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Re: VLF: Finally back on the 58 km band...

To: [email protected]
Subject: Re: VLF: Finally back on the 58 km band...
From: DK7FC <[email protected]>
Date: Fri, 05 Jan 2018 17:29:30 +0100
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Am 05.01.2018 14:55, schrieb Paul Nicholson:
Stefan wrote:

> f = 5170.1000 Hz
> Start time: 29.Dec.2017  15:00:00 UTC
> Symbol period: 30 s
> Characters: 12
> CRC bits: 20
> Coding 16K21A
> Duration: 14:56 [hh:mm]


Warsaw (919.3 km SQ5BPF)
------------------------

 29/30 Eb/N0  -5.4 dB, S/N -34.4 dB/1Hz, phase -20.3;
 30/31 Eb/N0 -17.2 dB, S/N -46.2 dB/1Hz;
 31/01 Eb/N0  -7.8 dB, S/N -36.8 dB/1Hz, phase -44.2;
 01/02 Eb/N0  -6.1 dB, S/N -35.1 dB/1Hz, phase -36.1;
 02/03 Eb/N0  -8.2 dB, S/N -37.1 dB/1Hz, phase   2.9;
 03/04 Eb/N0 -10.2 dB, S/N -39.2 dB/1Hz, phase -33.1;
 04/05 Eb/N0  -8.1 dB, S/N -37.1 dB/1Hz, phase  -3.8;

 Seven stacked: Eb/N0 -0.8 dB;

Interesting. Tomorrow we may get a decode, or in 2 days. I like these stacking procedures. It makes things even more exciting.
I remember you wrote:

Am 27.12.2017 15:20, schrieb Paul Nicholson:
Stefan wrote:

> f = 5170.1000 Hz
> Start time: 23.Dec.2017  15:30:00 UTC (daily)
> Symbol period: 60 s
> Characters: 3
> CRC bits: 11
> Coding 16K21A
> Duration: 13:04 [hh:mm]

Warsaw (919.3 km SQ5BPF)
------------------------

 23/24 Eb/N0 -4.3 dB phase -37.4;
 24/25 Eb/N0 +2.2 dB phase -13.5, *Decoded*
 25/26 Eb/N0 -3.1 dB phase  -2.5;
26/27 Eb/N0 -0.2 dB phase -17.4, *Decoded*

...so there can be a decode of 3 chars in a single day but 12 chars take more than 7 days. Oh oh, it will be hard to get a decode from Alex. It will be interesting. In 5 days he will visit the garden again :-)

73, Stefan


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