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Description

This example shows: how to read levels from TEMP BUFR messages.


Example BUFR filePraticaTemp.bufr

Source code

 

!
!Copyright 2005-2015 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.
!
!
! FOTRAN 90 Implementation: bufr_read_temp
!
! Description: how to read levels from TEMP BUFR messages.
!
! Please note that TEMP reports can be encoded in various ways in BUFR. Therefore the code
! below might not work directly for other types of TEMP 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_temp
  use eccodes
  implicit none
  integer            :: ifile
  integer            :: iret,ierr
  integer            :: ibufr
  integer            :: i, count=0
  integer(kind=4),dimension(:), allocatable  :: timePeriod,extendedVerticalSoundingSignificance
  integer(kind=4)  :: blockNumber,stationNumber,numberOfLevels
  character(len=30) :: str
  real(kind=8),dimension(:), allocatable :: pressure,airTemperature,dewpointTemperature
  real(kind=8),dimension(:), allocatable :: geopotentialHeight,latitudeDisplacement,longitudeDisplacement
  real(kind=8),dimension(:), allocatable :: windDirection,windSpeed
  character(len=128)   :: keyName
  call codes_open_file(ifile,'PraticaTemp.bufr','r')
  !call codes_open_file(ifile,'temp.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
    call codes_set(ibufr,'unpack',1)
    call codes_get(ibufr,'timePeriod',timePeriod)
    call codes_get(ibufr,'pressure',pressure)
    call codes_get(ibufr,'extendedVerticalSoundingSignificance',extendedVerticalSoundingSignificance)
    call codes_get(ibufr,'geopotentialHeight',geopotentialHeight)
    call codes_get(ibufr,'latitudeDisplacement',latitudeDisplacement)
    call codes_get(ibufr,'longitudeDisplacement',longitudeDisplacement)
    call codes_get(ibufr,'airTemperature',airTemperature)
    call codes_get(ibufr,'dewpointTemperature',dewpointTemperature)
   call codes_get(ibufr,'windDirection',windDirection)
    call codes_get(ibufr,'windSpeed',windSpeed)
    call codes_get(ibufr,'blockNumber',blockNumber)
    call codes_get(ibufr,'stationNumber',stationNumber)
    print *,'station',blockNumber,stationNumber
    print *,'timePeriod pressure geopotentialHeight latitudeDisplacement &
          &longitudeDisplacement airTemperature windDirection windSpeed significance'
    do i=1,size(windSpeed)
      write(*,'(I5,6X,F9.1,2X,F9.2,10X,F8.2,14X,F8.2,16X,F8.2,6X,F8.2,4X,F8.2,4X,I0)') timePeriod(i),pressure(i),&
          &geopotentialHeight(i),latitudeDisplacement(i),&
          &longitudeDisplacement(i),airTemperature(i),windDirection(i),windSpeed(i),extendedVerticalSoundingSignificance(i)
    enddo
    ! free arrays 
    deallocate(timePeriod)
    deallocate(pressure)
    deallocate(geopotentialHeight)
    deallocate(latitudeDisplacement)
    deallocate(longitudeDisplacement)
    deallocate(airTemperature)
    deallocate(dewpointTemperature)
    deallocate(windDirection)
    deallocate(windSpeed)
    deallocate(extendedVerticalSoundingSignificance)
    ! 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_temp
#
# Copyright 2005-2015 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.
#
# Python implementation: bufr_read_temp
#
# Description: how to read levels from TEMP BUFR
# messages.
#
#
# Please note that TEMP reports can be encoded in various ways in BUFR.
# Therefore the code below might not work directly for other types of TEMP
# messages than the one used in the example. It is advised to use bufr_dump to
# understand the structure of the messages.
#
import traceback
import sys
from eccodes import *
INPUT = 'PraticaTemp.bufr'
VERBOSE = 1  # verbose error reporting

def example():
    # open bufr file
    f = open(INPUT)
    cnt = 0
    # loop for the messages in the file
    while 1:
        # get handle for message
        bufr = codes_bufr_new_from_file(f)
        if bufr is None:
            break
        print "message: %s" % cnt
        # we need to instruct ecCodes to expand all the descriptors
        # i.e. unpack the data section
        codes_set(bufr, 'unpack', 1)
        #get all the timePeriods
        timePeriod = codes_get_array(bufr, "timePeriod")
        pressure = codes_get_array(bufr, "pressure")
        extendedVerticalSoundingSignificance = codes_get_array(bufr, "extendedVerticalSoundingSignificance")
        geopotentialHeight = codes_get_array(bufr, "geopotentialHeight")
        latitudeDisplacement = codes_get_array(bufr, "latitudeDisplacement")
        longitudeDisplacement = codes_get_array(bufr, "longitudeDisplacement")
        airTemperature = codes_get_array(bufr, "airTemperature")
        dewpointTemperature = codes_get_array(bufr, "dewpointTemperature")
        windDirection = codes_get_array(bufr, "windDirection")
        windSpeed = codes_get_array(bufr, "windSpeed")
        blockNumber = codes_get(bufr, "blockNumber")
        stationNumber = codes_get(bufr, "stationNumber")
        print 'station %d%d' % (blockNumber,stationNumber)
        print 'timePeriod pressure geopotentialHeight latitudeDisplacement longitudeDisplacement airTemperature windDirection windSpeed significance'
        for i in range(0,len(windSpeed)-1):
          print timePeriod[i],pressure[i],geopotentialHeight[i],latitudeDisplacement[i],longitudeDisplacement[i],airTemperature[i],windDirection[i],windSpeed[i],extendedVerticalSoundingSignificance[i]
        cnt += 1
        # delete handle
        codes_release(bufr)
    # close the file
    f.close()

def main():
    try:
        example()
    except CodesInternalError, err:
        if VERBOSE:
            traceback.print_exc(file=sys.stderr)
        else:
            print >>sys.stderr, err.msg
        return 1
if __name__ == "__main__":
    sys.exit(main())

 

 

 

 

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