Re: VLF: Transatlantic success East to West

[DK7FC <selberdenken@posteo.de>]

Thanks Paul, that was fast.

Am 07.12.2017 19:09, schrieb Paul Nicholson:
> > f = 17470.1000 Hz
> > Start time: 06.Dec.2017  22:00:00 UTC
> > Symbol period: 40 s
> > Characters: 3
> > CRC bits: 10
> > Coding 16K21A
>
> Correlates at Eb/N0 = -4.8 dB at Forest, -37.30 dB in 1Hz. 
That must have been a quiet night then.

So all these 3 days are quite noisy now :-/ Anyway, i'll keep trying. As 
you say it will take at least another night, probably 2 or even 3. But 
in the end it will be done!
Fascinating how stable the phase is over such a complex path! So the 
stacking could work over much longer paths as well.
We'll see...

73, Stefan


Am 13.12.2017 14:15, schrieb Paul Nicholson:
> Stefan wrote:
>
> > 3 transmissions are completed now.
> > Is there a decode? Or how much is missing?
>
> So far:
>
>  2017-12-10/11  Eb/N0 = -13.1 dB  (very noisy night)
>
>  2017-12-11/12  Eb/N0 =  -6.3 dB, phase 125.3
>
>  2017-12-12/13  Eb/N0 =  -6.8 dB, phase 143.2
>
> The phase is repeating well enough, when the signal is
> strong enough to measure!
>
> Stacking 11/12 + 12/13 gives Eb/N0 = -3.6 dB.
>
> Unless we have a relatively good night, it'll take
> another two nights average nights to accumulate enough
> signal to decode.
>
> --
> Paul Nicholson
> --