The HPXO89 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HP): Pressure A1 (X): Global Area (area not definable) A2 (O): 120 hours forecast (5 days) T1ii (H89): Any parameter reduced to sea level (eg MSLP) (Remarks from Volume-C: H+ 120 (GLOBAL MODEL) MEAN SEA LEVEL PRESSURE)

The HHXK40 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (K): 72 hours forecast T1ii (H40): 400 hPa (Remarks from Volume-C: H+ 72 (GLOBAL MODEL) HEIGHT 400 HPA)

The HUXD20 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (D): 18 hours forecast T1ii (H20): 200 hPa (Remarks from Volume-C: H+ 18 (GLOBAL MODEL) WIND COMPONENT 200 HPA)

The HHXS70 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (S): 168 hours forecast T1ii (H70): 700 hPa (Remarks from Volume-C: H+ 168 (GLOBAL MODEL) HEIGHT 700 HPA)

The HUXE98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (E): 24 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 24 (GLOBAL MODEL) WIND COMPONENT 10 METRES)

The HHXR85 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (R): 156 hours forecast (7 days) T1ii (H85): 850 hPa (Remarks from Volume-C: H+ 156 (GLOBAL MODEL) HEIGHT 850 HPA)

The HUXD98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (D): 18 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 18 (GLOBAL MODEL) WIND COMPONENT 10 METRES)

The HRXF30 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HR): Relative humidity A1 (X): Global Area (area not definable) A2 (F): 30 hours forecast T1ii (H30): 300 hPa (Remarks from Volume-C: H+ 30 (GLOBAL MODEL) RELATIVE HUMIDITY 700 HPA)

The HUXB98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (B): 6 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 06 (GLOBAL MODEL) WIND COMPONENT 10 METRES)

The HUXL60 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HU): Eastward wind component A1 (X): Global Area (area not definable) A2 (L): 84 hours forecast T1ii (H60): 600 hPa (Remarks from Volume-C: H+ 84 (GLOBAL MODEL) WIND COMPONENT 600 HPA)