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Algorithm for sea surface wind retrieval from TerraSAR-X and TanDEM-X data

Li, Xiao-Ming and Lehner, Susanne (2014) Algorithm for sea surface wind retrieval from TerraSAR-X and TanDEM-X data. IEEE Transactions on Geoscience and Remote Sensing, 52 (5), pp. 2928-2939. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2013.2267780. ISSN 0196-2892.

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A Geophysical Model Function (GMF), denoted XMOD2, is developed to retrieve sea surface wind field from Xband TerraSAR-X/TanDEM-X (TS-X/TD-X) data. In contrast to the previously developed XMOD1, XMOD2 consists of a nonlinear GMF, and thus, it depicts the difference between upwind and downwind of the sea surface backscatter in X-band SAR imagery. By exploiting 371 collocations with in situ buoy measurements which are used as the tuning dataset together with analysis wind model results, the retrieved TS-X/TD-X sea surface wind speed using XMOD2 shows a close agreement with buoy measurements with a bias of -0.32 m/s, an RMSE of 1.44 m/s and a scatter index (SI) of 16.0%. Further validation using an independent dataset of 52 cases shows a bias of -0.17 m/s, an RMSE of 1.48 m/s, and SI of 17.0% comparing with buoy measurements. To apply XMOD2 to TS-X/TD-X data acquired at HH polarisation, we validate three X-band SAR Polarisation Ratio (PR) models that were tuned using TS-X dual polarisation data by comparing the retrieved sea surface wind speed with buoy measurements.

Item URL in elib:https://elib.dlr.de/86135/
Document Type:Article
Title:Algorithm for sea surface wind retrieval from TerraSAR-X and TanDEM-X data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Li, Xiao-MingXiao.Li (at) dlr.deUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Date:May 2014
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/TGRS.2013.2267780
Page Range:pp. 2928-2939
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Algorithm development, X-band SAR, sea surface wind
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 - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Li, Xiao Ming
Deposited On:09 Dec 2013 09:48
Last Modified:31 Jul 2019 19:43

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