netcdf files/g/d094001/2017/wnd0-30mb.cdas1.201705.grb2 {
  dimensions:
    lon = 720;
    lat = 361;
    time = 744;
    pressure_difference_layer = 1;
  variables:
    int LatLon_Projection;
      :grid_mapping_name = "latitude_longitude";
      :earth_radius = 6371229.0; // double

    float lat(lat=361);
      :units = "degrees_north";

    float lon(lon=720);
      :units = "degrees_east";

    double time(time=744);
      :units = "Hour since 2017-05-01T00:00:00Z";
      :standard_name = "time";
      :long_name = "GRIB forecast or observation time";
      :calendar = "proleptic_gregorian";

    double reftime(time=744);
      :standard_name = "forecast_reference_time";
      :long_name = "GRIB reference time";
      :calendar = "proleptic_gregorian";
      :units = "Hour since 2017-05-01T00:00:00Z";

    float pressure_difference_layer(pressure_difference_layer=1);
      :units = "Pa";
      :long_name = "Level at specified pressure difference from ground to level";
      :positive = "up";
      :Grib_level_type = 108; // int
      :datum = "ground";
      :bounds = "pressure_difference_layer_bounds";

    float pressure_difference_layer_bounds(pressure_difference_layer=1, 2);
      :units = "Pa";
      :long_name = "bounds for pressure_difference_layer";

    float u-component_of_wind_pressure_difference_layer(time=744, pressure_difference_layer=1, lat=361, lon=720);
      :long_name = "u-component of wind @ Level at specified pressure difference from ground to level layer";
      :units = "m/s";
      :abbreviation = "UGRD";
      :missing_value = NaNf; // float
      :grid_mapping = "LatLon_Projection";
      :coordinates = "reftime time pressure_difference_layer lat lon ";
      :Grib_Variable_Id = "VAR_0-2-2_L108_layer";
      :Grib2_Parameter = 0, 2, 2; // int
      :Grib2_Parameter_Discipline = "Meteorological products";
      :Grib2_Parameter_Category = "Momentum";
      :Grib2_Parameter_Name = "u-component of wind";
      :Grib2_Level_Type = 108; // int
      :Grib2_Level_Desc = "Level at specified pressure difference from ground to level";
      :Grib2_Generating_Process_Type = "Forecast";
      :Grib2_Statistical_Process_Type = "UnknownStatType--1";

    float v-component_of_wind_pressure_difference_layer(time=744, pressure_difference_layer=1, lat=361, lon=720);
      :long_name = "v-component of wind @ Level at specified pressure difference from ground to level layer";
      :units = "m/s";
      :abbreviation = "VGRD";
      :missing_value = NaNf; // float
      :grid_mapping = "LatLon_Projection";
      :coordinates = "reftime time pressure_difference_layer lat lon ";
      :Grib_Variable_Id = "VAR_0-2-3_L108_layer";
      :Grib2_Parameter = 0, 2, 3; // int
      :Grib2_Parameter_Discipline = "Meteorological products";
      :Grib2_Parameter_Category = "Momentum";
      :Grib2_Parameter_Name = "v-component of wind";
      :Grib2_Level_Type = 108; // int
      :Grib2_Level_Desc = "Level at specified pressure difference from ground to level";
      :Grib2_Generating_Process_Type = "Forecast";
      :Grib2_Statistical_Process_Type = "UnknownStatType--1";

  // global attributes:
  :Originating_or_generating_Center = "US National Weather Service, National Centres for Environmental Prediction (NCEP)";
  :Originating_or_generating_Subcenter = "0";
  :GRIB_table_version = "2,1";
  :Type_of_generating_process = "Forecast";
  :Analysis_or_forecast_generating_process_identifier_defined_by_originating_centre = "Climate Data Assimilation System (CDAS)";
  :file_format = "GRIB-2";
  :Conventions = "CF-1.6";
  :history = "Read using CDM IOSP GribCollection v3";
  :featureType = "GRID";
}