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Re: VLF: Back on 5.17 kHz / 58 km...

To: [email protected]
Subject: Re: VLF: Back on 5.17 kHz / 58 km...
From: Markus Vester <[email protected]>
Date: Fri, 6 Jan 2017 04:48:49 -0500
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Reply-to: [email protected]
Sender: [email protected]
Hi Stefan, Paul,

so that  makes a fine record of 5.17 kHz successes between the two of you! Wonder what will be possible when Stefan goes to max voltage on 2.97 kHz?

I'm trying to keep track of the 60 s PSK traces on the tree grabber. There was a 12.5 h transmission on Jan 4th, and a similar one lasting 23.5 h on 5th/6th. As the duration of 8 characters 16k25 should be 23h 28min, the latter was probably the right one.

I'd still like to look for a daytime carrier here, 1.25 mHz below or above 5170 Hz.

All the best,
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 6 Jan 2017 10:06 am
Betreff: Re: VLF: Back on 5.17 kHz / 58 km...

Stefan wrote:

> f = 5170.000000 Hz
> Start time: 04.Jan.2017 08:00:00 UTC
> Symbol length: 60 s
> Characters: 8
> CRC 16
> Coding 16K25A

> I will repeat the transmission starting [5th] 8 UTC...

Easy decode, +3.3dB with constant reference phase.

Decoder continues to run, I expect a better decode with
some phase pattern that compensates for the day/night

Paul Nicholson

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