Release of a new version of CVIIRS

The new CVIIRS 2 is available to users of the regional EARS-VIIRS service.

Tuesday, 17 April 2018

EARS-VIIRS coverage

CVIIRS is the Compact VIIRS SDR conversion tool, developed by EUMETSAT. It creates products according to the Compact VIIRS SDR format specification from VIIRS SDR and non-terrain corrected geolocation files. Users of the EARS-VIIRS service receive data in the CVIIRS format and must decode the products either with their own reader or using the CVIIRS software.

The trial dissemination of NOAA-20 VIIRS data began on 16 April 2018. In order to expand this data, users will need to use the new CVIIRS 2. EUMETSAT will switch over processing of VIIRS SDRs from Suomi-NPP (S-NPP) to CVIIRS 2 on 2 May 2018. By this time, users will need to have migrated to CVIIRS 2 in order to be able to expand all EARS-VIIRS products. Because it is already possible to process current S-NPP VIIRS SDRs using CVIIRS 2, users are encouraged to migrate to the new software before the switchover.

Different versions of CVIIRS are currently in use for the M-Band and Day/Night-Band. CVIIRS 2 unifies features from the previous versions of CVIIRS. Notable new features include capabilities to:

  • Compact and expand M-, I- and Day/Night Band data with one tool.
  • Support multiple granules.
  • Handle corrupted data files.
  • Filter input files by filename-pattern and sensing time-range.
  • Support both S-NPP and NOAA-20 (JPSS-1).

Note: this version of CVIIRS breaks backwards compatibility with previous versions of CVIIRS because the command line API has been updated (i.e. the argument --cc has been replaced with -p). Due to various other improvements, products compacted by CVIIRS 2 cannot be expanded by earlier versions of CVIIRS. CVIIRS 2, however, is capable of processing data compacted with previous versions of CVIIRS.
Users should note that CVIIRS 2 requires longer processing times than previous versions of the software. A full list of the new features and known issues can be found in the README.txt file in the CVIIRS download.

The new version of CVIIRS, CVIIRS 2.0.2, can be downloaded from our Support Software and Tools page.

Test data produced using CVIIRS 2 are available on our FTP server:
ftp://ftp.eumetsat.int/pub/OPS/out/test-data/Test-data-for-External-Users/CVIIRS-2.0.1_Test-data/

Further information can be found in the Software User Manual and the Compact VIIRS SDR Product Format User Guide.

EARS-VIIRS data are distributed on EUMETCast Europe on the NPP-2 channel (PID: 500, Multicast address: 224.223.222.2)

Users not yet subscribed to EARS-VIIRS data and wishing to receive them should register via our Earth Observation Portal (EOP).

For more information, contact our User Service Helpdesk.

 
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