GRIB2

GRIB:  GRIdded Binary

          data in the form of grid-point values expressed in binary form

GRIB1 v.s. GRIB2

1. GRIB1 Product Definition Section into the GRIB2 Identification, Product Definition, and Data Representation Sections.
2. Option for iterating the Sections and expansion of the concept of templates.

A single GRIB2 message structure:

Definition of A field in a GRIB2 message:

     a grid ,    for example, ht@500mb for fhr 12.

eg: If there are 500 hPa height field forecasts on a Northern Hemisphere polar

stereographic grid produced by a particular numerical model at forecast hours 12, 24, 36, and 48, then we have 4 fields, which can be saved in one single GRIB2 message.

EG: 500 hPa height field forecasts produced at forecast 24 hours on

four different grid projections.