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.
 */

/*
 * C Implementation: bufr_read_temp
 *
 * Description: how to read temperature significant levels from TEMP BUFR messages.
 *
 */

#include "eccodes.h"


int main(int argc,char* argv[])
{
  FILE* in = NULL;

  /* message handle. Required in all the eccodes calls acting on a message.*/
  codes_handle* h=NULL;

  char* units= NULL;
  char* unitsPercent= NULL;
  double *sigt_pres=NULL, *sigt_geo=NULL, *sigt_t=NULL;
  double *sigt_td=NULL;
  long longVal;
  double doubleVal;
  size_t sigt_len=0, desc_len=0, len=0;
  int i, err=0;
  int cnt=0;
  char* infile = "../../data/bufr/temp_101.bufr";
  char key_name[128];

  in=fopen(infile,"r");
  if (!in) {
    printf("ERROR: unable to open file %s\n", infile);
    return 1;
  }

  /* loop over the messages in the bufr file */
  while ((h = codes_handle_new_from_file(NULL,in,PRODUCT_BUFR,&err)) != NULL || err != CODES_SUCCESS)
  {
    if (h == NULL) {
      printf("Error: unable to create handle for message %d\n",cnt);
      cnt++;
      continue;
    }

    printf("message: %d\n",cnt);

    /* we need to instruct ecCodes to expand the descriptors 
     i.e. unpack the data values */
    CODES_CHECK(codes_set_long(h,"unpack",1),0);

    /* In what follows we rely on the fact that for 
     temperature significant levels the value of key 
     verticalSoundingSignificance is 4 (see flag table 8001 for details).
       
     We also make use of the fact that in our BUFR message
     verticalSoundingSignificance is always followed by geopotential, 
     airTemperature, dewpointTemperature,
     windDirection, windSpeed and pressure. */

    /* Get the number of the temperature significant levels.*/

    /* We find out the number of temperature significant levels by 
     counting how many pressure values we have on these levels. */
         
    sprintf(key_name,"/verticalSoundingSignificance=4/pressure");
    CODES_CHECK(codes_get_size(h,key_name,&sigt_len),0);

    printf("Number of T significant levels: %ld\n",sigt_len);

    /* Allocate memory for the values to be read. Each 
     parameter must have the same number of values. */
    sigt_pres = malloc(sigt_len*sizeof(double));
    sigt_geo = malloc(sigt_len*sizeof(double));
    sigt_t = malloc(sigt_len*sizeof(double));
    sigt_td = malloc(sigt_len*sizeof(double));
   
    /* Get pressure */
    
    sprintf(key_name,"/verticalSoundingSignificance=4/pressure");
   
    /* get the values */
    len=sigt_len;
    CODES_CHECK(codes_get_double_array(h,key_name,sigt_pres,&len),0);

    /* Get gepotential */

    sprintf(key_name,"/verticalSoundingSignificance=4/geopotential");

    /* check the size*/
    CODES_CHECK(codes_get_size(h,key_name,&len),0);
    if(len != sigt_len)
    {
      printf("inconsistent number of geopotential values found!\n");
      return 1;
    }    

    /* get the values */
    CODES_CHECK(codes_get_double_array(h,key_name,sigt_geo,&len),0);

    /* Get temperature */

    sprintf(key_name,"/verticalSoundingSignificance=4/airTemperature");

    /* check the size*/
    if(len != sigt_len)
    {
      printf("inconsistent number of temperature values found!\n");
      return 1;
    }    

    /* get the values */
    CODES_CHECK(codes_get_double_array(h,key_name,sigt_t,&len),0);

    /* Get dew point */

    sprintf(key_name,"/verticalSoundingSignificance=4/dewpointTemperature");

    /* check the size*/
    if(len != sigt_len)
    {
      printf("inconsistent number of dewpoint temperature values found!\n");
      return 1;
    }    

    /* get the values */
    CODES_CHECK(codes_get_double_array(h,key_name,sigt_td,&len),0);

    /* Print the values */
    
    printf("lev  pres    geo    t    td\n");
    printf("-------------------------------\n");
    
    for(i=0; i < sigt_len; i++)
    {
        printf("%3d %6.0f %6.0f %.1f %.1f\n",
           i+1,sigt_pres[i],sigt_geo[i],sigt_t[i],sigt_td[i]);
    }

    /* delete handle */
    codes_handle_delete(h);

    /*Release memory*/
    free(sigt_pres);
    free(sigt_geo);
    free(sigt_t);
    free(sigt_td);

    cnt++;
  }

  fclose(in);
  return 0;
}

!
!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 temperature significant levels from TEMP BUFR messages.
!
!
program bufr_print_data
use eccodes
implicit none
integer            :: ifile
integer            :: iret
integer            :: ibufr
integer            :: i, count=0
integer(kind=4)    :: numSigT
integer(kind=4)    :: num
real(kind=8), dimension(:), allocatable :: presVal,geoVal,tVal ,tdVal
character(len=128)   :: keyName

  call codes_open_file(ifile,'../../data/bufr/temp_101.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);
 
    ! In what follows we rely on the fact that for 
    ! temperature significant levels the value of key 
    ! verticalSoundingSignificance is 4 (see flag table 8001 for details).
       
    ! We also make use of the fact that in our BUFR message
    ! verticalSoundingSignificance is always followed by geopotential, 
    ! airTemperature, dewpointTemperature,
    ! windDirection, windSpeed and pressure. 

    ! ---- Get the number of the temperature significant levels ----

    ! We find out the number of temperature significant levels by 
    ! counting how many pressure values we have on these levels.
      
    keyName="/verticalSoundingSignificance=4/pressure"
    
    call codes_get_size(ibufr,keyName,numSigT);

    write(*,*) "Number of temperature significant levels:", numSigT

    ! Allocate memory for the values to be read. Each 
    ! parameter must have the same number of values.
    allocate(presVal(numSigT), stat=iret);
    allocate(geoVal(numSigT), stat=iret);
    allocate(tVal(numSigT), stat=iret);
    allocate(tdVal(numSigT), stat=iret);
    
    ! ---- Get pressure ---------------------------
        
    keyName="/verticalSoundingSignificance=4/pressure"
   
    ! get the value
    call codes_get(ibufr,keyName,presVal);

    ! ---- Get gepotential ------------------------
 
    keyName="/verticalSoundingSignificance=4/geopotential"

    !Check the size
    call codes_get_size(ibufr,keyName,num)
    if (num /= numSigT) then
    
      write(*,*) "inconsistent number of geopotential values found!"
      call exit(1)
    end if   

    ! get the values
    call codes_get(ibufr,keyName,geoVal)

    ! ---- Get temperature --------------------------------
 
    keyName="/verticalSoundingSignificance=4/airTemperature"

    !Check the size
    call codes_get_size(ibufr,keyName,num)
    if (num /= numSigT) then
    
      write(*,*) "inconsistent number of temperature values found!"
      call exit(1)
    end if   

    ! get the values
    call codes_get(ibufr,keyName,tVal)    
     
    ! ---- Get dew point temperature  -----------------------
  
    keyName="/verticalSoundingSignificance=4/dewpointTemperature"

    !Check the size
    call codes_get_size(ibufr,keyName,num)
    if (num /= numSigT) then
    
      write(*,*) "inconsistent number of dew point temperature values found!"
      call exit(1)
    end if   

    ! get the values
    call codes_get(ibufr,keyName,tdVal)        
     
    ! ---- Print the values --------------------------------
    
    write(*,*) 'level    pres    geo    t    td'
    write(*,*) "--------------------------------------" 
     
    do i=1,numSigT 
        write(*,*) i,presVal(i),geoVal(i),tVal(i),tdVal(i)
    end do 
     
    
    ! free arrays 
    deallocate(presVal)
    deallocate(geoVal)
    deallocate(tVal)
    deallocate(tdVal) 

    ! 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_print_data

# 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 temperature  significant levels from TEMP BUFR messages.
#
#

import traceback
import sys

from eccodes import *

INPUT='../../data/bufr/temp_101.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
        gid = codes_bufr_new_from_file(f)
        if gid is None: break

        print "message: %s" % cnt
        
        # we need to instruct ecCodes to expand all the descriptors
        # i.e. unpack the data values
        codes_set(gid,'unpack',1);
    
        # In what follows we rely on the fact that for 
        # temperature  significant levels the value of key 
        # verticalSoundingSignificance is 4 (see flag table 8001 for details).
       
        # We also make use of the fact that in our BUFR message
        # verticalSoundingSignificance is always followed by geopotential, 
        # airTemperature, dewpointTemperature,
        # windDirection, windSpeed and pressure. 
        
        # Get the number of the temperature significant levels.

        # We find out the number of temperature significant levels by 
        # counting how many pressure values we have on these levels. 
        
        numSigT=codes_get_size(gid,"/verticalSoundingSignificance=4/pressure")
        print  '  Number of temperature significant levels %ld' % (numSigT)
       
        # Get pressure 
    
        sigt_pres=codes_get_array(gid,"/verticalSoundingSignificance=4/pressure")
        
        # Get gepotential
      
        sigt_geo=codes_get_array(gid,"/verticalSoundingSignificance=4/geopotential")

        if len(sigt_geo) != sigTNum :
            print "inconstitent number of geopotential values found!"
            return 1
        
        # Get temperature 
    
        sigt_t=codes_get_array(gid,"/verticalSoundingSignificance=4/airTemperature")

        if len(sigt_t) != sigTNum :
            print "inconstitent number of temprature values found!"
            return 1
        
        # Get dew point

        sigt_td=codes_get_array(gid,"/verticalSoundingSignificance=4/dewpointTemperature")

        if len(sigt_td) != sigTNum :
            print "inconstitent number of dewpoint temperature  values found!"
            return 1
        
        # Print the values
    
        print "lev  pres    geo    t    td"
        print "-------------------------------"
    
        for i in xrange(sigTNum):
            print "%3d %6.0f %6.0f %.1f %.1f" % (i+1,sigt_pres[i],sigt_geo[i],sigt_t[i],sigt_td[i])

        cnt+=1

        # delete handle
        codes_release(gid)

    # 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())