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 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.