Dataset {
    Float32 S[S = 324];
    Float32 L[L = 1];
    Grid {
     ARRAY:
        Float32 hindcast_length[L = 1][S = 324];
     MAPS:
        Float32 L[L = 1];
        Float32 S[S = 324];
    } hindcast_length;
} hindcast_length;