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

Roland Romeiser, Helko Breit, Michael Eineder, Hartmut Runge, Pierre Flament, Karin De Jong, Jur Vogelzang

Research output: Contribution to conferencePaper

9 Scopus citations

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.

Original languageEnglish (US)
Pages3085-3087
Number of pages3
StatePublished - Nov 24 2003
Externally publishedYes
Event2003 IGARSS: Learning From Earth's Shapes and Colours - Toulouse, France
Duration: Jul 21 2003Jul 25 2003

Other

Other2003 IGARSS: Learning From Earth's Shapes and Colours
CountryFrance
CityToulouse
Period7/21/037/25/03

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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    Romeiser, R., Breit, H., Eineder, M., Runge, H., Flament, P., De Jong, K., & Vogelzang, J. (2003). Validation of SRTM-Derived Surface Currents off the Dutch Coast by Numerical Circulation Model Results. 3085-3087. Paper presented at 2003 IGARSS: Learning From Earth's Shapes and Colours, Toulouse, France.