Hydrodynamic ocean wave-radar modulation transfer functions obtained from a three-scale composite surface model

Roland Romeiser, Anke Schmidt, Volkmar Wismann, Werner Alpers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The modulation of the radar backscatter by long ocean waves can, to first order, be described by a linear modulation transfer function (MTF). The complex MTF can be separated into a part describing purely geometrical effects and the `hydrodynamic MTF' resulting from the modulation of short surface waves by longer waves. According to previous theories, the hydrodynamic MTF should be independent of the radar polarization. Experimental results show that this is not valid. Furthermore, the measured hydrodynamic MTFs for high radar frequencies (e.g., X-band) are often larger than expected. We show that these effects can be basically explained by a three-scale composite surface model, which takes into account the second-order modulation of the radar backscatter by intermediate-scale surface waves. Furthermore, the proposed model includes a modulation of the wind stress over the long surface waves.

Original languageEnglish (US)
Title of host publicationBetter Understanding of Earth Environment
EditorsSadao Fujimura
PublisherPubl by IEEE
Pages765-767
Number of pages3
ISBN (Print)0780312406
StatePublished - Dec 1 1993
Externally publishedYes
EventProceedings of the 13th Annual International Geoscience and Remote Sensing Symposium - Tokyo, Jpn
Duration: Aug 18 1993Aug 21 1993

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
Volume2

Other

OtherProceedings of the 13th Annual International Geoscience and Remote Sensing Symposium
CityTokyo, Jpn
Period8/18/938/21/93

ASJC Scopus subject areas

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

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  • Cite this

    Romeiser, R., Schmidt, A., Wismann, V., & Alpers, W. (1993). Hydrodynamic ocean wave-radar modulation transfer functions obtained from a three-scale composite surface model. In S. Fujimura (Ed.), Better Understanding of Earth Environment (pp. 765-767). (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2). Publ by IEEE.