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Validation of SRTM-Derived Surface Currents off the Dutch Coast by Numerical Circulation Model Results

Romeiser, Roland and Breit, Helko and Eineder, Michael and Runge, Hartmut and Flamant, Pierre and Jong, Karin and Vogelzang, Jur (2003) Validation of SRTM-Derived Surface Currents off the Dutch Coast by Numerical Circulation Model Results. In: Proceedings of IGARSS'03, CD-ROM. IGARSS 2003, Toulouse.

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Abstract

The feasibility of exploiting the along-track separation of 7 m between the two X band antennas of SRTM for ocean current measurements was already demonstrated by us at IGARSS 2002: We presented an SRTM image of the Dutch Waddenzee with clear phase variations in water-covered areas, which could be converted into line-of-sight current variations by about 1.3 m/s. A comparison with a current map from a tidal atlas showed good qualitative agreement, but digital reference data for a quantitative validation of the SRTM results were not available. In this work we present a detailed comparison of the SRTM data with simulated current fields from the numerical circulation model KUSTWAD. We obtain an overall correlation of 0.558, a regression coefficient of 1.011, and an rms difference between SRTM and KUSTWAD currents of 0.24 m/s. Furthermore, we analyze the correlation of spatial variations in the measured and simulated current fields on different length scales. We find that SRTM can resolve the current variations which are relevant to KUSTWAD down to scales on the order of 1 km.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Validation of SRTM-Derived Surface Currents off the Dutch Coast by Numerical Circulation Model Results
Authors:
AuthorsInstitution or Email of Authors
Romeiser, RolandUni Hamburg, Inst. of Oceanography
Breit, HelkoUNSPECIFIED
Eineder, MichaelUNSPECIFIED
Runge, HartmutUNSPECIFIED
Flamant, PierreUniversity of Hawaii
Jong, KarinKNMI
Vogelzang, JurKNMI
Date:2003
Journal or Publication Title:Proceedings of IGARSS'03
Volume:CD-ROM
Editors:
EditorsEmail
IEEE, UNSPECIFIED
Status:Published
Keywords:SRTM, along track interferometry, ATI, ocean currents
Event Title:IGARSS 2003, Toulouse
Organizer:IEEE
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):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Cornelia Roehl
Deposited On:09 May 2006
Last Modified:06 Jan 2010 22:18

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