[Wrf-users] WRF-Var radiance workaround on SGI Altix

[Alex Conselvan de Oliveira]

Hello,

I'm compiling WRF-Var (V3.1.1) with the ifort compiler on a SGI Altix and
did have some problems. I found that the problem is related to the
endianness of the buffer library.

I added the line "call openbf(lnbufr, 'QUIET', 2)" to the file
"var/da/da_radiance/da_read_
obs_bufrtovs.inc" (before the line "call openbf(lnbufr,'IN',lnbufr)") and
did get the following output:

=============== WELCOME TO BUFR ARCHIVE LIBRARY ===============
MACHINE CHARACTERISTICS: NUMBER OF BYTES PER WORD = 4, NUMBER OF BITS PER
WORD = 32,
                         BYTE ORDER IS LITTLE ENDIAN (NREV= 1,
IORD=4321****),
                         ASCII  IS THE NATIVE LANGUAGE
============== VERSION: 2007-01-19 ==============


The bufr library (embedded in the WRF-Var code) was compiled to work with
little_endian files, but the parameter "-convert big_endian" on the
configure file forces the "amsua.bufr" file to be open converted to
"big_endian" causing the following error message when trying to read the
"amsua.bufr" file unblocked and re-blocked with the "cwordsh" program:

 **************BUFR ARCHIVE LIBRARY ABORT*****************
 BUFRLIB: OPENBF - ERROR READING INPUT FILE CONNECTED TO UNIT  26 WHEN
CHECKING
 FOR 'BUFR' IN FIRST 4 BYTES OF RECORD
 **************BUFR ARCHIVE LIBRARY ABORT*****************


I'm not sure if is safe to remove the '-convert big_endian' parameter from
the configure file, so I forced the 'amsua.bufr' file to be open converted
to 'little_endian' adding "convert = 'LITTLE_ENDIAN'" to the line 159 of the
file "var/da/da_radiance/da_read_obs_bufrtovs.inc":

open(unit=lnbufr,file=trim(infile),form='unformatted', &
      iostat = iost, status = 'old', convert = 'LITTLE_ENDIAN')

It seems to work...

Alex
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