EARS-IASI

EARS-IASI collects IASI instrument data from Metop satellite-passes via a network of HRPT stations and retransmits Level 1c and pilot Level 2 products.

Press Release - Metop-B - IASI Spectra (thumbnail)

The primary objective of the Infrared Atmospheric Sounding Interferometer (IASI) instrument measurements is to provide atmospheric emission spectra to derive temperature and humidity profiles with high vertical resolution and accuracy.

Additionally, it is used for the determination of trace gases such as ozone, nitrous oxide, carbon dioxide and methane, as well as land- and sea surface temperature and emissivity and cloud properties.

More about the IASI instrument

EARS-IASI Level 1 Service Specification

 

Geographical coverage

EARS IASI Geographical Coverage Map Core

Satellites supported

Metop-A and Metop-B, as shown on the tables on the Regional Data Service/EARS webpage.

Product Processing

Level 1 processing using OPS-LRS as provided by the NWP SAF. Principal Component Scores, channel selection and BUFR conversion using AAPP as provided by NWP SAF.

Product Segmentation

One file per station per pass.

Products via EUMETCast Europe

Calibrated and geolocated IASI observations in a combined product containing both 300 Principal Component Scores and 500 original IASI Channels, cloud/scene analysis information, BUFR formatted.

Timeliness via EUMETCast

30 minutes.

Products via RMDCN/GTS

As for EUMETCast.

Archived in EUMETSAT

None.

EARS-IASI Level 2 Operational Pilot Specification

The EARS-IASI Level 2 pilot adds to the existing EARS-IASI service and the products are currently generated where possible for the same stations and the same overpasses as the EARS-IASI Level 1 service.

Geographical coverage

Same as Level 1

Satellites supported

Metop-A and Metop-B, as shown on the tables on the Regional Data Service/EARS webpage.

Product Processing

Inputs: EARS-IASI L1 products and corresponding EARS-ATOVS AMSU-A and MHS products.

Level 2 processing using the same statistical retrieval function PWLR3 (Piece Wise Linear Regression -cube) as for the IASI L2 global products processor, developed by EUMETSAT.

Product Segmentation

One file per station per pass.

Products via EUMETCast Europe

Water vapour and temperature profiles as well as land surface temperature, sea surface temperature, land surface emissivity and surface pressure at individual IASI FoV resolution, together with corresponding quality indicators; in HDF-5 format.

Timeliness via EUMETCast

30 minutes.

Products via RMDCN/GTS

None

Archived in EUMETSAT

None.

Further information

For more information on EARS-IASI see TD 14 - EUMETSAT Advanced Retransmission Service Technical Description (PDF,2 MB)

Full details on products can be found in the Product Navigator:
IASI Regional Data Service Level 1 – 500 Selected Channels and Principal Component Scores – Metop

 
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