Dataset {
  Grid {
    ARRAY:
      Float32 tau[time = 85000][lev = 6][lat = 721][lon = 1152];
    MAPS:
      Float64 time[time = 85000];
      Float64 lev[lev = 6];
      Float64 lat[lat = 721];
      Float64 lon[lon = 1152];
  } tau;
  Grid {
    ARRAY:
      Float32 tau_[time = 85000][lev = 6][lat = 721][lon = 1152];
    MAPS:
      Float64 time[time = 85000];
      Float64 lev[lev = 6];
      Float64 lat[lat = 721];
      Float64 lon[lon = 1152];
  } tau_;
  Grid {
    ARRAY:
      Float32 tau_fine[time = 85000][lev = 6][lat = 721][lon = 1152];
    MAPS:
      Float64 time[time = 85000];
      Float64 lev[lev = 6];
      Float64 lat[lat = 721];
      Float64 lon[lon = 1152];
  } tau_fine;
  Grid {
    ARRAY:
      Float32 cloud[time = 85000][lat = 721][lon = 1152];
    MAPS:
      Float64 time[time = 85000];
      Float64 lat[lat = 721];
      Float64 lon[lon = 1152];
  } cloud;
  Float64 time[time = 85000];
  Float64 lev[lev = 6];
  Float64 lat[lat = 721];
  Float64 lon[lon = 1152];
} AeroObs/3-hourly/HOLD/mydl.ctl;