EUMETSAT’s Contribution to COPS
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EUMETSAT’s Contribution to COPS. Marianne König [email protected]. 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) - PowerPoint PPT Presentation
Transcript of EUMETSAT’s Contribution to COPS
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)
