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Re: 20041220: netCDF Decoders - Decoding/Tiling ETA218 (12km) with gribtonc

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  • Subject: Re: 20041220: netCDF Decoders - Decoding/Tiling ETA218 (12km) with gribtonc
  • Date: Tue, 21 Dec 2004 14:05:08 -0700 (MST)
francois,

with the test file, i discovered that level 245 was missing. it was
recently added. a new decoders release was made decoders-3.0.7.tar.Z.
it's available in the ftp directory.

after building the release, run gribtocdl again to create a new cdl, then
run gribtonc. i don't know if this will solve your problem but it's a step
in the right direction.

robb...





On Tue, 21 Dec 2004, Francois Vandenberghe wrote:

>
> Setting back to 255 brings the previous problem of the La1 error message:
>
> Dec 21 19:22:53 gribtonc.exe[9804]: 379, eta.t00z.awip21806.nc nav.
> mismatch La1: 33.011 != 19.9433
>
> as I specify the south west corner at 19.9433N while the tile I am reading
> begins at 33.011N
>
> I have attached the tile file (it's binary but not very big) in case your
> connection would allow this transfer.
>
> Thanks again,
>
> Francois
>
>
> On Tue, 21 Dec 2004, Robb Kambic wrote:
>
> > On Tue, 21 Dec 2004, Francois Vandenberghe wrote:
> >
> > >
> > > Robb,
> > >
> > > Thank for the quick response. I have made the modifications you suggested,
> > > ie setting La1/Lo1 to the south west corner of the full ETA218 grid
> > > and setting the grid_number to the list of all the tiles (there are 54,
> > > see map at http://www.emc.ncep.noaa.gov/mmb/research/tiles.218.html).
> > > I ran into a new problem: it seems that the GRIB file carries the "255"
> > > code for all the tiles and I got the following error messages:
> > >
> > > Dec 21 15:54:04 gribtonc.exe[28513]: 374 grid 255 not in grid_number list
> > > in eta.t00z.awip21806.nc
> > francois,
> >
> > sometimes in stitched together  grid files the grid numbers are not used,
> > only 255 is used.  so replace with grid_number = 255;
> > >
> > > I have attached my CDL file for your information and put two tiled
> > > files (tile 23 and tile 32) at:
> > > ftp://ftp.rap.ucar.edu:incoming/irap/vandenb/eta.t00z.awip21806.23
> > > ftp://ftp.rap.ucar.edu:incoming/irap/vandenb/eta.t00z.awip21806.32
> >
> > i get connection timed out errors on retrieval or chdir errors
> >
> > GET ftp://ftp.rap.ucar.edu:incoming/irap/vandenb/eta.t00z.awip21806.23 >
> > eta.t00z.awip21806.23
> > <HTML>
> > <HEAD><TITLE>An Error Occurred</TITLE></HEAD>
> > <BODY>
> > <H1>An Error Occurred</h1>
> > 404 Can't chdir to irap
> > </BODY>
> > </HTML>
> >
> > >
> > > Other files can be found under the naming eta.tAAz.awip218FF.TT
> > > (where AA is the analysis time, FF the forecast lead time and
> > > TT the tile number) at:
> > > ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/eta/prod/eta.20041221/
> >
> > i get:
> >
> > Can't build data connection: Connection timed out
> >
> >
> > i'm working at home and my connection doesn't permit tranfering of large
> > data files. if the above solution doesn't work, i look at it tomorrow.
> >
> > robb...
> > >
> > > Thanks for the support,
> > >
> > > Francois
> > >
> > >
> > >
> > > On Tue, 21 Dec 2004, Robb Kambic wrote:
> > >
> > > > On Mon, 20 Dec 2004, Unidata Support wrote:
> > > >
> > > > >
> > > > > ------- Forwarded Message
> > > > >
> > > > > >To: address@hidden
> > > > > >From: "Vandenberghe" <address@hidden>
> > > > > >Subject: netCDF Decoders - Decoding/Tiling ETA218 (12km) with 
> > > > > >gribtonc
> > > > > >Organization: ?
> > > > > >Keywords: 200412201842.iBKIgRcV018844 netCDF decoders gribtonc
> > > > >
> > > > > --=_76dbc2476f6428fae144519a869f88c1
> > > > > Content-Type: text/plain; charset="ISO-8859-1"
> > > > > Content-Transfer-Encoding: 7bit
> > > > >
> > > > > Institution:  NCAR
> > > > > Package Version: gribtonc
> > > > > Operating System: LINUX
> > > > > Hardware Information: Intel Pentium
> > > > > Inquiry: Hi,
> > > > >
> > > > > I am trying to use gribtonc to convert and tile the ETA 218 tiled
> > > > > products available from:
> > > > >
> > > > > ftpprd.ncep.noaa.gov:/pub/data/nccf/com/eta/prod/
> > > >
> > > > Francois,
> > > >
> > > > i went to the site, there were no files available.
> > > > >
> > > > > I have attached my CDL file. The program works fine with one tile, but
> > > > > when I try to use it with several tiles, then I got the following 
> > > > > error
> > > > > message:
> > > > >
> > > > > Dec 20 18:29:49 gribtonc.exe[29974]: 1, eta.t00z.awip21806.nc nav.
> > > > > mismatch La1: 33.011 != 19.9433
> > > > >
> > > > I didn't receive the cdl but here' a few comments. the La1 and Lo1 
> > > > should
> > > > be the south west corner of the full ETA218 domain, sound like you coded
> > > > ti correctly. the grib_number should be all the grid tiles, for ecmwf it
> > > > is: grid_number = 1,2,3,4,5,6,7,8,9,10,11,12 ;
> > > >
> > > > > Here 33.011 is the latitude of the south west corner of the tile, 
> > > > > while
> > > > > 19.9433 is the south west corner of the full ETA218 domain. One tile
> > > > > having the dimensions 69x72 while the full domain have the dimensions
> > > > > 491x303.
> > > > >
> > > > > I was able to tile other products such as ECMWF tiled data which were
> > > > > not on a projection map. So I was wondering if the projection is the
> > > > > problem.
> > > >
> > > > all files should have the same projection
> > > >
> > > > robb...
> > > >
> > > >
> > > > >
> > > > > Thanks in advance for any help,
> > > > >
> > > > > Francois
> > > > >
> > > > >
> > > > > --=_76dbc2476f6428fae144519a869f88c1
> > > > > Content-Type: application/octet-stream
> > > > > Content-Transfer-Encoding: base64
> > > > > Content-Disposition: attachment; filename="eta218_tiled.cdl"
> > > > >
> > > > >
> > > > > --=_76dbc2476f6428fae144519a869f88c1--
> > > > >
> > > > > --
> > > > > NOTE: All email exchanges with Unidata User Support are recorded in 
> > > > > the
> > > > > Unidata inquiry tracking system and then made publicly available
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> > > > > us.
> > > > >
> > > > > ------- 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/
===============================================================================