EUMETSAT’s Contribution to COPS

Marianne Königmarianne.koenig@eumetsat.int

EUMETSAT’s Satellite Programmes in 2007

Geostationary Satellite Programme Meteosat Second Generation (Meteosat-8 or -9) Two satellites already in orbit, one is operational Imaging instruments SEVIRI (and GERB) Suite of meteorological parameters routinely extracted

Polar Satellite Programme European contribution to the Joint Polar System (EPS) (09:30 orbit) Imagers, sounders (IR, MW, RO), scatterometer, chemistry Latest confirmed launch date for Metop-A: 17 July 2006

Dissemination: Real-time via EUMETCast Archive retrieval (online from www.eumetsat.int)

SEVIRI: 12 Channel Instrument - Overview

0.6 m 0.8 m 1.6 m HRVIS

3.9 m 6.2 m 7.3 m 8.7 m

9.7 m 10.8 m 12.0 m 13.4 m

SEVIRI: Some “Technical” Details

Full disk scan every 15 minutes Image size: 3712 x 3712 pixels (5568 x 11136 for HRV) Resulting pixel sampling distance: 3 km at subsatellite

point (1 km HRV) Planned scenario:

One of the two MSG satellites will always be the operational satellite (15 min / full disk) while the other one is the hot stand-by.The stand-by satellite can be used for “rapid scans” (planned for 2008, but could be done for COPS upon written request to Director of Operations)

SEVIRI: Some “Technical” Details

SEVIRI: Meteorological Products of Interest

Pixel Cloud Mask (cloud/no cloud flag + quality) Atmospheric Motion Vectors and Divergence Atmospheric Instability (pre-convective) Further Cloud Parameters: phase, effective radius,

optical depth, cloud top pressure ….

Example for Atmospheric Motion Vectors / Divergence

Example for Atmospheric Instability Information (1)

Lifted Index: Temperature difference of air temperature at 500 hPa and temperature of air parcel lifted to 500 hPa

Example for Atmospheric Instability Information (2)

Additional Cloud Products Possible with SEVIRI

Quantitative:

An optimal estimation algorithm has been developed to derive parameters like reff, optical depth, cloud phase, and cloud top pressure from the multispectral image data (VIS and IR)

The example shows ship tracks in the South Atlantic (i.e. smaller cloud particles) in a colour combination of VIS0.8, IR3.9, IR10.8

Additional Cloud Products: Example of a Life Cycle of a Convective Cell of Moderate Strength

LNB

Tropopause

Some Remarks about the Meteorological Parameters

Within the operational processing, the products are done on a certain spatial and temporal resolution (depending on user requirements, CPU constraints, …)

The development team, however, can support COPS by reprocessing certain dates of interest on a finer scale (POC here: Marianne König)

That would also support ongoing validation of the products

The Metop Satellite

The primary mission objective is the provision of temperature and humidity profiles with improved accuracy and vertical resolution (1K and 10% @ 1 km vertical resolution, respectively)

Further mission objectives are related to the measurement of trace gases (ozone, methane, carbon monoxide, ...) as well as surface and cloud properties

IASI is based on a Michelson interferometer. Selected spectral range: 3.6 to 15.5 µm (645 to 2760 cm-1)Spectral sampling: 0.25 cm-1 giving 8461 spectral samples

IASI is nadir-viewing and across track scanning. 30 fields-of view along the scan line are sampled in 22 matrices of circular fields of view with a diameter of 12 km

IASI Mission and Measurement Principles

IASI – Spectral Coverage

Instrument Field-of-Views

IASIAMSU-AMHSHIRS/4AVHRR/3

Mapping of AVHRR and IASI IFOV

12Km 12Km

18Km

12Km

12Km

18Km

18Km

50 Km 50 Km

IASI Level 2 Products

For a best use of IASI measurements the level 2 processing can combine IASI with concurrent measurements of AVHRR, AMSU-A, MHS, and ATOVS level 2 products

Final level 2 products: Temperature profile at a minimum of 40 levels Humidity profile at a minimum of 20 levels Land/Sea surface temperature Surface emissivity at 12 spectral positions Ozone columns in 3 deep layers and total column Columnar amounts of N2O, CO, CH4, CO2

Cloud amount (up to three cloud formations) Cloud top temperature (up to three cloud formations) Cloud phase

Availability: via EUMETCast within 3h, via EUMETSAT Archive

Retrieval Simulation (Arctic Atmosphere)

EUMETSAT Data Access:Registration necessary

Contact ops@eumetsat.int

Thank you