eccodes/examples/F90/bufr_subset.f90

76 lines
2.2 KiB
Fortran
Raw Normal View History

2020-01-28 14:32:34 +00:00
! (C) Copyright 2005- ECMWF.
2015-02-09 12:30:11 +00:00
!
! This software is licensed under the terms of the Apache Licence Version 2.0
2020-01-28 14:32:34 +00:00
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
2015-02-09 12:30:11 +00:00
!
! 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.
!
!
! Description: how to read data values from a given subset of a BUFR message.
!
!
program bufr_subset
use eccodes
implicit none
integer :: ifile
integer :: iret
integer :: ibufr
integer :: i, count = 0
integer(kind=4) :: numberOfSubsets
integer(kind=4) :: blockNumber, stationNumber
character(100) :: key
2021-11-30 13:01:07 +00:00
!real(kind=8) :: t2m
2015-02-09 12:30:11 +00:00
call codes_open_file(ifile, '../../data/bufr/synop_multi_subset.bufr', 'r')
2015-02-09 12:30:11 +00:00
2021-11-13 17:40:27 +00:00
! 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)
2015-02-09 12:30:11 +00:00
do while (iret /= CODES_END_OF_FILE)
2016-12-29 15:53:10 +00:00
2021-11-13 17:40:27 +00:00
! Get and print some keys from the BUFR header
write (*, *) 'message: ', count
2015-02-09 12:30:11 +00:00
! We need to instruct ecCodes to expand all the descriptors
! i.e. unpack the data values
2022-12-28 15:12:46 +00:00
call codes_set(ibufr, 'unpack', 1);
! Find out the number of subsets
call codes_get(ibufr, 'numberOfSubsets', numberOfSubsets)
write (*, *) ' numberOfSubsets:', numberOfSubsets
2016-12-29 15:53:10 +00:00
! Loop over the subsets
do i = 1, numberOfSubsets
2016-12-29 15:53:10 +00:00
100 format('/subsetNumber=', I5.5, '/blockNumber')
write (key, 100) I
write (*, *) key
2016-12-29 15:53:10 +00:00
write (*, *) ' subsetNumber:', i
! read and print some data values
2017-02-06 16:45:30 +00:00
2022-12-28 15:12:46 +00:00
call codes_get(ibufr, key, blockNumber);
write (*, *) ' blockNumber:', blockNumber
2017-02-06 16:45:30 +00:00
write (key, *) '/subsetNumber=', I, '/stationNumber'
2022-12-28 15:12:46 +00:00
call codes_get(ibufr, 'stationNumber', stationNumber);
write (*, *) ' stationNumber:', stationNumber
2017-02-06 16:45:30 +00:00
end do
2016-12-29 15:53:10 +00:00
2021-11-13 17:40:27 +00:00
! Release the BUFR message
call codes_release(ibufr)
2016-12-29 15:53:10 +00:00
2021-11-13 17:40:27 +00:00
! Load the next BUFR message
call codes_bufr_new_from_file(ifile, ibufr, iret)
2015-02-09 12:30:11 +00:00
count = count + 1
2016-12-29 15:53:10 +00:00
end do
2015-02-09 12:30:11 +00:00
! Close file
call codes_close_file(ifile)
2015-02-09 12:30:11 +00:00
end program bufr_subset