1 1 Identification of originating/generating centre F1F2 for alphanumeric codes Operational 2 1 Identification of originating/generating centre F3F3F3 for alphanumeric codes Operational 3 1 Identification of originating/generating centre Code table 0 in GRIB Edition 1/Code table 0 01 033 for BUFR Edition 3 Operational 4 1 Identification of originating/generating centre Octet 5 in Section 1 of GRIB Edition 1/Octet 6 in Section 1 of BUFR Edition 3 Operational 5 2 Radiosonde/ sounding system used Code table 3685 - rara (Radiosonde/sounding system used) - for alphanumeric codes Operational 6 2 Radiosonde/ sounding system used Code table 0 02 011 (Radiosonde type) in BUFR Operational 7 3 Instrument make and type for water temperature profile measurement with fall rate equation coefficients Code table 1770 - IXIXIX (Instrument type for XBT, with fall rate equation coefficients) - for alphanumeric codes Operational 8 3 Instrument make and type for water temperature profile measurement with fall rate equation coefficients Code table 0 22 067 (Instrument type for water temperature/salinity profile measurement) in BUFR Operational 9 4 Water temperature profile recorder types Code table 4770 - XRXR (Recorder type) - for alphanumeric codes Operational 10 4 Water temperature profile recorder types Code table 0 22 068 (Water temperature profile recorder types) in BUFR Operational 11 5 Satellite identifier I6I6I6 for alphanumeric codes Operational 12 5 Satellite identifier Code table 0 01 007 in BUFR Operational 13 5 Satellite identifier Code used in GRIB Edition 2 Operational 14 6 List of units for TDCFs (Used only in Volume I.2, Parts B and C) Operational 15 7 Tracking technique/status of system used Code table 3872 - sasa for alphanumeric codes Operational 16 7 Tracking technique/status of system used Code table 0 02 014 in BUFR Operational 17 8 Satellite Instruments Code table 0 02 019 in BUFR Operational 18 11 Originating/generating centres BUFR 0 01 035 Operational 19 11 Originating/generating centres CREX Edition 2, ooooo in Group Poooooppp in Section 1 Operational 20 11 Originating/generating centres GRIB Edition 2, Octets 6-7 in Section 1 Operational 21 11 Originating/generating centres BUFR Edition 4, Octets 5-6 in Section 1 Operational 22 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 BUFR 0 01 034 Operational 23 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 BUFR Edition 3, Octet 5 in Section 1 Operational 24 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 BUFR Edition 4, Octets 7-8 in Section 1 Operational 25 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 GRIB Edition 1, Octet 26 in Section 1 Operational 26 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 GRIB Edition 2, Octets 8-9 in Section 1 Operational 27 12 Sub-centres of originating centres defined by entries in Common Code tables C-1 or C-11 CREX Edition 2, ppp in Group Poooooppp in Section 1 Operational 28 13 Data sub-categories of categories defined by entries in BUFR Table A BUFR Edition 4, Octet 12 in Section 1 (if = 255, it means other sub-category or undefined) Operational 29 13 Data sub-categories of categories defined by entries in BUFR Table A CREX Edition 2, mmm in Group Annnmmm of Section 1 Operational 30 14 Atmospheric chemical or physical constituent type Code Table 4.230 in GRIB 2 Operational