-band GMF from pairs of TS-X images obtained in dual-polarization mode (i.e. VV and HH). The retrieved results were also validated by comparing with QuikSCAT measurements and the results of the German Weather Service (DWD) atmospheric model. The obtained RMS was 2.50 m s−1 when compared with the co-located wind measurements derived from the QuikSCAT, and the absolute error was 2.24 m s−1 when compared with DWD results.

Document Type:Article
Title:An algorithm for the retrieval of sea surface wind fields using X-band TerraSAR-X data
AuthorsInstitution or Email of Authors
Ren, YongzhengCEODE, CAS, China
Lehner, SusanneUNSPECIFIED
Brusch, StephanUNSPECIFIED
He, MingxiaCEODE, CAS, China
Date:10 July 2012
Journal or Publication Title:International Journal of Remote Sensing
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 7310-7336
Series Name:Special Issue: Pan Ocean Remote Sensing: Connecting Regional Impacts to Global Environmental Change
Keywords:SAR, TerraSAR-X, X-band
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Marine Remote Sensing
Deposited By: Bärbel Bolowski
Deposited On:18 Jul 2012 07:41
Last Modified:26 Mar 2013 13:40

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