EARS-VIIRS

The EARS-VIIRS service collects data from the VIIRS instrument onboard the JPSS spacecrafts, operated by NASA and NOAA.

VIIRS M-Band True Colour RGB 750 m pixel size

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a scanning radiometer, which collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean colour, sea and land surface temperature, ice motion and temperature, fires, and the Earth's albedo.

Climatologists use VIIRS data to improve our understanding of global climate change. The NASA JPSS webpages have more details.

The provision of VIIRS data in the form of an EARS service is a logical extension of the EARS-AVHRR service, providing operational imager data with high timeliness for nowcasting applications.

EARS-VIIRS Service Specification

 

Geographical coverage

EARS VIIRS Geographical Coverage Map Core

Satellites supported

Suomi-NPP and NOAA-20*, as shown on the tables on the Regional Data Service/EARS webpage.

*NOAA-20 data are currently in trial dissemination mode.

Product Processing

RT-STPS as provided by NASA and CSPP as provided by CIMSS, configured and run by EUMETSAT. CVIIRS as provided by EUMETSAT for compaction of data.

Product Segmentation

Segments each containing one granule of observations (~85.6s).

Duplicate segments removed before dissemination.

Products via EUMETCast Europe

Currently two products*:

  • All 16 VIIRS M-Band channels.
  • The VIIRS Day/Night Band covering dusk, dawn and night time scenes, but excluding day time scenes.

Compact VIIRS SDR (Sensor Data Record) HDF5 product format containing calibrated radiances and geolocation information on tie-point grid. Geolocation to reference ellipsoid and not to terrain model. No observation thinning, lossless compression. Compact VIIRS SDR Product Format User Guide (PDF, 3 MB)

CVIIRS tool

The CVIIRS tool is made available by EUMETSAT to enable users to reconstruct the original NOAA VIIRS SDR product format from the Compact VIIRS SDR.

Latest version of the tool

The CVIIRS 2.0.1 release unifies features from the previous versions of CVIIRS. The tool is now available for users: Linux 32-bit, Linux 64-bit, Windows 32-bit and Windows 64-bit.

Timeliness via EUMETCast

30 minutes, target 15 minutes.

Products via RMDCN/GTS

None.

Archived in EUMETSAT

None.

Further information

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

Full details on products can be found in the Product Navigator:
VIIRS Regional Data Service

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