Re: ULF: Key down signal on the 101 km band, still on the air

[Paul Nicholson <vlf0403@abelian.org>]

> Paul, any results in a bandwidth < 1 uHz ?

Not yet.

After some software alterations I've tried down to 1uHz
bandwidth (about 10 days integration) but not the slightest
trace.

Noise floor down there is around 0.003 fT.  Sferic blanker
is working well.

Tried integrating separately day and night, E and H and
combined and separate, blanking out the noisy periods, etc
in various combinations.  It's been a slow job even with a
quick computer - each run takes a long time to pass all the
signal through.

Disappointing, I thought we might have seen at least a hint
of signal.

I wonder if perhaps the signal is a bit too close to a
cavity mode and dispersion effects are messing up the phase.
This is uncharted territory.   LWPC doesn't give a solution
down here so can't use that as a guide.

Or maybe there's just not enough ERP.

Well, I haven't given up yet but for now I've run out of ideas.

--
Paul Nicholson
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