cluster_id sec_channel
0 1
1 2
2 1
3 3
4 0
5 1
7 3
8 3
9 0
10 0
11 2
13 0
16 2
17 2
19 0
20 0
21 1
22 0
23 0
24 0
25 0
26 0
27 0
28 0
30 0
31 0
32 0
33 0
34 0