Precipitation Cluster Processing chain ITALIAN AIR FORCE MET SERVICE C.N.M.C.A. - Satellite Branch Precipitation Cluster Processing chain Cap. Davide MELFI H-SAF Training and Users Service, Rome, 14-15 December 2009

TOPICS HW architecture Overview on processing chains Changing in PR-OBS03 processing chain

Previous HW architecture for HSAF’s products Now we have all hw to complete the implementation of all lines of production of HSAF. So during the next months the wp 2100 will be dedicated to finalize the operative chain, because an important review from EUMETSAT will be done in October. People of wp 2100 must work to following document: Algorithm Theoretical Definition Document (ATDD) Component Design Document (CDD) Component Verification File (CVERF) Product Prototyping Report (PPR) System Software system Document (SSVD) System Validation File (SVALF) Data Output Format (DOF) In particular the Component Verification File , Product Prototyping Report , System Software system Document , System Validation File , Data Output Format describe the functionality of OC at Host Institute. So this documents will be the guide for the inspections at Host Institute by EUMETSAT.

New HW architecture for HSAF’s products

BUFR output: Encoded by ECMWF libemos with B0000801102 ASCII output: sea/land/coast indication PNG output: Made with GMT freeware SW BUFR output: Encoded by ECMWF libemos with B0000801102 ASCII output: sea/land/coast indication PNG output: Made with GMT freeware SW GRIB2 output: Encoded by ECMWF grib_api PNG output: Made with GMT freeware SW GRIB2 output: Encoded by ECMWF grib_api PNG output: Made with GMT freeware SW

Header ftp://ftp.meteoam.it/utilities/Bufr_decode/

ftp://ftp.meteoam.it/utilities/ Processing Time Products ONLINE OFFLINE OUTPUT format ftp://ftp.meteoam.it/utilities/ PR-OBS01 3 min (input – 2,5 h delay) BUFR PR-OBS02 30 sec (input – 5 min delay) 1 month /1 week + Recovery from archive PR-OBS03 1 min GRIB2 PR-OBS05 3 min

Changing in PR-OBS03 processing chain H03: version 1.0 First release H03: version 1.1 Input in BUFR format Decreasing of computational time: Optimization of the SW Masking of IR data (cloudy pixels) H03: version 1.2 Exclusion of Semi-transparent cloud OBS 1: The schedule provided the issue of i.2 version before the march. The delay does not allow the reprocessing within the current year OBS 2:Inclusion of METOP, NOAA 19 and correction of channel 4. At the moment is not clear the impact of the upgrade about the new channel. OBS 3: The parallax correction is ready. The discrimination of thin clouds is ready. If PT approves the correction will be insert. I propose to collect a data set to cal/val OBS 4: The algorithm should be ready for integration June. Attempt to insert OBS 4 in o.c. before the end of summer. PR-ASS1: No enlargement of area at the moment. Will be considered in the CDOP H03: version 1.3 Parallax error correction

Masking NWCSAF - Cloud type OBS 1: The schedule provided the issue of i.2 version before the march. The delay does not allow the reprocessing within the current year OBS 2:Inclusion of METOP, NOAA 19 and correction of channel 4. At the moment is not clear the impact of the upgrade about the new channel. OBS 3: The parallax correction is ready. The discrimination of thin clouds is ready. If PT approves the correction will be insert. I propose to collect a data set to cal/val OBS 4: The algorithm should be ready for integration June. Attempt to insert OBS 4 in o.c. before the end of summer. PR-ASS1: No enlargement of area at the moment. Will be considered in the CDOP

Parallax error EFFECT OF OBSERVATION ZENITH ANGLE AND CLOUD TOP HEIGHT ON PARALLAX DISPLACEMENT SUB SATELLITE POINT SSP PARALLEX DISPLACEMENT

Parallax error correction EUMETSAT subroutine (Marianne König ) NWCSAF - CTH Scheme of parallax correction OBS 1.3 The input of algorithm is not the simple 10.8, it is the 10.8 filtered by: A cloud mask; A movement of pixel by parallax correction; The cloud mask is arranged by the CLOUD TYPE product of NWC-SAF The parallax correction is calculated from the CTH of NWC-SAF Case study 4-10-2008 16:42

Parallax error correction May happen that two different pixels, with different height, are projected into a same pixel. We agree that higher The figure shows us the moving of PIXEL in the new reprojection. 2 pixels in the same new one The colder one remains

Delayed running HSAF 03:15 RUNNING 03:30 05:45 SEVIRI MSU SEVIRI MSU 03:00 03:15 03:30 03:45 04:00 04:15 04:30 04:45 05:00 05:15 05:30 05:45 Timeline HSAF 03:15 RUNNING 03:30 05:45 SEVIRI MSU SEVIRI MSU SSMI Acquisition time Receiving time

Contribute of SSMI/S data to OBS5 Cum. Prec 3.00 6.00 12.00 24.00 Last 3 H. 3 H before 12-9 before 24-12 before Last 3 H. 9-6 before 6-3 before Last 3 H. 12-9 before 9-6 before Ho we fill in the OBS 5 You can see the cumulate at 3, 6, 12 and 24 hours. The blu box represents the last 3 hours time. So The blu box are worked with AMSU data instead the red box are worked with SSM data 6-3 before Last 3 H.

Thanks for attention!

CNMCA set up a reanalysis environment (OBS1,2,3), with a suite ready for June for comparison of same case studies with different ingredients to compare their impacts (parallax correction, etc.) TESEO PERSEO MEDUSA

Acquisition time Receiving time Timeline 03:00 03:15 03:30 03:45 04:00 04:15 04:30 04:45 05:00 05:15 05:30 05:45 Timeline Receiving time Acquisition time OBS 1 l’algoritmo è completo ed è previsto aggiornamento data base al termine del VS. Non alimenta OBS3, ritardo DMSP. Ipotesi di inserimento: Produzione parallela e differita di 3 ore; OBS 2 v1 sarà operativo fino alla installazione on-line della c.o. del OBS 2 v2. Attualmente alimenta OBS 3 e successivamente OBS 5 OBS 2 v2 off line fino alla fine dell’anno OBS 3 è prevista ulteriore modifica: istogramma, ottimizzazione del sw impatto su cpu time OBS 5 al massimo inizio maggio