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First Results Obtained in the OSIRIS Project

Schulz-Stellenfleth, Johannes and König, Thomas and Lehner, Susanne and Li, Xiao-Ming (2008) First Results Obtained in the OSIRIS Project. In: SeaSAR2008 (SP-656 (on CD-ROM)), pp. 1-24. ESA. SeaSAR2008 (the 2nd international workshop on advances in SAR oceanography from Envisat and ERS missions), 2008-01-21 - 2008-01-25, ESA - ESRIN, Frascati, Italy.

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In the OSIRIS project funded by ESA a potential extension of the current level 2 ENVISAT ASAR wave mode product is investigated. The idea of the project which is still in its first phase is to complement the current product with a complete two dimensional ocean wave spectrum which results from a blending of the ASAR measurement with information from a numerical model. The estimate of the spectrum is based on a maximum a posteriori approach and is computed with the PARSA (Partition rescale and shift algorithm) developed by DLR. In the presentation first results obtained using a test data set of wave spectra from the WAM model and buoy data from the IFREMER co-location system are presented. The basic methodology of the inversion scheme is presented and different retrieval examples are presented. Triple co-locations of prototype products of the extended level-2 products with co-located buoy and WAM data are analyzed. Furthermore the project structure is explained and the coming activities are summarised. A statistical validation and assessment will be performed in terms of spectral parameters most often used in practise, e.g., zero upcrossing period, peak period, significant wave height, swell wave height, wind sea wave height and propagation directions. Furthermore more sophisticated parameters like the crest length, the wave power and the expected maximum wave height will be investigated. The first analysis will concentrate on the North Atlantic with particular focus on storm events. Other regions will be considered as well to get a representative picture of the algorithm performance, e.g., in swell dominated regions. An additional analysis will be performed using the empirical CWAVE algorithm which provides estimates of integral wave parameters like the significant wave height without a priori information.

Item URL in elib:https://elib.dlr.de/55502/
Document Type:Conference or Workshop Item (Speech)
Title:First Results Obtained in the OSIRIS Project
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:April 2008
Journal or Publication Title:SeaSAR2008
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-24
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:OSIRIS, PARSA, two-dimensional ocean wave spectrum
Event Title:SeaSAR2008 (the 2nd international workshop on advances in SAR oceanography from Envisat and ERS missions)
Event Location:ESA - ESRIN, Frascati, Italy
Event Type:international Conference
Event Start Date:21 January 2008
Event End Date:25 January 2008
Organizer:ESA - ESRIN
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 , Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Marine Remote Sensing
Deposited On:17 Oct 2008
Last Modified:24 Apr 2024 19:19

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