Dataset {
  Grid {
    ARRAY:
      Float32 o3[ens = 24][time = 480][lev = 72][lat = 361][lon = 576];
    MAPS:
      Float64 ens[ens = 24];
      Float64 time[time = 480];
      Float64 lev[lev = 72];
      Float64 lat[lat = 361];
      Float64 lon[lon = 576];
  } o3;
  Grid {
    ARRAY:
      Float32 ps[ens = 24][time = 480][lat = 361][lon = 576];
    MAPS:
      Float64 ens[ens = 24];
      Float64 time[time = 480];
      Float64 lat[lat = 361];
      Float64 lon[lon = 576];
  } ps;
  Float64 ens[ens = 24];
  Float64 time[time = 480];
  Float64 lev[lev = 72];
  Float64 lat[lat = 361];
  Float64 lon[lon = 576];
} /merra2_gmi/instU_3d_ozo_Nv;