Re: ULF: 5 wavelengths on the 101 km band? Valid or not?

[Paul Nicholson <vlf0403@abelian.org>]

I scraped the pixels off the Cumiana spectrogram,
(summing each row) and did my best guess of reversing
the mapping of power to pixel brightness.

 http://abelian.org/vlf/tmp/170211a.png

2970 is the strongest line.  At least 3 sigma, maybe 4,
depending on how you treat the lumpy floor.  A physicist
would insist on 5 sigma but the fact that the peak is
at exactly the right frequency is significant in itself.

Markus just wrote:

> In my humble opinion, this is clearly a successful
> detection.

I was doubtful looking at the spectrogram but having
plotted the pixels I am convinced.

Spectrograms aren't good for this sort of thing.  Oh
for a spectrum plot!   I couldn't get anything from
the stream recording, too many timing breaks on the
uplink.

Best I can get in Todmorden is 2 and a bit sigma
using just the daytime signal in 3.9 uHz.  Not
significant at all.  Would need at least another 7
days of transmission.

--
Paul Nicholson
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