EARS-VASS (Vertical Atmospheric Sounding Service), complements the Metop and the US POES and SNPP/JPSS satellites currently covered by EARS.

EARS-VASS data example

EARS-VASS is composed of two products: Level 1b MWHS-II and MWTS-II. The data contain for all spectral channels and all Fields of view the calibrated and geolocated L1 data in BUFR format.

The MWHS-II instrument has the ability to perform the vertical atmosphere sounding also in cloudy conditions.

Like the MHS instrument on Metop and NOAA satellites, it focuses on the water vapour sounding of the upper troposphere, but also provides information on temperature profiles.

The MWTS-II instrument provides information on temperature profiles and is comparable to AMSU-A.

EARS-VASS Service Specification


Geographical coverage

EARS VIIRS Geographical Coverage Map Core

Satellites supported

FY-3D (MWHS, MHTS), as shown on the tables on the Regional Data Service/EARS webpage.

Product Processing

FY3_IPP as provided by the CMA, configured and run by EUMETSAT AAPP as provided by NWP-SAF.

Product Segmentation

One file per station pass and instrument.

Duplicate segments removed before dissemination.

Products via EUMETCast Europe

MWHS2 and MWTS2. All spectral channels, all Fields of View. Calibrated and geolocated. BUFR format.

Timeliness via EUMETCast

30 minutes.

Products via RMDCN/GTS

As for EUMETCast.

Archived in EUMETSAT


Further information

For more information on EARS-VASS see TD 14 - EUMETSAT Advanced Retransmission Service Technical Description (PDF,3 MB)

Full details on products can be found in the Product Navigator:
Regional Atmospheric Sounding Service – Feng-Yun - 3

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