VLF: Pacific MSKs in Europe

[Markus Vester <markusvester@aol.com>]

The wideband panel at http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm is currently set to the military frequencies above 19 kHz.

In addition to NWC (Australia), which has been regularly visible here on 19.8 kHz above GBZ, I noticed that there is also a weak strip and corresponding hump on 21.4 kHz from NPM (Hawaii). It seems to be best in the morning hours, especially during the dips of its overwhelming neighbour HWU 21.75 kHz. It's very strong at KL7UK's grabber and also a clear peak on http://abelian.org/vlf/spectrum.shtml in Todmorden.

 

NAA 24.0 kHz is often remarkably strong on the samplerate edge,  and at times there is even a weak trace on 22.8 which seems to be an alias of NML 25.2 kHz.

 

NDT (Japan 22.2 kHz) has so far escaped my detection attempts, but it may be too difficult due to the proximity of GQD.

 

Best 73,
Markus (DF6NM)