Dataset {
  Grid {
    ARRAY:
      Float32 ch4[time = 1000000][lev = 1][lat = 3298][lon = 9896];
    MAPS:
      Float64 time[time = 1000000];
      Float64 lev[lev = 1];
      Float64 lat[lat = 3298];
      Float64 lon[lon = 9896];
  } ch4;
  Float64 time[time = 1000000];
  Float64 lev[lev = 1];
  Float64 lat[lat = 3298];
  Float64 lon[lon = 9896];
} MergedIR;