priyom.org

Fixed Frequency Network

This network consists of a group of M12 schedules that deviate from the standard Russian 7 habits. These schedules:

  • use the same frequency set and ID all year round; those sets and IDs are selected from a small pool.
  • never send null messages, always delivering new traffic of roughly the same group count every time.
  • rarely repeat messages later the same week; when it happens, it takes place on another schedule using a different ID, complicating traffic analysis.
  • do not broadcast during at least some Russian national holidays, a behavior not exhibited by any typical Russian 7 schedule.

The known frequency sets and IDs of this network are listed below:

T+0 T+20 T+40 ID
Ascending
9317 10484 11552 135
10624 11449 12133 492
12205 13559 14728 973
Descending
8047 6802 5788 463
9176 7931 6904 257
10343 9264 8116 124
11435 10598 9327 938
12162 11566 10711 546
13386 12189 11491 725
14377 13461 12114 317

The known schedules of this network are listed below:

Day UTC kHz UTC kHz UTC kHz ID
Tuesday 18:00 12162 18:20 11566 18:40 10711 546
Saturday 18:00 11435 18:20 10598 18:40 9327 938