Dataset {
  Grid {
    ARRAY:
      Float32 lwdown[ens = 1][time = 39456][lat = 150][lon = 360];
    MAPS:
      Float64 ens[ens = 1];
      Float64 time[time = 39456];
      Float64 lat[lat = 150];
      Float64 lon[lon = 360];
  } lwdown;
  Float64 ens[ens = 1];
  Float64 time[time = 39456];
  Float64 lat[lat = 150];
  Float64 lon[lon = 360];
} gswp/grid/lwdown_ncep;