Basic information
National Focal Point on WIS matters from Tunisia: Mr Ahmed HMAM (ahmed.hmam@meteo.tn)
02/18: an email to Tunisia NFP on WIS matters
Issue: It is reported by ECMWF colleagues that Radiosonde BUFR data from two stations in Tunisia are missing the block number.
Block number is missing (snapshot as below) (I also attach BUFR data for your reference)
Station information is shown below:
CCCC is DTTA
Station Number 1: 60715
Station Number 2: 60760
TTAAii is: IUSD01 & IUKD01
The IU[KS]D02 reports from DTTA started on 2021-11-23.
The IU[KS]D01 reports from DTTA started over a year ago.
Request: Could you please help add the block number into the BUFR? Only in this way, the BUFR data can be used for further processing in NWP models.
03/08: a follow-up email (one from Xiaoxia in English, the other from Hassan in French)
03/11: feedback from Mr Ahmed (in French):
To check with IBL software (vendor) for assistance to figure out whether it is related to the migration to the new message switch which has been in operation since the end of November 2021
03/11: feedback from Bruce (ECMWF) (in French)
correct BUFR messages from both 60715 and 60760 have never been received
maybe it is a problem with PC settings at the stations
03/12: feedback from Mr Ahmed (in French)
so the problem has been around for a long time, no complaints were received before this issue was reported recently
to review the station configuration
03/22: feedback from Bruce (ECMWF) (in English)
good BUFR data from both radiosonde stations
problem: various BUFR messages for the same ascents - more than necessary
recommendation: to use template 309057 (with as many levels as possible)
03/22: question 1: metadata description (from GISC Offenbach)
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 (Remarks from Volume-C: NilReason)
The IUSD02 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 (Remarks from Volume-C: NilReason)
The IUKD01 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 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
The IUKD02 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 (D): 90°E - 0° northern hemisphere (Remarks from Volume-C: NilReason)
...