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Radar Remote Sensing of Ocean Waves - Global Mapping of Mean and Peak Wave Parameters Extracted from SAR Cross Spectra

Hoja, Danielle (2004) Radar Remote Sensing of Ocean Waves - Global Mapping of Mean and Peak Wave Parameters Extracted from SAR Cross Spectra. Dissertation. DLR-Forschungsbericht. 31, 271 S.

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Abstract

Satellite remote sensing offers different methods for acquiring information on the open ocean and coastal regions. The synthetic aperture radar (SAR) is the only instrument capable of providing high-resolution 2D sea surface spectra on a global and continuous scale. Besides spectral sea state information, SAR image data (imagettes) of the sea surface offer plenty of additional information, especially about atmospheric effects. The aim of the present thesis is to investigate the performance of the ocean wave model WAM in comparison to marine parameters extracted from complex ERS-2 SAR data, as well as to investigate severe weather situations, e.g., hurricanes, with SAR imagettes and computed spectra. For this purpose, observed SAR cross spectra and modelled WAM ocean wave spectra are analysed. Typical sea state parameters like significant wave height and wavelength are retrieved from the spectra and evaluated. Tools generating global statistics and maps to analyse and present the information contained in the spectra are developed and applied to the collocated data sets. A new method to detect inconsistencies between observation and model is developed by forward mapping of modelled wave spectra into cross spectra for an independent comparison. Possible explanations for the deviations are discussed.

Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Radar Remote Sensing of Ocean Waves - Global Mapping of Mean and Peak Wave Parameters Extracted from SAR Cross Spectra
Authors:
AuthorsInstitution or Email of Authors
Hoja, DanielleUNSPECIFIED
Date:2004
Number of Pages:271
Status:Published
Keywords:Remote sensing, SAR, ERS, ENVISAT, Wave mode, Imagette, Oceanography, Ocean waves, Sea state, Wind sea, Swell, Wave model, WAM, SAR imaging model, Complex cross spectrum, Ocean wave spectrum, , (Significant) Wave height, Wavelength, Propagation direction, Image variance, Range splitting effect, Severe weather, Hurricane, Swell tracking
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Cornelia Roehl
Deposited On:07 Feb 2006
Last Modified:14 Jan 2010 19:50

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