cluster_id sec_channel
0 0
1 0
2 0
3 0
4 0
5 1
6 2
7 3
8 3
9 0
10 0
11 3
12 0
13 0
14 1
15 0
16 0
17 3
18 0
19 2
20 0
21 2
22 2
23 1
24 0
25 0
26 0
27 3