[RegCNET] Re: need a help(fvgcm-ctl file)
moetasim
moetasim at gcisc.org.pk
Sun Nov 13 23:55:25 CET 2005
I think I had given enough information to write down CTL file. Anyway, I just want to add in case you
have FvGCM window dataset. Check window size ( You already give this size while running terrain).
The resolution of FvGCM is 1.25 x 1 so using this, you can calculate number of grid points in x and y
direction and also dx and dy.
One inportant thing to remember is that data is not in sequential form but in direct access form.
Also, it is compressed which means you should add
UNPACK offset scale
in CTL file to let grads know that it has to unpack data for you. And just to remind you again, there
are four 3D variables in that file in following sequence:
U 0 18
V 0 18
T 0 18
Q 0 18
The sigme levels for FvGCM, I have already mentioned in very first email....check those. If you still
need help ( I don' think so...) to write down a CTL file for FvGCM then request Bi to write one for you.
Otherwise post yours when you have one ready!
Moet
On Sun, 13 Nov 2005 16:59:20 -0500, baris onol wrote
> hi,
> there is no CTL for files because these files are not written in
> Grads format.
>
> baris
>
> Siraj Ul Islam wrote:
>
> > I mean If we look in the data site
> > http://www.ictp.trieste.it/~regcm/model_and_data.htm
> > <http://www.ictp.trieste.it/%7Eregcm/model_and_data.htm>
> >
> > there is a one month sample data set of FVgcm with ctl file
> > (PS_A22071JAN
> > <http://www.ictp.trieste.it/%7Eregcm/FVGCM/SAsia_EAsia/PS_A22071JAN>
> > PS_A22071JAN.ctl
> > <http://www.ictp.trieste.it/%7Eregcm/FVGCM/SAsia_EAsia/PS_A22071JAN.ctl>).
> > But when we download the othe data file of fvgcm like FV_A22071JAN
> > <http://www.ictp.trieste.it/%7Eregcm/FVGCM/SAsia_EAsia/FV_A22071JAN> then
> > we donot have the ctl file so we cannot display it. and that is the
> > problem. We need a ctl file or any medhod to display this file.
> >
> >
> > Siraj
> >
> > On 11/13/05, *moetasim* <mashfaq at purdue.edu
> > <mailto:mashfaq at purdue.edu>> wrote:
> >
> > How is it? I mean if the problem is not in writing CTL file then
> > what is the
> > problem? I can't understand that what do you mean by CTL file
> > perfectly written
> > but still need to check for variables in datafile...Send your CTL
> > file to have a
> > look at its perfection.
> > Moet
> >
> >
> > Quoting Siraj Ul Islam <sirajkhan78 at gmail.com
> > <mailto:sirajkhan78 at gmail.com> >:
> >
> > > Well Moet the problem is not to write ctl file but the
> > variables. The
> > > variables stored in the data are needed to display . We donot
> > know what kind
> > > of variables are in that FVgcm data file. The ctl file is
> > perfectly written.
> > > Is there any way to check what kind of variables names are in
> > the data file,
> > > if we donot have the variables names.
> > > Siraj
> > >
> > > On 11/12/05, moetasim < mashfaq at purdue.edu
> > <mailto:mashfaq at purdue.edu>> wrote:
> > > >
> > > > Well, I think one should be able to write CTL file at his own
> > so use
> > > > following
> > > > info as hints:
> > > > grid points along lat= 181
> > > > grid points along lon= 288
> > > > vertical sigma levels= 18
> > > > The variables are written in the following sequence in the file:
> > > > U
> > > > V
> > > > T
> > > > Q
> > > > Calculate grid spacing from number of grid points along lat
> > and lon. Other
> > > > files contain PS and ZS (Geopotential at surface).
> > > > Data is on follwoing sigma levels (I think):
> > > > 0.3,0.5,0.7,.1,.15,.2,.25,.3,.35,.42,.5,.6,.7,.78,.85,.92,.96,1.
> > > >
> > > > You may better post your CTL file at RegCNET after you write one.
> > > > Good luck,
> > > >
> > > > Moet
> > > >
> > > >
> > > > Quoting "M.Adnan Abid" <madnanabid at gmail.com
> > <mailto:madnanabid at gmail.com>>:
> > > >
> > > > > >
> > > > > How are you ? i need a little bit help from you, i need a
> > fvgcm CTL
> > > > > file or i want the name of the variables used in the model..
> > > > > can you help me in this regard?
> > > > > At ICTP the CTL file for th PS is available but not for the
> > fvgcm.
> > > > >
> > > > > Cheers
> > > > > Adnan
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > >
> > > > _______________________________________________
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> > > >
> > >
> > >
> > >
> > > --
> > > Siraj Ul Islam
> > > 1: Research Fellow (Climate Section)
> > > Global Change Impact Studies Centre
> > > First Floor Saudi Pak tower
> > > Blue Area Islamabad Pakistan
> > > Ph : 92-51-9219785
> > > Fax : 92-51-9219787
> > >
> > > 2: Mphil Scholar
> > > Computational Physics and Simulation Group
> > > Department of Physics
> > > Quaid e Azam University
> > > Islamabad.
> > >
> >
> >
> > --
> >
> >
> >
> >
> > --
> > Siraj Ul Islam
> > 1: Research Fellow (Climate Section)
> > Global Change Impact Studies Centre
> > First Floor Saudi Pak tower
> > Blue Area Islamabad Pakistan
> > Ph : 92-51-9219785
> > Fax : 92-51-9219787
> >
> > 2: Mphil Scholar
> > Computational Physics and Simulation Group
> > Department of Physics
> > Quaid e Azam University
> > Islamabad.
> >
> >
> >
> >------------------------------------------------------------------------
> >
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> >
>
> --
> Baris ONOL
> North Carolina State University
> Department of Marine, Earth & Atmospheric Sciences
> Box 8208
> Raleigh, NC, USA 27695-8208
> Phone: (919) 513 0243
>
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