[gradsusr] PDEF problem, WRF

[Eric Altshuler]

Hello Song Feng,

>From the ncdump output, Struelat=30, Ntruelat=60, and slon=-97. These should be the same as the corresponding values you specified in your namelist.wps when you ran WPS.

Best regards,

Eric L. Altshuler
Assistant Research Scientist
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
USA

E-mail: ela at cola.iges.org
Phone: (301) 902-1257
Fax: (301) 595-9793

----- Original Message -----
From: "Song Feng" <sfeng2 at unlnotes.unl.edu>
To: gradsusr at gradsusr.org
Sent: Monday, December 6, 2010 4:37:43 PM
Subject: [gradsusr] PDEF problem, WRF


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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