Precipitation Cluster Processing chain
description
Transcript of Precipitation Cluster Processing chain
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Precipitation ClusterProcessing chain
H-SAF Training and Users Service, Rome, 14-15 December 2009
Cap. Davide MELFICap. Davide MELFI
ITALIAN AIR FORCE MET SERVICEC.N.M.C.A. - Satellite Branch
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TOPICS
• HW architecture
• Overview on processing chains
• Changing in PR-OBS03 processing chain
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Previous HW architecture for HSAF’s products
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New HW architecture for HSAF’s products
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BUFR output:Encoded by ECMWF libemoswith B0000801102
ASCII output:sea/land/coast indicationPNG output: Made with GMT freeware SW
PNG output: Made with GMT freeware SW
PNG output: Made with GMT freeware SWPNG output: Made with GMT freeware SW
BUFR output:Encoded by ECMWF libemoswith B0000801102
ASCII output:sea/land/coast indicationGRIB2 output: Encoded by ECMWF grib_api
GRIB2 output: Encoded by ECMWF grib_api
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ftp://ftp.meteoam.it/utilities/Bufr_decode/
Header
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Products ONLINE OFFLINE OUTPUT formatftp://ftp.meteoam.it/utilities/
PR-OBS01 3 min (input – 2,5 h delay)
BUFRPR-OBS02 30 sec (input – 5 min
delay)1 month /1 week +
Recovery from archive
PR-OBS03 1 min
1 month /1 week + Recovery from archive GRIB2
PR-OBS05 3 min
Processing Time
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Changing in PR-OBS03 processing chain
• H03: version 1.0 First release
• H03: version 1.1
• H03: version 1.2 Exclusion of Semi-transparent cloud
• H03: version 1.3 Parallax error correction
Input in BUFR format
Decreasing of computational time:- Optimization of the SW- Masking of IR data (cloudy pixels)
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MaskingNWCSAF - Cloud type
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EFFECT OF OBSERVATION ZENITH ANGLE AND CLOUD TOP HEIGHT ON PARALLAX DISPLACEMENT
SUB SATELLITE POINT SSP PARALLEX
DISPLACEMENT
Parallax error
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NWCSAF - CTH
Parallax error correction
EUMETSAT subroutine(Marianne König )
Case study 4-10-2008 16:42
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2 pixels in the same new one The colder one remains
Parallax error correction
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03:00 03:15 03:30 03:45 04:00 04:15 04:30 04:45 05:00 05:15 05:30 05:45
TimelineHSAF 03:15 RUNNING
03:30 05:45
SEVIRIMSU
SEVIRIMSUSSMI
Receiving time
Acquisition time
Delayed running
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Last 3 H. 3 H before
Last 3 H.
12-9 before
9-6 before
6-3 before
Last 3 H.
Last 3 H.
6-3 before
9-6 before
12-9 before
24-12 before
Contribute of SSMI/S data to OBS5Cum. Prec
3.00 6.00 12.00 24.00
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Thanks for attention!