Dataset {
  Grid {
    ARRAY:
      Float32 lwdown[time = 29216][lat = 1][lon = 15238];
    MAPS:
      Float64 time[time = 29216];
      Float64 lat[lat = 1];
      Float64 lon[lon = 15238];
  } lwdown;
  Float64 time[time = 29216];
  Float64 lat[lat = 1];
  Float64 lon[lon = 15238];
} gswp/vector/lwdown_era;