Re: ULF: EbNaut over 3 wavelengths on ULF

[Paul Nicholson <vlf0403@abelian.org>]

On the 26th there was stormy weather all day near Marseille,
not exactly Heidelberg but it's a start.  It's in the right
quadrant but longer distance.

(It made me think of Garlaban and I ended up reading La lettre
de Lili des Bellons à Marcel Pagnol - moving and beautiful.)

I used vttoga to collect timings of all the sferics received at
Todmorden, Bielefeld and Cumiana during 10:00 to 14:00.  Then I
used vtspot to determine which sferics originated in the region
of Marseille.   This produced a list of 172 sferics to analyse.

I inspected each one using vtplot and discarded the scruffy
ones, keeping the best 54.

vtcmp -m pd360 then compared the phase angles from the three
rx channels during each sferic.

I concluded that the relative phase of the channels was just
as expected for this quadrant at 3kHz.  That means the
propagation cannot be doing anything too surprising with the
polarisation at this frequency.

--
Paul Nicholson
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