Dataset {
    Int32 P[P = 17];
    Float32 Y[Y = 72];
    Float32 X[X = 144];
    Grid {
     ARRAY:
        Float64 phi[P = 17][Y = 72][X = 144];
     MAPS:
        Int32 P[P = 17];
        Float32 Y[Y = 72];
        Float32 X[X = 144];
    } phi;
} phi;