IPWG, 4th Workshop, Beijing, 13-17 October 2008 1
UPDATE ON THE STATUS OF PRECIPITATION PRODUCTSIN THE EUMETSAT SATELLITE APPLICATION FACILITY
ON HYDROLOGY AND WATER MANAGEMENT(H-SAF)
Bizzarro Bizzarri, on behalf of the H-SAF consortium
Contents• Background, objectives, partnership
• Introduction to the precipitation products, including:- algorithm architecture- examples of products routinely available
• Indication of access mode.
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SATELLITE APPLICATION FACILITIES (SAF’s):decentralised elements of the EUMETSAT Application Ground Segment
Meteosat MetOp-EPS Other satellites (NOAA, TRMM, AQUA, ...)
EUMETSAT Central Facility
NowcastingSAF
Ocean & IceSAF
ClimateSAF
NWPSAF
OzoneSAF
LandSAF
GRAS MeteoSAF
HydrologySAF
U S E R S
New !
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Objectives of H-SAF
The objectives of H-SAF are:
• to provide new satellite-derived products:- precipitation (liquid, solid, rate, cumulate)
- soil moisture (at surface, in the roots region)
- snow parameters (cover, melting conditions, water equivalent);
• to perform independent validation of the usefulness of the new products for hydrological applications.
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Composition of the H-SAF Consortium
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NOAA-18AMSU-A + MHS
13:40 a
NOAA-17AMSU-A + AMSU-B
10:20 d
MetOp-1AMSU-A + MHS
9:30 d
DMSP F-13SSM/I6:30 d
DMSP F-16SSMIS8:10 d
DMSP F-17SSMIS5:30 d
One-orbit coverage from six operational meteorological satellites equipped with MW instruments in years 2008-2009. The figure assumes all satellites cross the ascending or descending equatorial node at 12 UTC. In red, conical scanning imagers (swath 1400 km); in blue cross-track scanning sounders (swath 2200
km).
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SSM/I – SSMIS processing chain AMSU – MHS processing chain LEO/MW + GEO/IRprocessing chain
SSM/I
DMSP F15
Processor
SSMIS
DMSP F16
Processor
AMSU-A
NOAA,MetOp
Processor
AMSU-B
NOAA 17
Processor
MHS
NOAA 18,MetOp
Processor
SEVIRI
Meteosat 8
Processor
PR-OBS-1 – Precipitation ratefrom conical scanners
PR-OBS-3&4– Precipitation ratefrom blended LEO/MW and GEO/IR
Accumulated precipitationprocessing chain
PR-OBS-5 – Accumulated precipitationfrom blended LEO/MW and GEO/IR
End-users and H-SAF central archive
Quality control Quality control Quality control
PR-OBS-2 – Precipitation rate from cross-track scanners
Quality control
Observed precipitation products generation chain.
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Flow chart of the SSM/I-SSMIS precipitation rate processing chain
Meteorologicalevents
Simulatedcloud microphysics
SimulatedMW radiances
Cloud-RadiationDatabase
Cloud ResolvingModel
Radiative TransferModel
Instrumentmodel
Actual SSM/I - SSMIS data (pre-processed)
Ingestionpreparation model
Precipitationretrieval model
Uncertaintyestimator model
Error structuredatabase
PRECIPITATION RATEERRORESTIMATE
OFF-LINE ACTIVITY REAL-TIME ACTIVITY
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Example of precipitation map from SSM/I - Left: retrieved precipitation; right: brightness temperature in channel 85.5 GHz, V polarisation - Satellite DMSP-F14,
day 26 July 2008, pass 15.11-15.17 UTC (northbound).
PR-OBS-1 is routinely available at ftp://ftp.meteoam.it
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AMSU-A (48 km)
AMSU-B or MHS (16 km)
AMSU-A (16 km)
Extraction of high-spatial frequency content
Geometrical manipulations(reduction to
vertical viewing)
Cloud microphysics provision (cloud
radiation database from MM5 simulations)
Retrieval algorithm(neural network)
PRECIPITATION RATE
Flow chart of the AMSU-MHS precipitation rate processing chain
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Example of precipitation map from AMSU - Left: retrieved precipitation; right: brightness temperature in channel 89 GHz of AMSU-B, V polarisation - Satellite NOAA-
15, day 14 Sep 2008, pass 15:00-15:10 UTC (northbound).
PR-OBS-2 is routinely available at ftp://ftp.meteoam.it
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SSM/I-SSMIS
AMSU-MHS
SEVIRI15-min images
~ 3-hourly sequenceof MW observations
Lookup tablesupdating Rapid-update
algorithm
Extraction of dynamical info
Morphingalgorithm
(not ready)
PRECIPITATIONRATE
Flow chart of the LEO/MW-GEO/IR-blending precipitation rate processing chain
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Example of map of precipitation rate from SEVIRI + PR-OBS-2. Meteosat-9, day 03 Feb 2008, time 08:15 UTC.
PR-OBS-3 is routinely available at ftp://ftp.meteoam.it
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IR radiances from GEOcalibrated by MW-derived precipitation rate (Rapid Update) (PR-OBS -3)
Library of error structure of PR-OBS -3
PR-OBS -3products archive
MW-derived precipitation rate continuised by IR imagery from GEO(Morphing) (PR-OBS -4)
Library of error structure of PR-OBS -4
PR-OBS -4products archive
On-line meteorological information(surface wind, temperature,
rain gauge, NWP output)
Accumulated precipitation
in the last 24 h
Accumulated precipitation
in the last 12 h
Accumulated precipitationin the last 6 h
Accumulated precipitationin the last 3 h
Flow chart of the accumulated precipitation processing chain.
PR-OBS-5products
generation
Quality control
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6-hourly SEVIRI images (10.8 μm channel) at 00, 06, 12, 18 and 24 UTC and the corresponding 24-h accumulated precipitation (PR-OBS-5). 1st February 2008.
Maps for the accumulated precipitation in the previous 3, 6, 12 and 24 hare generated each 3 hours
PR-OBS-5 is routinely available at ftp://ftp.meteoam.it.
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Instantaneous precipitation on 8 February 2008 at 00 UTC and accumulated precipitation in the previous 24 h, computed by the COSMO-ME NWP model.
Each 3 hours the model generates the map of instantaneous precipitation (at 00, 03, 06, 09, 12, 15, 18, 21 UTC) and the maps of accumulated precipitation in the previous 3, 6, 12 and 24 hours.
PR-ASS-1 is routinely available at
ftp://ftp.meteoam.it.
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CONCLUSIONS
The H-SAF Development Phase (2005-2010) is now running since 3 years.
Of the envisaged 6 precipitation products, 5 are being generated routinely.
The missing one (PR-OBS-4, the MW/IR blending by “morphing”) is expected to be ready in mid-2009. However, according to the developer (Vincenzo Levizzani), the capability to meet operational requirements (specifically timeliness) is not sure.
Data are used by the Product validation teams and for impact studies in the Hydrological validation programme.
All products can be accessed from the Italian Meteorological Service ftp site. Access is restricted to beta users (username and password needed), but IPWG members are entitled to get access.
The H-SAF web site is open: http://www.meteoam.it/modules.php?name=hsaf. It contains, i.a.:- ATDD-2.0 (Algorithms Theoretical Definition Document- PUM-1.0 (Products User Manual).