[gradsusr] how can i read GRIB2 files by FORTRAN script (or any lang.) for example read fields from " gfs.t00z.pgrb2full.0p50.f012 "

Wed Mar 2 03:05:37 EST 2016

Hey guys, is there any way to
read GRIB2 Fields by name "gfs.t00z.pgrb2full.0p50.f012
<ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2016030200/gfs.t00z.pgrb2full.0p50.f012>
"

 in ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/

for example TMP
<ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2016030200/gfs.t00z.pgrb2full.0p50.f012>
, RH , UGRD , VGRD , HGT in any level for example 1000mb and 500mb
in each lat , lon and heights ?
i want to detemine  1-lat , 2-lon  , 3-level , [Parameter such as temp]
only by script in Fortran or C or any programming language (not in GrADS or
other Plotter)

Thanks in advance

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