Grads 2.0 with grib2 files

[Oliver König]

Hello Wesley (and grads users),
I download all the grib2 files from
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.YYYYMMDDRR/gfs.trrz.sfluxgrbfHH.grib2
and I automaticallly extract values for certain lat/lon combinations with
wgrib2/grads and write them into a database. Since I switched from grib1 ->
wgrib/grads1.9 to grib2 -> wgrib2/grads2 last week only every second forecast
time step is stored on the database. Before the change to grib2/grads2 all
the 3 hourly forecast timesteps were generated and stored in the DB.

I do "set t 2" in the grads script that generates the forecast values.

Is this a wgrib2 problem?

Regards,
Oliver


On Thursday 07 February 2008 16:30:50 Wesley Ebisuzaki wrote:
> Oliver,
>
> If you examine the ctl file closely, you'll see that there are two time
> steps.
> If you do "set t 2", then all the fields will appear.  This is a temporary
> fix until wgrib2 can be made consistent with gribmap.  (For temporally
> averaged quantities, wgrib2 returns the time when the period started
> and gribmap uses the time when the period ended.)
>
>     Wesley Ebisuzaki
>
> Oliver König wrote:
> > Hello,
> > I installed Grads 2.0 binaries on Debian/GNU Linux testing (64 bit)
> > because I want to work with grib2  data from NCEP.
> >
> > Installation of grads 2.0 binaries
> > ----------------------------------
> > $ wget ftp://iges.org/grads/2.0/grads-bin-2.0.a0-RHEL5-x86_64.tar.gz
> > $ tar xvfz grads-bin-2.0.a0-RHEL5-x86_64.tar.gz
> > $ cp grads-2.0.a0/bin/* /usr/bin
> >
> > Installation of grads data files
> > --------------------------------
> > $ cd /usr/local/lib/
> > $ mkdir grads
> > $ cd grads
> > $ wget ftp://iges.org/grads/data.tar.Z
> > $ tar xvfz data.tar.Z
> >
> > Test grib2 data in grads
> > ---------------------------
> > $ wget ftp://ncep.domain.tld/gfs_grib2.file
> > $ g2ctl.pl -verf gfs_grib2.file > gfs_grib2.ctl
> > $ gribmap -i gfs_grib2.ctl
> >
> > $ grads
> > ga-> open gfs2_grib2.ctl
> > ga-> q file
> > ga-> d tmpsfc
> > Cannot contour grid - all undefined values
> >
> > The grib2.file is from an operational NOAA/NCEP server so I guess the
> > file and the format are okay. I managed to display grib1 data in Grads
> > 2.0. does anyone have an idea what the problem is? Help is welcome.
> > thanks!
> >
> > Regards,
> > --
> > Oliver König