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Working Group On Calibration and Validation
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Decorative image showing Pacific Ocean temperatures as a shaded color-contour map Decorative image showing the Western Hemisphere land and sea surface temperatures as a shaded color-contour map
ACSG
Chair

 Dr. Bojan R. Bojkov
  NASA / GSFC
  Code 613.3
  Greenbelt
  MD 20771
  USA
  tel:
    +1 301 614 6846
  fax:
    +1 301 614 5903
  email:
    Bojan.R.Bojkov
    @nasa.gov


ACSG photo
  Assimilated GOME total ozone 25-Jul-02 Courtesy: KNMI/ESA
 Mission
To ensure accurate and traceable calibration of remotely-sensed atmospheric chemistry radiance data and validation of higher level products, for application to atmospheric chemistry and climate research

 Terms of Reference
The Atmospheric Composition subgroup was approved at CEOS Plenary 15 in November 2001. The objectives of the Atmospheric Composition subgroup, beyond those of the WGCV, are to:
  • Promote international collaboration and technical exchange to ensure the efficient use and maintenance of calibration/validation resources required for atmospheric chemistry missions
  • Verify accurate scientific products by encouraging an end-to-end approach to the calibration and validation of Level 1 and Level 2 data products, and any subsequent re-calibration and reprocessing
  • Ensure that validation sensors are calibrated to traceable national standards, with documented statements of accuracy and repeatability
  • Encourage interaction between calibration scientists and data users to enable a better understanding of data uncertainties and user requirements
  • Recommend a network of validation sites and to encourage continuous observation and quality control of data through the use of standard procedures and inter-comparison
  • Develop comprehensive data validation methods that employ ground, aircraft, balloon, and satellite measurements and data assimilation with chemical transport models
  • Specify a comprehensive, consistent and quality-controlled multi-mission validation database in an accepted format and employing user-friendly tools
  Action Plan
The membership of the subgroup will be completed by including relevant agencies and organisations who are not yet represented. The subgroup will initiate and support the process of approaching agencies, through CEOS, for partial sustained support for ground validation networks and the maintenance of these networks between missions. Data validation archival and retrieval for the long term and across present and future mission applications is seen as very important and this will be actively pursued. The subgroup will meet regularly to review and coordinate upcoming validation activities, discuss results and pursue its main objectives. These objectives will be reviewed and updated as required.

 Members
Len Barrie WMO
Bojan R. Bojkov NASA/GSFC/Univ of Maryland, ACSG Chair
John Burrows Univ of Bremen
Lawrence Flynn NOAA
Lucien Froidevaux NASA/JPL
Neil Harris EC
Jean-Christopher Lambert BELSPO/IASB-BIRA, ACSG Vice Chair
William Lahoz NILU (for BNSC)
 Rose Munro Eumetsat
Ankie Pieters KNMI
Kimberly Strong Univ of Toronto
Makoto Suzuki JAXA
Kaley Walker Univ of Toronto
Claus Zehner ESA/ESRIN
Robert M. Koopman ESA/ESRIN
Aasmund Fahre NILU