Radar imaging mechanism of marine sand waves at very low grazing angle illumination

Hennings, Ingo and Herbers, Dagmar (2005) Radar imaging mechanism of marine sand waves at very low grazing angle illumination EARSeL eProceedings, 4 (2). pp. 226-240.

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Abstract

The investigations carried out between 2002-2004 during several field experiments within the Op-erational radar and optical mapping in monitoring hydrodynamic, morphodynamic and environ-mental parameters for coastal management project (OROMA) aimed to improve the effectiveness of new monitoring technologies such as shipborne imaging radars in coastal waters. The coastal monitoring radar of the GKSS Research Centre, Geesthacht, Germany, is based on a Kelvin Hughes RSR 1000 X-band (9.42 GHz) VV polarized river radar and was mounted on board the research vessel Ludwig Prandtl during the experiments in the Lister Tief, a tidal inlet of the German Bight in the North Sea. The important progress realized in this investigation is the availability of calibrated X-band radar data. Another central point of the study is to demonstrate the applicability of the quasi-specular scattering theory in combination with the weak hydrodynamic interaction the-ory for the radar imaging mechanism of the sea bed. It is shown that specular point scattering con-tributes significantly to the normalized radar cross section (NRCS) modulation due to marine sand waves. According to the theory quasi-specular scattering can be applied for wind speeds Uw ≤ 8 m s-1. Measured and simulated NRCS modulations caused by flood and ebb tide oriented marine sand waves have been compared and agree fairly well

Document Type: Article
Keywords: Geophysics; Marine sand waves; normalized radar cross section (NRCS) modulation; quasi-specular scattering theory; weak hydrodynamic interaction theory
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: No
ISSN: 1729-3782
Date Deposited: 03 Dec 2008 16:52
Last Modified: 06 Jul 2012 15:02
URI: http://eprints.uni-kiel.de/id/eprint/4013

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