0 ≤ H ≤ 0.5
0.5 ≤ H ≤ 0.9
0.9 ≤ H ≤ 1
0 ≤ α ≤ 41.2
0 ≤ α ≤ 41
41.2 ≤ α ≤ 47.1
41 ≤ α ≤ 51
41 ≤ α ≤ 56
47.1 ≤ α ≤ 91.5
51 ≤ α ≤ 91
56 ≤ α ≤ 91