Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model

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

2 Citations (Scopus)

Abstract

The Doppler shift of the backscattered radar signal from the sea surface can be used for determining the line-of-sight velocity of the scatterers and thus for measuring surface currents and ocean wave spectra. The bandwidth of the instantaneous Doppler spectrum, which is associated with the distribution of the line-of-sight velocity within the radar resolution cell, is a measure for the scene coherence time which enters into the SAR imaging mechanism for ocean scenes. Experimental results indicate that the measured Doppler shift can significantly exceed the values expected from simple first-order considerations. Furthermore, the Doppler bandwidth has been found to vary along long ocean waves, and a difference between the Doppler bandwidths for upwind and downwind looking radars has been observed. We present a new model for the computation of Doppler spectra which includes the hydrodynamic modulation of short waves by longer waves. The proposed model can reproduce the experimental results at least qualitatively at the present stage.

Original languageEnglish (US)
Title of host publicationInternational Geoscience and Remote Sensing Symposium (IGARSS)
PublisherIEEE
Pages729
Number of pages1
Volume2
StatePublished - 1994
Externally publishedYes
EventProceedings of the 1994 International Geoscience and Remote Sensing Symposium. Vol 4 (of 4) - Pasadena, CA, USA
Duration: Aug 8 1994Aug 12 1994

Other

OtherProceedings of the 1994 International Geoscience and Remote Sensing Symposium. Vol 4 (of 4)
CityPasadena, CA, USA
Period8/8/948/12/94

Fingerprint

ocean wave
backscatter
sea surface
Radar
Doppler effect
Water waves
radar
Bandwidth
wave spectrum
Composite materials
synthetic aperture radar
hydrodynamics
ocean
Hydrodynamics
Modulation
Imaging techniques
distribution
measuring

ASJC Scopus subject areas

  • Software
  • Geology

Cite this

Romeiser, R. (1994). Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model. In International Geoscience and Remote Sensing Symposium (IGARSS) (Vol. 2, pp. 729). IEEE.

Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model. / Romeiser, Roland.

International Geoscience and Remote Sensing Symposium (IGARSS). Vol. 2 IEEE, 1994. p. 729.

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

Romeiser, R 1994, Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model. in International Geoscience and Remote Sensing Symposium (IGARSS). vol. 2, IEEE, pp. 729, Proceedings of the 1994 International Geoscience and Remote Sensing Symposium. Vol 4 (of 4), Pasadena, CA, USA, 8/8/94.
Romeiser R. Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model. In International Geoscience and Remote Sensing Symposium (IGARSS). Vol. 2. IEEE. 1994. p. 729
Romeiser, Roland. / Doppler spectra of the radar backscatter from the sea surface obtained from a three-scale composite surface model. International Geoscience and Remote Sensing Symposium (IGARSS). Vol. 2 IEEE, 1994. pp. 729
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