[gradsusr] PDEF problem, WRF

[Matei Georgescu]

I've always used ARWPost to do this (creates Grads-readable file and
associated control file) ...

Please check here:
http://www.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap9.htm#_ARWpost_2

hope this helps,
matei


On Mon, Dec 6, 2010 at 2:37 PM, Song Feng <sfeng2 at unlnotes.unl.edu> wrote:

> Hi All:
>
> I'd like to display the WRF output (in NetCDF format) using GrADS. The
> projection used is Lambert Conformal. I am trying to create a 'CTL' file for
> the output. The following are the PDEF options for the CTL file:
>
> *PDEF isize jsize LCC latref lonref iref jref Struelat Ntruelat slon** dx
> dy*
>
> I can find the information for isize, jsize, latref, lonref, iref, jref, dx
> and dy. *The problem is how can I find the information for "Struelat
> Ntruelat slon"?* I am bugging this for a while. Can anybody give me some
> clues on how to solve this problems?
>
>
> The following are the WRF ncdump output:
>
> dimensions:
>         time = UNLIMITED ; // (1095 currently)
>         yc = 109 ;
>         xc = 134 ;
>         bnds = 2 ;
> variables:
>         char Lambert_Conformal ;
>                 Lambert_Conformal:grid_mapping_name =
> "lambert_conformal_conic" ;
>                 Lambert_Conformal:standard_parallel = 30., 60. ;
>                 Lambert_Conformal:longitude_of_central_meridian = -97. ;
>                 Lambert_Conformal:latitude_of_projection_origin = 47.5 ;
>                 Lambert_Conformal:false_easting = 3325000. ;
>                 Lambert_Conformal:false_northing = 2700000. ;
>         double yc(yc) ;
>                 yc:long_name = "y-coordinate in Cartesian system" ;
>                 yc:standard_name = "projection_y_coordinate" ;
>                 yc:axis = "Y" ;
>                 yc:units = "m" ;
>         double xc(xc) ;
>                 xc:long_name = "x-coordinate in Cartesian system" ;
>                 xc:standard_name = "projection_x_coordinate" ;
>                 xc:axis = "X" ;
>                 xc:units = "m" ;
>         double lon(yc, xc) ;
>                 lon:long_name = "longitude" ;
>                 lon:standard_name = "longitude" ;
>                 lon:units = "degrees_east" ;
>                 lon:axis = "X" ;
>         double lat(yc, xc) ;
>                 lat:long_name = "latitude" ;
>                 lat:standard_name = "latitude" ;
>                 lat:units = "degrees_north" ;
>                 lat:axis = "Y" ;
>         double time(time) ;
>                 time:long_name = "time" ;
>                 time:standard_name = "time" ;
>                 time:units = "days since 1968-01-01 00:00:0.0" ;
>                 time:axis = "T" ;
>                 time:calendar = "365_day" ;
>                 time:bounds = "time_bnds" ;
>         double time_bnds(time, bnds) ;
>         float tasmax(time, yc, xc) ;
>                 tasmax:long_name = "Maximum Daily Surface Air Temperature"
> ;
>                 tasmax:standard_name = "air_temperature" ;
>                 tasmax:units = "K" ;
>                 tasmax:_FillValue = 1.e+20f ;
>                 tasmax:missing_value = 1.e+20f ;
>                 tasmax:coordinates = "lon lat level" ;
>                 tasmax:grid_mapping = "Lambert_Conformal" ;
>                 tasmax:cell_methods = "time: maximum (interval: 24 hours)"
> ;
>                 tasmax:original_name = "T2" ;
>                 tasmax:original_units = "K" ;
>                 tasmax:level_desc = "2 m" ;
>         double level ;
>                 level:standard_name = "height" ;
>                 level:units = "m" ;
>                 level:positive = "up" ;
>                 level:axis = "Z" ;
>
> // global attributes:
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>
*======================================
Matei Georgescu, Ph.D.*
*School of Mathematical and Statistical Sciences and
Center for Environmental Fluid Dynamics*
*Arizona State University*
*Phone*: (480) 965-3770
*Fax*: (480) 965-8119
*E-mail*: Matei.Georgescu at asu.edu
*==================================**====*
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