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RMIB GERB Processing status

RMIB GERB Processing status. S. Dewitte Royal Meteorological Institute of Belgium. Overview. Processing status. Product quality status. Data release plan. Processing status. Reprocessing June, July, Dec 2004 for testing new spectral response: V999, available for GIST members.

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RMIB GERB Processing status

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  1. RMIB GERB Processing status S. Dewitte Royal Meteorological Institute of Belgium GIST, London, 14-16/12/2005

  2. Overview • Processing status. • Product quality status. • Data release plan. GIST, London, 14-16/12/2005

  3. Processing status • Reprocessing June, July, Dec 2004 for testing new spectral response: V999, available for GIST members. • Operational processing restarted after eclipse safety period: V2, close to V999 (geolocation degraded). GIST, London, 14-16/12/2005

  4. Major changes compared to pre eclipse V2 • New spectral response, calibration, unfiltering. • Activation improved LOS non repeatability correction (not in NRT V2). • Activation full thermal ADM correction (addition hot desert) • Dedicated clear sky ocean unfiltering and desactivation aerosol correction. GIST, London, 14-16/12/2005

  5. Geolocation • V999 quality visually satisfactory for resolution enhancement to 3x3 SEVIRI resolution. • Same quality is achievable in NRT (see presentation Luis Gonzalez). • OK for release GIST, London, 14-16/12/2005

  6. Spectral response & SW calibration • SW scene dependent differences with CERES have gone away in V999. • GERB SW now about 6% higher then CERES. • Can be released with realistic error estimate. GIST, London, 14-16/12/2005

  7. Unfiltering • No show stoppers (see presentation Nicolas Clerbaux). • OK for release GIST, London, 14-16/12/2005

  8. Clouds • Degraded quality in sun glint and sunset region, inherent to use visible channels (see presentation Alessandro Ipe). • OK for release • Possible future improvement using infrared channels. GIST, London, 14-16/12/2005

  9. SW ocean asymmetry • Main identified cause: SEVIRI SW BB error propagates to small non linearity in GERB processing (see presentation Cedric Bertrand) • Solution possible for release GIST, London, 14-16/12/2005

  10. Aerosol • Include in GERB products: • Cloud/cirrus/dust information • Aerosol optical depth over ocean GIST, London, 14-16/12/2005

  11. HDF 5 update • Currently used version 1.44 has bug. • Update to version 1.6 • Users need to make update as well to be able to read new HDF files (old files will still be readable) GIST, London, 14-16/12/2005

  12. Data release plan • Approval of data release options at this meeting. • Need 2 months to buy new computers for NRT geolocation. • If new NRT geolocation operational: freezing of algorithm, use • for NRT + 40 day validation. • for reprocessing backwards in time. • Start GERB 2 commissioning. • Document algorithm and validation in series of reviewed papers. GIST, London, 14-16/12/2005

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