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language | cpp |
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title | bufr_read_temp.c |
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linenumbers | false |
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| /*
* 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.
*
*/
/*
* 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.
*/
#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;
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).
*
* In our BUFR message verticalSoundingSignificance is always followed by
* geopotential, airTemperature, dewpointTemperature,
* windDirection, windSpeed and pressure.
* So in order to access any of these keys we need to use the
* condition: verticalSoundingSignificance=4.
* /
/* 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 geopotential */
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;
}
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| Code Block |
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language | none |
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title | bufr_read_temp.f90 |
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linenumbers | false |
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| !
!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.
!
! Please note that SYNOPTEMP 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 thethese messages.
program bufr_read_temp
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).
!
! In our BUFR message verticalSoundingSignificance is always followed by
! geopotential, airTemperature, dewpointTemperature,
! windDirection, windSpeed and pressure.
!
! So in order to access any of these keys we need to use the
! condition: verticalSoundingSignificance=4.
! ---- Get the number of the temperature significant levels pressure ---------------------------
! We find out the number of temperature significant levels by
! counting how many pressure values we have on these levels.
keyName="/call codes_get(ibufr,'/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
',presVal);
! write(*,*) "inconsistent number of temperature values found!"---- Get gepotential ------------------------
call exit(1)
end if codes_get(ibufr,'/verticalSoundingSignificance=4/geopotential',geoVal)
! ---- getGet the valuestemperature --------------------------------
call codes_get(ibufr,keyName'/verticalSoundingSignificance=4/airTemperature',tVal)
! ---- Get dew point temperature -----------------------
call codes_get(ibufr,'/verticalSoundingSignificance=4/dewpointTemperature',tdVal)
keyName="/verticalSoundingSignificance=4/dewpointTemperature"
! ---- Check the that all arrays are same size
call codes_get_size(ibufr,keyName,num)
if (num /= numSigTif (size(presVal)/=size(geoVal) .or. size(tVal)/=size(tdVal) .or. size(tdVal)/=size(presVal)) then
print write(*,*) "'inconsistent number of dew point temperature values found!"
array dimension'
call exit(1)
end if
endif
! get the values
call codes_get(ibufr,keyName,tdVal) num=size(presVal)
! ---- Print the values --------------------------------
write(*,*) 'level pres geo t td'
write(*,*) "--------------------------------------"
do i=1,numSigT num
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_read_temp
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| Code Block |
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language | python |
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title | bufr_read_temp.py |
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linenumbers | false |
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| # 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.
#
#
# 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='../../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_double_array(gid,"/verticalSoundingSignificance=4/pressure")
# Get gepotential
sigt_geo=codes_get_double_array(gid,"/verticalSoundingSignificance=4/geopotential")
if len(sigt_geo) != numSigT :
print "inconstitent number of geopotential values found!"
return 1=4/geopotential")
# Get temperature
sigt_t=codes_get_double_array(gid,"/verticalSoundingSignificance=4/airTemperature")
if len(sigt_t) != numSigT :
# Get dew point
print "inconstitent number of temprature values found!" sigt_td=codes_get_double_array(gid,"/verticalSoundingSignificance=4/dewpointTemperature")
# Check that all return 1
# Get dew point
arrays are same size
if len(sigt_pres) != numSigT or len(sigt_td=codes_get_double_array(gid,"/verticalSoundingSignificance=4/dewpointTemperature")
ifgeo) != numSigT or len(sigt_t) != numSigT or len(sigt_td) != numSigT :
print "inconstitent number of dewpoint temperature values found!" 'inconsistent array dimension'
return 1
# Print the values
print "lev pres geo t td"
print "-------------------------------"
for i in xrange(numSigT):
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())
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