Using traj.gs

[James T. Potemra]

You have to change the TDEF line to be either HR or MN.
Right now you have 1dy; make it 24HR.

Jim

Jason Snyder wrote:
>
>
> On Sun, Jan 24, 2010 at 4:16 PM, Jason Snyder <jmssnyder at ucdavis.edu 
> <mailto:jmssnyder at ucdavis.edu>> wrote:
>
>     I tried running traj.gs <http://traj.gs/> again after displaying a
>     map and I got the following message:
>      
>     ga-> d U;V
>     ga-> traj.gs <http://traj.gs/>
>     HR or MN missing in line TDEF of file uninan.ctl
>     ga->
>     Here is an example of a .ctl file I have for the zonal wind part
>     of my data:
>      
>     DSET uninan2.nc <http://uninan2.nc/>
>     OPTIONS template
>     DTYPE netcdf
>     XDEF longitude 57 linear 110.0 2.5
>     YDEF latitude 39 linear -5 2.5
>     TDEF time 1 linear 0z1Jun1974 1dy 0hr 0mn
>     How do I modify this file so I can succesfuuly run traj.gs
>     <http://traj.gs/>?
>      
>     Thanks,
>      
>     Jason
>     On Sun, Jan 24, 2010 at 2:59 PM, James T. Potemra <jimp at hawaii.edu
>     <mailto:jimp at hawaii.edu>> wrote:
>
>         Jason:
>
>         The script requires that you first display a variable (it uses
>         the GrADS query function to get plot dimensions).  If you
>         don't want to actually display something "under" your
>         trajectory, you can "set cmin" to something larger than U
>         and/or V, then display U and/or V, then run traj.gs
>         <http://traj.gs/>
>
>         Jim
>
>         Jason Snyder wrote:
>
>             I am trying to open up two files one with a zonal wind
>             componant and the other with the meridional wind componant
>             to use to make a trajectory via traj.gs <http://traj.gs/>
>             <http://traj.gs <http://traj.gs/>> script.
>
>              Here is the .ctl file for the zonal wind:
>              DSET uwndavg2001.nc <http://uwndavg2001.nc/>
>             <http://uwndavg2001.nc <http://uwndavg2001.nc/>>
>
>             OPTIONS template
>             DTYPE netcdf
>             XDEF longitude 144 linear 0.0 2.5
>             YDEF latitude 73 linear -90 2.5
>             TDEF time 1 linear 0z1Jan2001 1dy
>              Here is the .ctl file for the meridional wind:
>              DSET vwndavg2001.nc <http://vwndavg2001.nc/>
>             <http://vwndavg2001.nc <http://vwndavg2001.nc/>>
>
>             OPTIONS template
>             DTYPE netcdf
>             XDEF longitude 144 linear 0.0 2.5
>             YDEF latitude 73 linear -90 2.5
>             TDEF time 1 linear 0z1Jan2001 1dy
>              The variables for both are U and V respectively.  However
>             since the meridional file is open second the meridional
>             wind becomes defined as V.2.  Therefore, I have to
>             redefine V=V.2.  However when I run GrADS script traj.gs
>             <http://traj.gs/> <http://traj.gs <http://traj.gs/>> I get
>             the following message:
>
>               Please open file and draw a chart
>              How can I avoid this message and run traj.gs
>             <http://traj.gs/> <http://traj.gs <http://traj.gs/>>
>             successfully?
>              Thanks,
>              Jason
>
>
>