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TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
TU1.L10 - Globwave and applications of global satellite wave observations
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TU1.L10 - Globwave and applications of global satellite wave observations

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  • 27. Juli 2010 | Title of Presentation
  • 27. Juli 2010 | Title of Presentation
  • • Added value compared to original L2 product.• Wave spectra partitioning (Methodology from Portilla et al. 2009)• Quality estimation (in this first version one quality estimate per spectra, not per partition : that will come in the second version since it requires original L2 reprocessing )• Error characterisation and calibrated values of integrated wave parameters.• Ancillary information such as water depth, distance to coast, meteorological conditions, presence of ice ... • NetCDF format, easy to browse and read 27. Juli 2010 | Title of Presentation
  • Transcript

    • 1. Fabrice Collard, CLS Geoff Busswell, Logica GlobWave project applications of global satellite wave observations
    • 2. Partners
      • ESA: Funding the project through its Data User Element Programme
      • CNES: Providing co-funding and advice during the project
      • Logica: Prime Contractor – responsible for all development, delivery and public outreach of GlobWave for ESA.
      • Ifremer: Responsible for development of the portal, in situ database and hosting of the data and operational system
      • SatOC: Responsible for the Altimeter processing, error characterisation methodologies and documentation
      • CLS: Responsible for the SAR processing and error characterisation
      • NOC: Responsible for the Pilot Spatial WFVS and HR-DDS
      No. 27 July 2010 Project GlobWave
    • 3. Objective
      • Improve the uptake of satellite-derived wind-wave and swell data in the
      • Scientific
      • Operational
      • Commercial
      • User Communities
      No. 27 July 2010 Project GlobWave
      • User Group : helped ESA define scope of project
        • Initial set of 35 people/organisations – current status is 45
    • 4. Strategy
      • Develop a GlobWave web portal
        • Single point of reference for satellite wave data
        • Clear documentation about satellite data acquisition techniques
        • Access to on-line tools, reports, cal/val info, etc.
      • Provision of:
        • A multi-sensor set of satellite wave data in a common format and meta-data standard.
        • A set of demonstration data products
      • Inter-comparison of different wave data sources
        • SAR and altimeter wave data error characterisation using collocated in situ measurements
        • Cross characterisation between different satellite data streams
      No. 27 July 2010 Project GlobWave
    • 5. Exemple of Error characterisation results
    • 6. Satellite Products
      • All satellite products available in a “common” L2P format
        • NetCDF-3
        • Meta-data standard is CF-1.4 compliant
      • Data are available for the full archive of each satellite (released on 22nd April 2010)
      • NRT data will be available within 1 hour of receipt (available in late summer)
      • Future Satellite Data
        • Cryosat-2 – successful launch in March, 2010
        • Altika – due for launch at the end of 2010
      No. 27 July 2010 Project GlobWave ERS-1, ERS-2, ENVISAT ERS-1, ERS-2, ENVISAT, TOPEX/POSEIDON, Jason-1, Jason-2, GEOSAT, GFO Altimeter SAR
    • 7. SAR L2P Products
      • Added value compared to original L2 product
        • SAR Wave spectra partitioning (Methodology from Portilla et al. 2009)
        • Quality estimation (in this first version one quality estimate per spectra, not per partition : that will come in the second version since it requires original L2 reprocessing )
        • Error characterization and calibrated values of integrated wave parameters
        • Ancillary information such as water depth, distance to coast, meteorological conditions, presence of ice …
      • NetCDF format, easy to browse and read
      No. 27/07/10 Project GlobWave
    • 8. Satellite vs In Situ Matchup Database
      • A satellite vs. in situ matchup database has been constructed using:
        • The full archive of L2P satellite data
        • An initial set of in situ data sources from:
          • POSEIDON
          • Puertos del Estado
          • NODC
          • UKMO
          • CDIP
          • MEDS (Aug 2010)
      • Derived error statistics are beeing inserted into satellite data (to be completed by mid August 2010)
      No. 27 July 2010 Project GlobWave
    • 9. Satellite vs Satellite Matchup Database
      • Database of satellite crossovers will be produced
      • Collocation criteria will be used of:
        • 60 km
        • 1hour
      • Full archives of data will be used
      • Each year the new crossovers will be produced
      • Differences analysed wrt wind speed and H
      No. 27 July 2010 Project GlobWave GFOSAT ERS-1 ERS-2 TOPEX/ Poseidon Jason-1 Jason-2 Envisat GFOSAT ERS-1 ERS-2 TOPEX/Poseidon Jason-1 Jason-2 Envisat Same orbit track Different time frames Matchups possible
    • 10. GlobWave Diagnostic Data Set (DDS)
      • Allows the following interactive inter-comparisons over fixed sites of interest:
        • Satellite vs. satellite
        • Satellite vs. model
        • Model vs. model
      • Calculations are of a diagnostic nature (i.e. not based on a matchup database)
      • For each parameter, various statistics can be generated (mean, min, max, standard deviation, skew, kurtois, median)
      • Interactive plot generation, 2-D and 1-D plots
      • Allows the request of periodic (offline) and interactive reports
      No. 27 July 2010 Project GlobWave
    • 11. Online Tools
      • Data Dissemination
        • FTP (browsable directories by satellite/year/day, etc.)
        • THREDDS/OpenDAP
      • External links to 3rd party tools for:
        • Data search
        • Data sub-setting
        • Visualisation
      • Satellite vs. in situ query interface
        • Query criterion (Space/time window, etc)
        • Extraction in NetCDF format
        • Statistical and graphical displays
      • HR-DDS services
        • Satellite and model diagnostic inter-comparisons
        • Statistics and visualisation
      No. 27 July 2010 Project GlobWave
    • 12. Pilot Spatial Wave Forecast Verification Scheme
      • Existing WFVS scheme:
        • Initiated by ECMWF and operated since 1995
        • Monthly inter-comparison of in situ and model data
        • 12 participating Meteorological organisations
      • GlobWave Pilot Spatial WFVS will extend the existing scheme:
        • Operate for a demonstration period of 2 years
        • Allow inter-comparison of satellite and model data
        • Ingest model data on a monthly basis from participating organisations
        • Provide (configurable) offline reports on a monthly basis illustrating the previous months inter-comparisons
        • Allow interactive inter-comparisons using the GlobWave DDS
      No. 27 July 2010 Project GlobWave
    • 13. Demonstration Products
      • GlobWave will host “demo products” which could be:
        • New types of info derived from SAR/Altimetry
        • Merged SAR/Altimeter products
        • Satellite wave retrievals augmented with model data
        • Analysis from assimilations of satellite wave data into wave models
      • The initial set of demonstration products is:
        • Hs-Tz scatterplots (SatOC)
        • Fireworks (CLS)
        • Soprano (CLS)
      • Win-win!
        • Demo products concept designed to stimulate wave community to get involved
        • Great publicity/outreach for your organisation
      No. 27 July 2010 Project GlobWave
    • 14. Demonstration product : Swell Source Identification
      • Principle: Identify regions and time of refocusing of observed swell partitions propagated back in time following linear theory of wave propagation
        • For each detected source, separated identification in space and time for groups of long, mid and short swell.
    • 15.
        • Over 300 detected sources, good spreading of time of refocusing depending on wavelength:
        • Any reference to the generating storm?
      Demonstration product : Swell Source Identification Wavelength Time of refocusing [hours] (long wavelengths are taken as reference time) Mid 5h Short 14h
    • 16.
        • Comparison with Storm tracks: storms are tracked using JRA-25 model with local maximum vorticity as criteria:
          • Identifies storm center: Good for tracing the storm life cycle, but can be far from region of highest winds.
          • Vorticity value used as indicator on storm strength (since max wind difficult to attach to a certain storm)
      Storm track from JRA-25 Track of max refocusing for all wl groups Long WL – 8 Janv 0H Mid WL – 8 Janv 6H Short WL – 9 Janv 6H Demonstration product : Swell Source Identification
    • 17.
      • Comparison of time of max. vorticity (≈max. strength) with time of swell generation given by refocusing:
      •  Swell is generated after occurrence of the max. (strong winds)
      •  Swell generation time mostly depends on the remaining fetch
      Demonstration product : Swell Source Identification Wavelength Time of refocusing [hours] (reference time is time of max vorticity) Long 11,5h Mid 16,5h Short 24h
    • 18.  
    • 19. GlobWave Portal
      • Products area
        • Product User Guide
        • Wave data handbook
        • Demo Product Access
      • Validation area
        • L2P Quality Control Reports
        • Global Wave Statistics info
      • Tools area
      • Workshops & events area
      • Community News
      No. 27 July 2010 Project GlobWave www.globwave.info
    • 20. Outreach
      • User Group of 45 people/organisations
        • Spans scientific, operational and commercial user communities
        • We consulted closely with participants to define user requirements
      • Bi-annual Newsletter
        • First issue distributed at the end of 2009.
        • Second issue distributed during Autumn 2010
      • Conference posters/presentations
        • WISE 2009, OceanSAR 2009, OceanObs, SeaSAR 2010, ESA Living Planet 2010, IGARSS 2010
      • Hosting of demo products –help stimulate wave community
      • User Consultation Meetings
        • 3 planned (at end of each phase), allows us to gather feedback
        • 1st UCM was held at Ifremer on 29th, 30th April 2010
      No. 27 July 2010 Project GlobWave
    • 21. Timeline
      • Started in Jan 2009
        • Started with Requirements Baseline and Technical Specification (published 2009)
        • All delayed mode GlobWave data available via ftp
        • Final version of portal
        • Producing Pilot Spatial WFVS Reports
        • Initial demo products
        • Satellite-satellite inter-comparisons for archived products (July 2010)
        • MDB for archived satellite and in situ data (July 2010)
        • NRT data will be available via ftp (August 2010)
      • Due early 2011
        • Wave Data Handbook
        • Updates of Inter-comparisons
        • Online tools for query of MDB.
      • End of Project - early 2012 -> transfer from ESA to EU GMES services ?
      No. 27 July 2010 Project GlobWave
    • 22. Questions No. 27 July 2010 Project GlobWave

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