NOAA KLM User's Guide
Section 8.3.1.5
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8.3.1.5 HIRS Data Sets
This section describes the characteristics and formats of the High Resolution Infrared Radiation Sounder (both HIRS/3 and HIRS/4) data sets for
both NOAA KLM (Version 2) and NOAA-N (Version 4) satellites. Version 2 formats (v2) were used on all NOAA KLM data until April 28, 2005. After
this date, the Version 3 format (v3), also known as the NOAA-N format, was implemented for all operational POES spacecraft. There is no plan
at this time to reprocess archived data into the new format. On January 25, 2006, Version 4 (v4) was implemented to reflect the start of
CLAVR-x (Cl ouds from AV HR R E x tended cloud mask) processing which began on that date.
Amended April 19, 2004
Amended January 6, 2005
Amended April 12, 2005
Amended May 4, 2005
Amended December 7, 2006