RSDN-20
Russia 11.905 kHz
RSDN-20
Russia 12.645 kHz
RSDN-20
Russia 14.881 kHz
TV
Sync. 15.734 kHz
HWU
France MSK 18.3 kHz
HWU
France MSK 20.9 kHz
NPM
Hawaii MSK 21.4 kHz
Unknown
MSK 22.7 kHz
Unknown
20.1 kHz
Power
Grid Harmonics
Spectrogram
of Man Made Signals
0430
UTC 03JAN2008 Fort Worth, TX - Steve Yates, AA5TB