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Simultaneous Measurements by Advanced SAR and Radar Altimeter on Potential Improvement of Ocean Wave Model Assimilation

Li, Xiao-Ming and Lehner, Susanne and Bruns, Thomas (2014) Simultaneous Measurements by Advanced SAR and Radar Altimeter on Potential Improvement of Ocean Wave Model Assimilation. IEEE Transactions on Geoscience and Remote Sensing, 52 (5), pp. 2508-2518. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2013.2262137. ISSN 0196-2892.

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6522453


Simultaneous measurements of significant wave height (SWH) obtained from two independent active microwave sensors of Radar Altimeter 2 (RA-2) and Advanced Synthetic Aperture Radar (ASAR) onboard the ENVIronmental SATellite (ENVISAT) are used for a global verification of ocean wave models (WAMs). In the present study, SWH is retrieved from ASAR wave mode data using the empirical algorithm called C-band WAVE algorithm for ENVISAT, which is capable of representing total SWH irrespective of the cutoff of SAR. Comparisons of two radar measurements with the reanalyses ERA-Interim model (with assimilation of RA-2 measurements) and the German operational WAM (Deutscher Wetterdienst Global Sea wave Model, without assimilation before 2008) show that both WAMs agree well with ASAR and RA-2 measurements. However, the discrepancies of agreement indicate to which extent that the assimilation of RA-2 measurements can improve the performance of WAMs. Moreover, differences in the comparisons of ASAR and RA-2 measurements with the same WAM of ERA-Interim reveal that, although assimilation of RA-2 significantly improves the accuracy of model on grids near the RA-2 tracks, the improvement decreases along with the increase of distance between model grids and RA-2 tracks.

Item URL in elib:https://elib.dlr.de/82764/
Document Type:Article
Additional Information:INSPEC Accession Number: 14131319
Title:Simultaneous Measurements by Advanced SAR and Radar Altimeter on Potential Improvement of Ocean Wave Model Assimilation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Li, Xiao-MingXiao.Li (at) dlr.deUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Bruns, ThomasThomas.Bruns (at) dwd.deUNSPECIFIED
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.2013.2262137
Page Range:pp. 2508-2518
EditorsEmailEditor's ORCID iD
Plaza, Antonio J.University of Extremadura, SpainUNSPECIFIED
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Radar Altimeter, sea surface wave, SAR, wave modeling
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 Maritime Anwendungen GMES/Koordination (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Li, Xiao Ming
Deposited On:12 Jun 2013 08:36
Last Modified:31 Jul 2019 19:41

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