Andy,
There's info on submarine transmissions on the vlf.it web site:
http://www.vlf.it/submarine/sbmarine.html
The U.S. closed down its ELF facility in Clam Lake Wisconsin in 2004.
It's interesting to note that it took 3 Megawatts to achieve an ERP of 8 watts!
Good write up at:
http://enterprise.spawar.navy.mil/UploadedFiles/fs_clam_lake_elf2003.pdf
--
73 Warren K2ORS
WD2XGJ 136-140kHz
WD2XSH/23 505-510kHz
WE2XEB/2 160-189kHz
WE2XGR/1 505-515kHz
FN42hi
http://www.w4dex.com/wd2xgj.htm
-------------- Original message ----------------------
From: "Andy Talbot" <[email protected]>
> Fascinating - just had to go and look-up Schumann resonances in Wikipedia.
> The article there says that the waveguide has a harmonic response at
> 59.4Hz, and gets excited by the US power grid. In which case I would
> have thought it ought to be visible, but there is nothing on the
> trace.
>
> Also, what looks like data at 80Hz - could that be a ULF submarine
> transmission? Those have been observed, and there used to be a website
> somwhere that showed slow FSK in the ULF region, believed to be from
> a Russian transmitter.
>
> Andy G4JNT
>
>
>
> On 08/11/2007, Wolfgang Büscher <[email protected]> wrote:
> > Greetings all,
> >
> > Not LF or MF, but this may be interesting for some group members:
> > Renato (IK1QFK) has set up a new automated ULF / ELF monitoring station :
> >
> > http://www.vlf.it/livedata.html
> >
> > It measures seismic (mechanical) events, the E-field, and the H-field
> > (the latter with radio direction finding).
> > It's amazing how clear the first few Schumann resonances can be seen in
> > the E-field spectrogram.
> >
> > Cheers,
> > Wolf DL4YHF .
> >
> >
> >
>
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