Re: 20040317: avn to gfs cdl files

On Fri, 19 Mar 2004, Ruth Platner wrote:

> Hi Rob,
>
> Thanks for the cdl file.
>
> I'm not sure I know how to create 1.25 raw data from the ldm feed, and
> the ldm is the source of my data.
>
> For the older decoders I had an entry like this in my pqact file:
>
> HRS  ^H[UVHRP][I-P]... KWB. (..)(..).*(/mAVN|/mSSIAVN)
>      PIPE    /usr/local/ldm/decoders/bin/gribtonc
>      -q "lin,dlat=1.25,dlon=1.25" decoders/etc/avn-1.25x1.25.cdl
>      data/GRIB/(\1:yyyy)(\1:mm)\1\2_avn-1.25x1.25.nc

Ruth,

Create raw file using FILE action in the pqact.conf with following entry:

HRS     ^H[UVHRP][I-P]... KWB. (..)(..).*(/mAVN|/mSSIAVN)
        FILE    data/GRIB/(\1:yyyy)(\1:mm)\1\2_gfs_37-44.wmo

Here's how to create the 1.25 cdl

% gribtocdl -v  -q "lin,dlat=1.25,dlon=1.25" < "raw file from above" >
gfs-1.25x1.25_37-44.cdl

You will still have to edit the cdl to make it 100% correct.

Robb...




>
> I thought gribtonc was doing some interpolating because the -q
> "lin,dlat=1.25,dlon=1.25" was an option to gribtonc. I think if i just
> save everything that I get from HRS  ^H[UVHRP][I-P]... KWB.
> (..)(..).*(/mAVN|/mSSIAVN) into a file for a date, that it won't really
> be 1.25 data. I'm not sure at all, but since I could get 2.5, 1.25 and 1
> degree resolution from the same grib data, I thought it was gribtonc that
> was doing the interpolating.
>
> I could try saving all the grib data as above into a file and see what
> gribtocdl does with it, but how it would create a 1.25 data file I don't
> know. I have used gribtocdl before for existing grib files, but I'm a
> little confused about how this would work.
>
> Thanks some more,
>
> Ruth
>
>
> Robb Kambic wrote:
>       On Wed, 17 Mar 2004, Unidata Support wrote:
>
>       >
>       > ------- Forwarded Message
>       >
>       > >To: address@hidden
>       > >From: Ruth Platner <address@hidden>
>       > >Subject: avn to gfs cdl files
>       > >Organization: UCAR/Unidata
>       > >Keywords: 200403172118.i2HLI4rV029423
>       >
>       > Hi,
>       >
>       > The new  decoders, decoders-3.0.2, came with new cdl files.
>       The file
>       > avn-x.cdl was replaced with gfs_37-44.cdl. I'm wondering if
>       there are
>       > similar ready to go replacements for avn-1.0x1.0.cdl and
>
>       Hiya,
>
>       I attached gfs-1.0x1.0_3.cdl for the 1 degree grid, it might
>       needs some
>       minor modifications to make it 100% correct.  I don't have
>       any
>       1.25 raw data to make that one. You can make the cdls
>       yourself with the
>       gribtocdl program. When making the 1 degree, I found some
>       bugs in the
>       gribtocdl program so I need to make a new release. It was
>       missing some
>       level info in the program.  So release decoders-3.0.3 should
>       be able to
>       create the 1.25 one. Will let you know when I completed the
>       release.
>
>       Robb...
>
>       > avn-1.25x1.25.cdl.
>       >
>       > Thanks for your help,
>       >
>       > Ruth
>       >
>       > --
>       >
>       
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>       
> ===============================================================================
>       Robb Kambic                                Unidata Program
>       Center
>       Software Engineer III                      Univ. Corp for
>       Atmospheric Research
>       address@hidden                   WWW:
>       http://www.unidata.ucar.edu/
>       
> ===============================================================================
>
>
>       ------------------------------------------------------------------------
>                                  Name: gfs-1.0x1.0_3.cdl
>          gfs-1.0x1.0_3.cdl       Type: Plain Text (TEXT/PLAIN)
>                              Encoding: BASE64
>                           Description: gfs-1.0x1.0_3.cdl
>
>
>

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