Progress

Owned by Xiaoxia Chen
Last updated: Mar 22, 2022
3 min read

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)