Message-ID: <5800DC5D.2040502@posteo.de>
Date: Fri, 14 Oct 2016 15:23:41 +0200
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <157b05f2e7d-a71-85cc@webprd-a60.mail.aol.com> <57FC02C5.10700@posteo.de> <57FCA0EC.3000804@abelian.org> <57FCE651.7020809@posteo.de> <57FE04F2.9090208@abelian.org> <57FE4A79.2010904@posteo.de> <57FE907A.6040200@abelian.org>
In-Reply-To: <57FE907A.6040200@abelian.org>
Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
Content-Type: multipart/alternative;
 boundary="------------040604030902030408060905"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Content-Length: 3520
Status: O

This is a multi-part message in MIME format.
--------------040604030902030408060905
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Hi Paul,

Hmmmm, wellll, maybe there are some propagation behaviours on the band 
that we don't know yet. Could summer work better than winter, despite 
the higher average QRN levels? Who has the privilege to do 
private-research on a 'new' band? We!
So, i started a new message:

*f = 6470.00000 Hz
Start time: 14.10.2016   13:15:00 UTC
Symbol length: 60 s
Characters: 3
CRC 16
Coding 8K19A
Duration: 6h, 56m, 0s*
*Antenna current: 290 mA (ish)*

The QRN is very high now on VLF. But maybe this just indicates that 
propagation is better??? The QRN looks like as coming from far away, no 
local effects (yet).

Any news from the previous tests?

73, Stefan


Am 12.10.2016 21:35, schrieb Paul Nicholson:
>
> > f = 6470.00000 Hz
> > Start time: 12.10.2016   14:30:00 UTC
> > Symbol length: 40 s
> > Characters: 3
> > CRC 16
> > Coding 8K19A
>
> No decode, just a false hit ' WV' at Eb/N0 = -0.7.
>
> Strange.  According to carrier measurements this should
> be an easy decode at around +3db.
>
> More carrier measurements: night signal phase lags daytime
> by 60 degrees.  Night amplitude is about 0.1 fT.
>
> The 16K25A 15 char 140 second message should decode at
> about Eb/N0 +6dB.   So far no improvement on the partial
> decodes, next to try is correcting for that 60 deg diurnal.
>
> -- 
> Paul Nicholson
> -- 
>

--------------040604030902030408060905
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Paul, <br>
<br>
Hmmmm, wellll, maybe there are some propagation behaviours on the band
that we don't know yet. Could summer work better than winter, despite
the higher average QRN levels? Who has the privilege to do
private-research on a 'new' band? We!<br>
So, i started a new message:<br>
<br>
<big><b>f = 6470.00000 Hz<br>
Start time: 14.10.2016   13:15:00 UTC<br>
Symbol length: 60 s<br>
Characters: 3<br>
CRC 16<br>
Coding 8K19A<br>
Duration: 6h, 56m, 0s</b></big><br>
<big><b>Antenna current: 290 mA (ish)</b></big><br>
<br>
The QRN is very high now on VLF. But maybe this just indicates that
propagation is better??? The QRN looks like as coming from far away, no
local effects (yet).<br>
<br>
Any news from the previous tests?<br>
<br>
73, Stefan<br>
<br>
<br>
<br>
<br>
Am 12.10.2016 21:35, schrieb Paul Nicholson:
<blockquote cite="mid:57FE907A.6040200@abelian.org" type="cite"><br>
&gt; f = 6470.00000 Hz
  <br>
&gt; Start time: 12.10.2016   14:30:00 UTC
  <br>
&gt; Symbol length: 40 s
  <br>
&gt; Characters: 3
  <br>
&gt; CRC 16
  <br>
&gt; Coding 8K19A
  <br>
  <br>
No decode, just a false hit ' WV' at Eb/N0 = -0.7.
  <br>
  <br>
Strange.  According to carrier measurements this should
  <br>
be an easy decode at around +3db.
  <br>
  <br>
More carrier measurements: night signal phase lags daytime
  <br>
by 60 degrees.  Night amplitude is about 0.1 fT.
  <br>
  <br>
The 16K25A 15 char 140 second message should decode at
  <br>
about Eb/N0 +6dB.   So far no improvement on the partial
  <br>
decodes, next to try is correcting for that 60 deg diurnal.
  <br>
  <br>
--
  <br>
Paul Nicholson
  <br>
--
  <br>
  <br>
</blockquote>
</body>
</html>

--------------040604030902030408060905--