McIDAS-XCD Administrator's Guide
Version 2019.1

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Chapter 5

Decoding GRIB Messages

The McIDAS-XCD GRIB decoder converts the binary grid data in the NOAAPORT data stream sent by the National Weather Service (NWS) into McIDAS grid files. The McIDAS-XCD GRBFILER decoder puts this same data into GRIB1 and GRIB2 files referenced by a MySQL/MariaDB database and accessed by the GRIB server. This section describes the steps required to ingest and decode the data stream into McIDAS grid files and/or GRIB files.

• Processing the GRIB message
• Converting GRIB codes
• Creating McIDAS Grid Files with DMGRID
• Creating GRIB1 and GRIB2 Files with DMBIN

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