Dataset {
  Grid {
    ARRAY:
      Float32 tau_550[time = 10000][lat = 721][lon = 1152];
    MAPS:
      Float64 time[time = 10000];
      Float64 lat[lat = 721];
      Float64 lon[lon = 1152];
  } tau_550;
  Float64 time[time = 10000];
  Float64 lat[lat = 721];
  Float64 lon[lon = 1152];
} AeroObs/monthly/aeronet.ctl;