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CPTEC procedure to decode FM94-BUFR Automatic Weather Station data for use in GEMPAK.

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CPTEC procedure to decode FM94-BUFR Automatic Weather Station data for use in GEMPAK.

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    1. CPTEC procedure to decode FM94-BUFR Automatic Weather Station data for use in GEMPAK. Sergio Henrique S. Ferreira Sergio.ferreira@cptec.inpe.br

    2. A Quick overview of FM94- BUFR BUFR – Binary Universal Form for representation of Meteorological Data is a WMO code that will replace the traditional Alfa-numeric codes such as SYNOP, SHIP, etc for data transfers through the Global Telecommunication System (GTS)

    4. BUFR Structure

    5. Codification process

    7. A Example of BUFRDUMP results :BUFR: # EDITION = 2 0 # MBUFR Error code :SEC1: 46 # CENTER: Brazilian Space Agency ­ INPE 0 # SUBCENTER 1 # UPDATE 0 # BUFR TYPE: Surface data — land 0 # INTERNATIONAL BUFR SUBTYPE 1 # LOCAL BUFR SUBTYPE 2 # BUFR MASTER TABLE 1 # BUFR LOCAL TABLE 2004 # YEAR 12 # MONTH 14 # DAY 12 # HOUR 0 # MINUTE :SEC3: 1 # Num.subsets 10 # Num.descriptors 0 # Flag for Compressed data (1=compressed 0=uncompressed) 307005 013021 013013 222000 101049 031031 001031 001201 101039 033007

    8. A Example of BUFRASCII results for Buoy data (The MS-Excel was used for read the result and present the data in the table form)

    9. The module MBUFR.f90

    10. Program example Use MBUFR type(sec1type)::sec1 type(sec3type)::sec3 type(sec4type)::sec4 integer::err, bufr_ed, nbytes call OPEN_MBUFR(1, “FILENAME.bufr", 46,13,0) 10 call READ_MBUFR(1,2000,sec1,sec3,sec4, bUFR_ED, NBYTES,err) if (( ioerr(1)==0).and.(err==0)) then do j =1,sec3%nsubsets write(*,*)(sec4%r(i,j),i=1,sec4%nvars) end do deallocate(sec4%r,sec4%d,sec4%c,sec3%d) goto 10 endif call close_mbufr (1) end

    11. The AWS data from INMET and CPTEC Most Automatic Weather Stations (AWS) do not have a WMO identification number. Because of this the data from these AWS(s) can not be encoded in a SYNOP. These data are encoded and available in BUFR. Inside the BUFR there is information of Latitude, Longitude and Altitude of station. Because of this it is not necessary to have a WMO number to locate the station.

    12. BUFR template used to encode AWS data

    13. Using BUFRASCII to decode AWS BUFR data and use in GEMPAK

    14. Example of INMET AWS data converted for use in GEMPAK

    15. Example of CPTEC AWS data converted for use in GEMPAK

    16. Meteorological data Available in BUFR

    17. Decoding multi BUFR templates

    18. MBUFR2NETCDFODS

    19. http://www.wmo.ch/pages/prog/www/WMOCodes.html http://www.wmo.int/pages/prog/www/WMOCodes/TemplateExamples.html

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