The HHXS10 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 (H10): 100 hPa (Remarks from Volume-C: H+ 168 (GLOBAL MODEL) HEIGHT 100 HPA)

The HHXI40 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (I): 48 hours forecast T1ii (H40): 400 hPa (Remarks from Volume-C: H+ 48 (GLOBAL MODEL) HEIGHT 400 HPA)

The HHXD50 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HH): Height A1 (X): Global Area (area not definable) A2 (D): 18 hours forecast T1ii (H50): 500 hPa (Remarks from Volume-C: H+ 18 (GLOBAL MODEL) HEIGHT 500 HPA)

The HVXS20 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (S): 168 hours forecast T1ii (H20): 200 hPa (Remarks from Volume-C: H+ 168 (GLOBAL MODEL) WIND COMPONENT 200 HPA)

The HOXA70 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HO): Vertical velocity A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H70): 700 hPa (Remarks from Volume-C: H+ 00 (GLOBAL MODEL) VERTICAL VELOCITY 700 HPA)

The HVXL98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (L): 84 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 84 (GLOBAL MODEL) WIND COMPONENT 10 METRES)

The HVXN25 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (N): 108 hours forecast T1ii (H25): 250 hPa (Remarks from Volume-C: H+ 108 (GLOBAL MODEL) WIND COMPONENT 250 HPA)

The HVXN70 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HV): Northward wind component A1 (X): Global Area (area not definable) A2 (N): 108 hours forecast T1ii (H70): 700 hPa (Remarks from Volume-C: H+ 108 (GLOBAL MODEL) WIND COMPONENT 700 HPA)

The HGXE92 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HG): Divergence A1 (X): Global Area (area not definable) A2 (E): 24 hours forecast T1ii (H92): 925 hPa (Remarks from Volume-C: H+ 24 (GLOBAL MODEL) DIVERGENCE 925 HPA)

The HRXQ50 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HR): Relative humidity A1 (X): Global Area (area not definable) A2 (Q): 144 hours forecast T1ii (H50): 500 hPa (Remarks from Volume-C: H+ 144 (GLOBAL MODEL) RELATIVE HUMIDITY 500 HPA)