Nice work, I think of 510 km at 6.47 kHz as a new frontier in part because
modal (Hollingworth) effects are so sensitive to (everything?) at distances and
frequencies in that neighborhood. LWPC and other VLF modeling tools may at best
provide a rough estimate of seasonal averages in that realm. Adding the Alps to
your configuration makes your result a valuable first for propagation studies,
in my opinion.
From: [email protected]
[mailto:[email protected]] On Behalf Of DK7FC
Sent: Saturday, May 21, 2016 10:06 AM
To: [email protected]; Renato Romero
Subject: VLF: Crossing the Alps on the 46 km band
I managed to leave a trace on Renato Romereos updated VLF dreamers grabber
spectrogram at http://www.vlf.it/cumiana/livedata.html.
The 510 km path crosses the alps, see
There is a clear trace at 6470.0000 Hz with an estimated SNR of up to 15 dB. It
would be possible to send my call in DFCW-60000 i think.
My carrier is running since 21:30 UTC last night and is still on the air. Most
likely i will continue to run it until 4 UTC tomorrow, then i'm starting a new
The grabber has proved to run stable and sensitive, an invitation for other
stations beeing able to transmit on 8.27 kHz or 6.47 kHz.