http://air-radiorama.blogspot.it/2017/06/daily-recurrent-ladders-in-vlf.html
http://air-radiorama.blogspot.it/2017/06/the-solution-daily-recurrent-ladders-in.html
https://air-radiorama.blogspot.it/2017/06/following-posts-at-links-httpair.html
I have recorded and demodulated the first pattern that occurs daily at 9:00 UTC , the stronger one .
The CW identification ,transmitted fast for a minute, is : RJH69 that is the nearest station in Belarus .
Time sequence and other modulations was found accordinghly to the good document at :
http://www.vlf.it/russianvlf/russianvlf.htm
The following spectrogram tells much more than descriptions :
Here the map of the stations :
