mirror of https://github.com/ecmwf/eccodes.git
111 lines
3.8 KiB
Fortran
111 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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! Description: How to read SYNOP BUFR messages.
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!
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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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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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do while (.true.)
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call codes_bufr_new_from_file(ifile, ibufr, iret)
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if (iret == CODES_END_OF_FILE) exit
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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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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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