CM-SAF Board Meeting, Offenbach, April 2006 CM-SAF TOA radiation status report D. Caprion Royal Meteorological Institute of Belgium.

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Presentation transcript:

CM-SAF Board Meeting, Offenbach, April 2006 CM-SAF TOA radiation status report D. Caprion Royal Meteorological Institute of Belgium

CM-SAF Board Meeting, Offenbach, April 2006 Overview  Status input products: GERB –Release: cf Steven –Impact on TOA SAF products ?  A few words about CERES.

CM-SAF Board Meeting, Offenbach, April 2006 GERB status  Instrument currently in safe mode at night (eclipse seasons)  Biggest news: Release of GERB (we are now officially allowed to use GERB data for scientific purpose)

CM-SAF Board Meeting, Offenbach, April 2006 GERB release Changes in GERB data... Before After

CM-SAF Board Meeting, Offenbach, April 2006 GERB release Impact on treatment: e.g. sunglint effect ! DC 15h00 UTC : average over last week of March 2006

CM-SAF Board Meeting, Offenbach, April 2006 GERB release Impact on treatment: –Missing data strategy has to be changed: i.e. replacement of GERB-like by GERB Until now: image per image. From now on: pixel per pixel ! Get intro trouble: inter-calibration !

CM-SAF Board Meeting, Offenbach, April 2006 GERB/GERB_like inter-calibration First idea: –GERB and GERB-like fluxes are proportional F gerb_like = k * F gerb –Strong assumption : k is constant over a month then it can be determined from monthly mean flux

CM-SAF Board Meeting, Offenbach, April 2006 GERB/GERB_like inter-calibration But !!! Eclipse shutdown

CM-SAF Board Meeting, Offenbach, April 2006 GERB/GERB_like inter-calibration

CM-SAF Board Meeting, Offenbach, April 2006 GERB/GERB_like inter-calibration Second idea: (only for shortwave) –First correct the diurnal cycle effect (i.e. flatten the curve) –Rescale F Gerb_like to F Gerb F Gerb_like =k*(  (  s,  v,...)*F Gerb ) Correction to take into account: solar angle  s viewing angle  v and more if needed… as surface type for instance

CM-SAF Board Meeting, Offenbach, April 2006 CERES status  Used: –ES9, Terra, FM1, Edition 1: up to October 2005 –ES9, Terra, FM2, Edition 1_CV: since November 2005 FM2 is working as FM1: cross-track mode  More advanced: SRBAVG –Released but not yet available after 2003 –Big delay: minimum 6 months...!!!

CM-SAF Board Meeting, Offenbach, April 2006 To be done  Implementation of inter-calibration –GERB/GERB-like and also SAF/CERES  Still: to run operational chains  Reprocessing of data from now back to August 2003.