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