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Summary of Proposal OCE1070

TitleDeveloping and validation of spectral and individual ocean wave parameters
Investigator Bruck, Miguel - DLR, IMF-GW
Team Member
Mr. Bruck, Miguel - DLR, IMF-GW
Dr. Lehner, Susanne - DLR, IMF-GW
Dr. Pontes, Teresa - Laboratório Nacional de Energia e Geologia, Renewable Energy Department
Dr. Brusch, Stephan - DLR, IMF-GW
Dr. da Silva, José - Faculdade de Ciencias da Universidade de Lisboa, Oceanographic institute
Dr. Bruns, Thomas - Deutscher Wetterdienst (DWD), JCOMM,SFSPA,ETWS
SummaryOcean observation and wave measurement are done using different measurement devices, buoys and remote sensing devices like altimeters, marine radars and SAR. Buoys are mostly located nearshore, and their number is limited, especially in the Southern Hemisphere, so mostof the ocean is not covered by buoys. Storms in open sea will not be measured by buoys. Another drawback of buoys is the fact that they are point measurement devices. In deep water in normal weather conditions the ocean does not change much within some kilometers, but in coastal areas and near islands this is untrue. Wave conditions in coastal areas can change drastically in a few meters due to bathymetry, shadow effects and interference. Remote sensing instruments like altimeters are also point measurement devices like the buoys, but they only provide useful information about wave height, and they only measure in the open ocean. SAR is a sensor that can observe and measure ocean waves and give information not only about the main sea state information parameters as wave height and period, but also information about wave direction and the wave spectral shape. Spaceborne SAR instrument is the only instrument that can observe any location on the ocean, and TerraSAR-X (TSX) due to high resolution is especially suitable to observe high variability ocean areas like coastal areas or near islands. The main goal of this proposal is to develop algorithms to derive sea state information, especially wave height,from TSX SAR data. TSX SAR acquisitions will be taken mostly over buoy locations but also in open ocean where storms occurs.Sea state information given by buoys, wave models, altimeters, and other SAR sensors will be used to develop, tune and validate an algorithm to derive sea state information.

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