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! (C) Copyright 2005- ECMWF.
!
! This software is licensed under the terms of the Apache Licence Version 2.0
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
!
! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
!
!
! FORTRAN 90 Implementation: bufr_read_synop
!
! Description: how to read SYNOP BUFR messages.
! Please note that SYNOP reports can be encoded in various ways in BUFR. Therefore the code
! below might not work directly for other types of SYNOP messages than the one used in the
! example. It is advised to use bufr_dump first to understand the structure of these messages.
!
!
program bufr_read_synop
use eccodes
implicit none
integer :: ifile
integer :: iret
integer :: ibufr
integer :: count=0
integer(kind=4) :: blockNumber,stationNumber
real(kind=8) :: lat,t2m,td2m,ws,wdir
integer(kind=4) :: cloudAmount,cloudBaseHeight,lowCloud,midCloud,highCloud
call codes_open_file(ifile,'../../data/bufr/syno_multi.bufr','r')
! The first bufr message is loaded from file,
! ibufr is the bufr id to be used in subsequent calls
call codes_bufr_new_from_file(ifile,ibufr,iret)
do while (iret/=CODES_END_OF_FILE)
write(*,*) 'message: ',count
! We need to instruct ecCodes to expand all the descriptors
! i.e. unpack the data values
call codes_set(ibufr,"unpack",1)
!read and print some data values. This example was written
! for a SYNOP BUFR file!
! wmo block number
call codes_get(ibufr,'blockNumber',blockNumber)
write(*,*) ' blockNumber:',blockNumber
! station number
call codes_get(ibufr,'stationNumber',stationNumber)
write(*,*) ' stationNumber:',stationNumber
! location
call codes_get(ibufr,'latitude',lat)
write(*,*) ' latitude:',lat
call codes_get(ibufr,'longitude',lat)
write(*,*) ' longitude:',lat
! 2m temperature
call codes_get(ibufr,'airTemperatureAt2M',t2m);
write(*,*) ' airTemperatureAt2M:',t2m
! 2m dewpoint temperature
call codes_get(ibufr,'dewpointTemperatureAt2M',td2m);
write(*,*) ' dewpointTemperatureAt2M:',td2m
! 10m wind
call codes_get(ibufr,'windSpeedAt10M',ws);
write(*,*) ' windSpeedAt10M:',ws
call codes_get(ibufr,'windDirectionAt10M',wdir);
write(*,*) ' windDirectionAt10M:',wdir
! The cloud information is stored in several blocks in the
! SYNOP message and the same key means a different thing in different
! parts of the message. In this example we will read the first
! cloud block introduced by the key
! verticalSignificanceSurfaceObservations=1.
! We know that this is the first occurrence of the keys we want to
! read so we will use the # (occurrence) operator accordingly.
! Cloud amount (low and middleclouds)
call codes_get(ibufr,'#1#cloudAmount',cloudAmount)
write(*,*) ' cloudAmount (low and middle):',cloudAmount
! Height of cloud base
call codes_get(ibufr,'#1#heightOfBaseOfCloud',cloudBaseHeight)
write(*,*) ' heightOfBaseOfCloud:',cloudBaseHeight
! Cloud type (low clouds)
call codes_get(ibufr,'#1#cloudType',lowCloud)
write(*,*) ' cloudType (low):',lowCloud
! Cloud type (middle clouds)
call codes_get(ibufr,'#2#cloudType',midCloud)
write(*,*) ' cloudType (middle):',midCloud
! Cloud type (high clouds)
call codes_get(ibufr,'#3#cloudType',highCloud)
write(*,*) ' cloudType (high):',highCloud
! Release the bufr message
call codes_release(ibufr)
! Load the next bufr message
call codes_bufr_new_from_file(ifile,ibufr,iret)
count=count+1
end do
! Close file
call codes_close_file(ifile)
end program bufr_read_synop
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