[gradsusr] help in opening file

[Ashok Priyadarshan Dimri]

Hi,
Could anyone guide me through to use tke.mon.mean.nc file.
sdfopen tke.mon.mean.nc
give
Scanning self-describing file:  tke.mon.mean.nc
gadsdf: SDF file has no discernable X coordinate.
To open this file with GrADS, use a descriptor file with an XDEF entry.
Documentation is at http://iges.org/grads/gadoc/SDFdescriptorfile.html


While looking into it (ncdump tke.mon.mean.nc)
it is 
netcdf tke.mon.mean {
dimensions:
    y = 277 ;
    x = 349 ;
    level = 15 ;
    time = UNLIMITED ; // (384 currently)
    nbnds = 2 ;
variables:
    int Lambert_Conformal ;
        Lambert_Conformal:grid_mapping_name = "lambert_conformal_conic" ;
        Lambert_Conformal:standard_parallel = 50., 50. ;
        Lambert_Conformal:longitude_of_central_meridian = -107. ;
        Lambert_Conformal:latitude_of_projection_origin = 50. ;
        Lambert_Conformal:false_easting = 5632642.22547 ;
        Lambert_Conformal:false_northing = 4612545.65137 ;
    float lat(y, x) ;
        lat:long_name = "latitude coordinate" ;
        lat:units = "degrees_north" ;
        lat:standard_name = "latitude" ;
        lat:axis = "Y" ;
        lat:coordinate_defines = "point" ;
    float level(level) ;
        level:units = "millibar" ;
        level:actual_range = 1000.f, 600.f ;
        level:long_name = "Level" ;
        level:positive = "down" ;
        level:GRIB_id = 100s ;
        level:GRIB_name = "hPa" ;
        level:axis = "Z" ;
        level:coordinate_defines = "point" ;
    float lon(y, x) ;
        lon:units = "degrees_east" ;
        lon:long_name = "longitude coordinate" ;
        lon:standard_name = "longitude" ;
        lon:axis = "X" ;
        lon:coordinate_defines = "point" ;
    double time(time) ;
        time:units = "hours since 1800-1-1 00:00:0.0" ;
        time:long_name = "Time" ;
        time:actual_range = 1569072., 1848840. ;
        time:delta_t = "0000-01-00 00:00:00" ;
        time:avg_period = "0000-01-00 00:00:00" ;
        time:prev_avg_period = "0000-00-01 00:00:00" ;
        time:standard_name = "time" ;
        time:axis = "T" ;
        time:coordinate_defines = "start" ;
    double time_bnds(time, nbnds) ;
        time_bnds:long_name = "Time Boundaries" ;
    short tke(time, level, y, x) ;
        tke:long_name = "Monthly Turbulent Kinetic Energy on Pressure Levels" ;
        tke:valid_range = -32765s, -22766s ;
        tke:unpacked_valid_range = 0.f, 105.f ;
        tke:actual_range = 0.f, 16.48f ;
        tke:units = "J/kg" ;
        tke:add_offset = 327.66f ;
        tke:scale_factor = 0.01f ;
        tke:missing_value = 32766s ;
        tke:_FillValue = -32767s ;
        tke:precision = 2s ;
        tke:least_significant_digit = 2s ;
        tke:GRIB_id = 158s ;
        tke:GRIB_name = "TKE" ;
        tke:var_desc = "Turbulent Kinetic Energy" ;
        tke:dataset = "NARR Monthly Averages" ;
        tke:level_desc = "Pressure Levels" ;
        tke:statistic = "Mean" ;
        tke:parent_stat = "Individual Obs" ;
        tke:cell_methods = "time: mean (monthly from 3-hourly values)" ;
        tke:grid_mapping = "Lambert_Conformal" ;
        tke:coordinates = "lat lon" ;
    float x(x) ;
        x:long_name = "eastward distance from southwest corner of domain in projection coordinates" ;
        x:units = "m" ;
        x:standard_name = "projection_x_coordinate" ;
    float y(y) ;
        y:long_name = "northward distance from southwest corner of domain in projection coordinates" ;
        y:units = "m" ;
        y:standard_name = "projection_y_coordinate" ;

// global attributes:
        :Conventions = "CF-1.0" ;
        :title = "Monthly NARR" ;
        :history = "created 2005/07 by Hoop (netCDF2.3)" ;
        :comments = "Data is from North American Regional Reanalysis\n",
            "(8x/day).  It consists of most variables interpolated to\n",
            "pressure surfaces from model (sigma) surfaces." ;
        :institution = "National Centers for Environmental Prediction" ;
        :platform = "Model" ;
        :references = "http://wwwt.emc.ncep.noaa.gov/mmb/rreanl/index.html\n",
            "http://www.esrl.noaa.gov/psd/data/gridded/data.narr.html" ;
        :NCO = "4.0.0" ;


Sorry for long massage
Dimri
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