Dataset {
    Float32 lon[lon = 18];
    Float32 time[time = 1020];
    Grid {
     ARRAY:
        Float32 partial_lon[lon = 18][time = 1020];
     MAPS:
        Float32 lon[lon = 18];
        Float32 time[time = 1020];
    } partial_lon;
} partial_lon;