The IUKD40 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 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
The IUKL01 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUK): Radio soundings from fixed land stations (up to 100 hPa) A2 (L): 90°E - 0° southern hemisphere (The bulletin collects reports from stations: 89526;PRINCESS ELISABETH;) (Remarks from Volume-C: Princess Elisabeth Station)
The IUSD01 TTAAii Data Designators decode as: T1 (I): Observational data (Binary coded) - BUFR T1T2 (IU): Upper air T1T2A1 (IUS): Radiosondes/pibal reports from fixed land stations (entire sounding) A2 (D): 90°E - 0° northern hemisphere(The bulletin collects reports from stations: 10035;Schleswig;) (Remarks from Volume-C: high resolution 2 sec.)