Jay and Stefan and you suggested I should transmit carrier for 1 hour on 29.49900 then move up 10 MHz [29.49901] for hour and back again a few times and then will start QRSS180. Does that make sense? Bob
> Date: Sun, 2 Mar 2014 19:06:37 +0000
> From:
[email protected]> To:
[email protected]> Subject: Re: LF: Would slower QRSS help?
>
> > I will be running in QRSS 180 tonight.
>
> Good luck. After last night's test maybe a few more receivers
> will be listening on 29499 Hz. I'm sure this signal will go
> a lot further than UK. It counts as a strong signal here
> and there is 10 or 20dB or more (depending on rx bandwidth)
> in hand to reach further into Europe.
>
> More plots: a graph of signal level and phase, 10 minute
> averages stepping 5 minutes.
>
> http://abelian.org/vlf/tmp/29499_140302k.gif
>
> The background noise is plotted after sferic blanking.
>
> On the spectrogram it looks like the noise tails off more
> sharply between 04:00 and 04:30 but when I actually plot
> the noise it's a quite smooth decline. But the signal is
> gradually coming up hence the appearance of a 'window' in the
> 2 or 3 hours before dawn.
>
> For comparison, NAA at 24kHz during the same period
>
> http://abelian.org/vlf/tmp/29499_140302m.gif
>
> Some pronounced dips during the night at 29499 Hz don't appear
> in the NAA record.
>
> --
> Paul Nicholson
> --
>
