Re: Question again.

• To: Yan Gu <gu@xxxxxxxxxxxxx>
• Subject: Re: Question again.
• From: Robb Kambic <rkambic@xxxxxxxxxxxxxxxx>
• Date: Tue, 3 Jun 2003 11:17:13 -0600 (MDT)

On Tue, 3 Jun 2003, Yan Gu wrote:

Robb,

I have made a table and use it to convert. There is no problem to make the
cdl file. However, it gives me such error messages when I try to make nc
file:

Yan,

The problem is the udunits package doesn't recognize some of the units for
the parameters. I'll note the units to use below for the errors.

----------------------------------------------------------------------------

udunits(3): syntax error:
-

replace the "-" with ""  in the table

 ^
udunits(3): syntax error:
(0 - 1)

replace "(0 - 1)" with "bit" in the table

same for the others. If you have problems with the other variables you can
comment out the udunits attribute line with a "//" in the cdl file.

Robb...

     ^

udunits(3): syntax error:
(0 - 1)
     ^

udunits(3): syntax error:
-
 ^
Segmentation fault

-----------------------------------------------------------------------------

I have attached the tab file the the cdl file. I also attached the log
file which logged the convert infomation. Would you please help me on this
error?


Yan
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Yan Gu

Sr. Computer Program Analyst
Center For Ocean-Atmospheric Prediction Studies
Florida State University

Express Mail:   2035 E. Paul Dirac Drive
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


On Mon, 2 Jun 2003, Robb Kambic wrote:

> On Mon, 2 Jun 2003, Yan Gu wrote:
>
> > Robb,
> >
> > Thanks for your answer to me.
> >
> > For the gribtocdl, now I know that "3008" stands for 3008 parameters.
> > However, I am confused that if there are 3008 parameters, then why in the
> > result netCDF file, there are only about 47 parameters? Futher more, for
>
> Yan,
>
> No there are 47 parameters in the file, some of the parameters have have
> different levels, times, etc.  Each product only contains one parameter
> and level time information and there are multi levels for one parameter.
>
>
> > the table files, now I know the syntax of them. My new question is how to
> > contruct the table file. I mean, where I can get the infomation of grib ID
> > ( I guess I can get this in gribdump -h ), netCDF name, long name, units
> > and comments assume I only have grib files?
> >
>
> I looked up you parameters, they come from a ecmwf parameter table. It
> looks like these names are not the standard ones but are close. I'll attach 
the
> table, it's in XML format.
>
>
> Using your ctl file entries, ie
>
> no10Usfc  0 165,1,0  ** 10 metre u wind component m s**-1
>
> transforms into a table entry
>
> Grib;netCDF  ;long name                ;units   ;comments
> 165 ;no10Usfc;10 metre u wind component;m s**-1 ;
>
> You need to do this for all 47 variables. Then use the table for both
> programs gribtocdl and gribtonc. Then the names should be correct in the
> NetCDF file.
>
> The ctl file and parm_table_ecmwf_128.xml helped me decide the numbers.
>
> Robb...
>
>
> > For the gribtonc, I tried to attach the grib file i am using to
> > convert. I am too sad it is too big about 300 MB. I think I had better not
> > attach it. Well, I do attach the test.cdl file which from gribtocdl. I
> > also attach the Y63211.ctl file which I got from the site as the same time
> > as I downloaded the data.  Those parameters in that file are what we need
> > but for some reason I can't match them in the cdl file that created by
> > gribtonc. I guess the problem here is the name difference. But I do have
> > no idea how to match them. Would you please give me some clue?
> >
> > Again, I do appreciate your help. It really help me a lot.
> >
> > Yan

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