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 RATE

ERRORESTIMATE

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

Qu

ality c

on

trol

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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).