The ISAD30 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IS): Surface/sea level T1T2A1 (ISA): N-minute observations from automatic (fixed or mobile) land stations A2 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
The IUKN40 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUK): Radio soundings from marine stations (up to 100 hPa) A2 (N): Northern hemisphere (Remarks from Volume-C: NilReason)
The IUXD40 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUX): Other upper air reports A2 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
The IUXD01 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUX): Other upper air reports A2 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
The IUSN40 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUS): Radio soundings from marine stations (entire sounding) A2 (N): Northern hemisphere (Remarks from Volume-C: NilReason)
The IUXN40 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUX): Other upper air reports A2 (N): Northern hemisphere (Remarks from Volume-C: NilReason) - not for operational use
The LAGL31 TTAAii Data Designators decode as: T1 (L): Aviation Information in XML A1A2 (GL): Greenland T1T2 (LA): Aviation routine reports ("METAR") (Remarks from Volume-C: NilReason)
The LAQB31 TTAAii Data Designators decode as: T1 (L): Aviation Information in XML A1A2 (QB): Bosnia and Herzegovina T1T2 (LA): Aviation routine reports ("METAR") (Remarks from Volume-C: NilReason)
The LCGL31 TTAAii Data Designators decode as: T1 (L): Aviation Information in XML A1A2 (GL): Greenland T1T2 (LC): Aerodrome Forecast ("TAF") (VT<12 hours)" (Remarks from Volume-C: NilReason)
The LPDL34 TTAAii Data Designators decode as: T1 (L): Aviation Information in XML A1A2 (DL): Germany T1T2 (LP): Special Aviation weather reports("SPECI")(The bulletin collects reports from stations: EDZO;) (Remarks from Volume-C: NilReason)