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.