The HVXA50 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H50): 500 hPa (Remarks from Volume-C: XXX)

The HVXA25 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H25): 250 hPa (Remarks from Volume-C: XXX)

The HVXA02 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H02): 020 hPa (Remarks from Volume-C: XXX)

The HVXA05 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H05): 050 hPa (Remarks from Volume-C: XXX)

The HVXA30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H30): 300 hPa (Remarks from Volume-C: XXX)

The HTXG98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (G): 36 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: XXX)

The HUXA05 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H05): 050 hPa (Remarks from Volume-C: XXX)

The HVXA07 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H07): 070 hPa (Remarks from Volume-C: XXX)

The HTXJ98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (J): 60 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 60 (GLOBAL MODEL) TEMPERATURE 2 METRES)

The HVXA99 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H99): 1000 hPa (Remarks from Volume-C: XXX)