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A parametric scheme for the retrieval of 2-D ocean wave spectra from synthetic aperture radar look cross spectra

Schulz-Stellenfleth, Johannes and Nieto-Borge, Jose Carlos (2005) A parametric scheme for the retrieval of 2-D ocean wave spectra from synthetic aperture radar look cross spectra. In: Book of Abstracts and Proceedings, CD-ROM (paper 22), pp. 1-7. WAVE 2005, 2005-07-03 - 2005-07-07, Madrid (Spain).

Full text not available from this repository.

Abstract

A parametric algorithm is presented to estimate two-dimensional ocean wave spectra from ENVISAT ASAR wave mode data on a global scale. The retrieval scheme makes use of prior information taken from numerical wave models. The Partition Rescale and Shift algorithm (PARSA) is based on a partitioning technique, which splits an a priori wave spectrum into its wave system components. Integral parameters of these systems, such as mean direction, mean wavelength, waveheight, and directional spreading are then adjusted iteratively to improve the consistency with the SAR observation. The method takes into account the full nonlinear SAR imaging process and uses a maximum a posteriori approach, which is based on statistical model quantifying the errors of the SAR imaging model, the SAR measurement, and the prior wave spectra. The method is applied to a global data set of ENVISAT ASAR data acquired during the CAL/VAL phase. The benefit of cross spectra compared to conventional symmetric image spectra is demonstrated.

Document Type:Conference or Workshop Item (Speech)
Title:A parametric scheme for the retrieval of 2-D ocean wave spectra from synthetic aperture radar look cross spectra
Authors:
AuthorsInstitution or Email of Authors
Schulz-Stellenfleth, JohannesUNSPECIFIED
Nieto-Borge, Jose CarlosUNSPECIFIED
Date:2005
Journal or Publication Title:Book of Abstracts and Proceedings
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:CD-ROM
Page Range:pp. 1-7
Status:Published
Keywords:ENVISAT ASAR
Event Title:WAVE 2005
Event Location:Madrid (Spain)
Event Type:international Conference
Event Dates:2005-07-03 - 2005-07-07
Organizer:CEDEX
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):W - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Remote Sensing Technology Institute > Marine Remote Sensing
Deposited By: Bärbel Bolowski
Deposited On:10 Feb 2006
Last Modified:14 Jan 2010 20:17

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