Re: [Fwd: Re: 20041020: no record dimension data written to netCDF file]

On Wed, 27 Oct 2004, Lori Thompson wrote:

> Robb-
>
> I just wanted to pass along to you the solution to the problem I had
> that was presented by Remik. Thanks for all your help.

thanks for the response. So it appears that your cdl wasn't 100% correct

robb...
>
> Lori
>
> Remik Ziemlinski wrote:
> > gribtocdl in.grib > in.cdl
> > gribtonc in.cdl out.nc < in.grib
> > ncrename -d record,reftime out.nc
> >
> > Voila...and please update Robb.
> >
> >
>
> >>  > Robb-
> >>  >
> >>  > The record dimension (time) has 124 values, where each value is a
> >> number
> >>  > representing "n" days since a particular date (i.e., 105192,
> >> 105198). In
> >>  > this case, the resultant netCDF file does not contain this data in the
> >>  > data section. As a result, the time values are 1 through 124.
> >>  >
> >>  > Valtime and reftime have these correct values, but the data variables
> >>  > are a function of the record dimension and not these variables. I
> >> tried
> >>  > manually editing the CDL file and adding the record data in the data
> >>  > section but this did not work. You can get the GRIB data and the ASCII
> >>  > file containing the time variables via anonymous ftp:
> >>  >       ftp ftp.gfdl.noaa.gov
> >>  > The tar gzipped file is:
> >>  >       /pub/lat/pgb.200401.tar.gz
> >>  >
> >>  > Thank you,
> >>  > Lori
> >>  >
> >>  > Robb Kambic wrote:
> >>  > > On Wed, 20 Oct 2004, Unidata Support wrote:
> >>  > >
> >>  > >
> >>  > >>------- Forwarded Message
> >>  > >>
> >>  > >>
> >>  > >>>To: address@hidden
> >>  > >>>From: "Lori Thompson" <address@hidden>
> >>  > >>>Subject: no record dimension data written to netCDF file
> >>  > >>>Organization: NOAA
> >>  > >>>Keywords: 200410201509.i9KF9IUE015245 gribtonc
> >>  > >>
> >>  > >>I used gribtocdl and gribtonc to convert NCEP reanalysis2 GRIB
> >> data to
> >>  > >>netCDF. The resulting netCDF file contains the correct time
> >> levels (124)
> >>  > >>represented as RECORD dimension and all the variables are a function
> >>  > >>of this dimension. However, there is no data for RECORD in the data
> >>  > >>section. The data section contains values for reftime, valtime,
> >>  > >>datetime, valtime_offset and forecasttime. As a result, plots of the
> >>  > >>data show it as a function of 124 records, instead of the correct
> >> values
> >>  > >>as a representation of "hours since 1992-01-01..." The correct
> >> values
> >>  > >>are represented in the data section under reftime and valtime and
> >> the
> >>  > >>strings are correct for datetime and forecasttime. Is the correct
> >>  > >>solution to manipulate the CDL file and make the variables a
> >> funtion of
> >>  > >>valtime instead of record?
> >>  > >
> >>  > >
> >>  > > Lori,
> >>  > >
> >>  > > no quite sure i understand fully what you  are saying, but if
> >> valtime
> >>  > > works...     could you send me your cdl file and the resulting
> >> netcdf file
> >>  > > with the data section, actually you could just send a ascii
> >> representation
> >>  > > of the vars reftime, valtime, datetime, valtime_offset and
> >> forecasttime.
> >>  > > also do you have a sample grib file i can get?
> >>  > >
> >>  > > robb..,
> >>  > >
> >>  > >
> >>  > >>Thanks in advance,
> >>  > >>Lori
> >>  > >>
> >>  > >>--
> >>  >
> >>  
> >> >>****************************************************************************
> >>  > >>Unidata User Support                                    UCAR
> >>  > >>(303)497-8643
> >>  > >>address@hidden
> >>  >
> >>  
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> >>  > >>------- End of Forwarded Message
> >>  > >>
> >>  > >
> >>  > >
> >>  > >
> >> ===============================================================================
> >>
> >>  > > Robb Kambic                       Unidata Program Center
> >>  > > Software Engineer III               Univ. Corp for Atmospheric
> >> Research
> >>  > > address@hidden           WWW: http://www.unidata.ucar.edu/
> >>  > >
> >> ===============================================================================
> >>
> >>  >
> >>  >
> >>
> >> ===============================================================================
> >>
> >> Robb Kambic                       Unidata Program Center
> >> Software Engineer III               Univ. Corp for Atmospheric Research
> >> address@hidden           WWW: http://www.unidata.ucar.edu/
> >> ===============================================================================
> >>
> >>
> >
> >
>
>

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================