[gradsusr] error when opening a ctl file

[samo diatta]

Thanks Jennifer, It works fine !
thanks to Jayakrishnan for your suggestion.
S.

2015-09-04 12:20 GMT+00:00 Jennifer Adams <jma at cola.iges.org>:

> GrADS doesn’t like upper case letters in the variable names, so you need
> to create an alias. In your descriptor file, change “EP” to “EP=>ep” and it
> should work just fine. The time metadata in the file may be strange
> (because CDO is gagging on it), but you are providing everything GrADS
> needs with your descriptor’s TDEF entry, so GrADS isn't looking at any time
> metadata in the file.
> —Jennifer
>
>
> On Sep 3, 2015, at 1:09 PM, samo diatta <samo.diatta at univ-zig.sn> wrote:
>
> Hi everybody,
> I have a problem with interpreting my CTL file; I have a netcdf file
> with curious time format (or timestamp, see below when I use CDO) with
> ncdump I can view the time dimension; so I decide to use a ctl file to
> set the timestamp and open it with grads, unfortunately an error I
> can't understand occur when I open the ctl file (see below). Someone
> has an idea, how to solve the problem. Find attached the ctl file
>
> ga-> open file_ERAI.ctl
> Scanning description file:  file_ERAI.ctl
> Data file ERAI.EP.1979-2013.nc is open as file 1
> LON set to 0 360
> LAT set to -89.463 89.8339
> LEV set to 1000 1000
> Time values set: 1979:1:1:0 1979:1:1:0
> E set to 1 1
> ga-> q file
> File 1 :
>  Descriptor: file_ERAI.ctl
>  Binary: ERAI.EP.1979-2013.nc
>  Type = Gridded
>  Xsize = 512  Ysize = 256  Zsize = 1  Tsize = 420  Esize = 1
>  Number of Variables = 3
>     lon  0  y,x  longitude
>     lat  0  y,x  latitude
>     ep  0  t,y,x  Budget Evaporation minus Precipitation
> ga-> d ep
> Error: Variable ep not in netcdf file
> Data Request Error:  Error for variable 'ep'
>  Error ocurred at column 1
> DISPLAY error:  Invalid expression
>  Expression = ep
> .................. ncdump gives :
> ncdump -h ERAI.EP.1979-2013.nc
> netcdf ERAI.EP.1979-2013 {
> dimensions:
> time = 420 ;
> lat = 256 ;
> lon = 512 ;
> variables:
> float EP(time, lat, lon) ;
> EP:units = "kg/m2/s" ;
> EP:long_name = "Budget Evaporation minus Precipitation" ;
> EP:_FillValue = 1.e+20f ;
> double time(time) ;
> time:calendar = "standard" ;
> float lat(lat) ;
> lat:La1 = 89.463f ;
> lat:Lo1 = 0.f ;
> lat:La2 = -89.463f ;
> lat:Lo2 = 359.297f ;
> lat:Di = 0.7031252f ;
> lat:N = 128.f ;
> lat:units = "degrees_north" ;
> lat:GridType = "Gaussian Latitude/Longitude Grid (Quasi-Regular)" ;
> lat:long_name = "latitude" ;
> float lon(lon) ;
> lon:La1 = 89.463f ;
> lon:Lo1 = 0.f ;
> lon:La2 = -89.463f ;
> lon:Lo2 = 359.297f ;
> lon:Di = 0.7031252f ;
> lon:N = 128.f ;
> lon:units = "degrees_east" ;
> lon:GridType = "Gaussian Latitude/Longitude Grid (Quasi-Regular)" ;
> lon:long_name = "longitude" ;
> }
> ............. and
> CDO showdate ERAI.EP.1979-2013.nc
> arning (splitTimevalue) : Reset wrong date/time to 0019-01-01 00:00:00!
>  0019-01-01  0019-01-02  0019-01-03  0019-01-04  0019-01-05
> 0019-01-06  0019-01-07  0019-01-08  0019-01-09  0019-01-10  0019-01-11
> 0019-01-12  0019-01-01  0019-01-02  0019-01-03  0019-01-04
> 0019-01-05  0019-01-06  0019-01-07  0019-01-08  0019-01-09  0019-01-10
> .......................................................
> <file_ERAI.ctl>_______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> --
> Jennifer M. Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> 111 Research Hall, Mail Stop 2B3
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030
>
>
>
>
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20150904/b2b20a74/attachment.html