Message-ID: <5A95721D.2060008@posteo.de>
Date: Tue, 27 Feb 2018 15:58:37 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <b93789ed-2568-b4ef-49f2-851fd2d50026@bigpond.com>
In-Reply-To: <b93789ed-2568-b4ef-49f2-851fd2d50026@bigpond.com>
Subject: Re: LF: DL to VK7 ?
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Hi Edgar,

HWU reaches a respectable strength during times of best propagation. 
That makes hope.
The big question is, how stable is the phase during the times of best SNR.
There seems to be a window between 16...23 UTC with daily changing SNR 
vs. time, i.e. QSB. I expect that QSB means an unstable phase!

For the time window (7 hours) and expected phase stability it may be 
good to run one of the well known 424 uHz spectrograms. But that may not 
be sensitive enough to show a trace of my signal.
But what do you do if there is a trace suddenly! Just imagine, like in 
the old LF times.

The other idea is to try 1 character EbNaut messages, instead of a 
single 4...7 hour message we could try to repeat 1 hour long messages 
and then try to stack them or try to check if the message can be found 
just below the decode level (using the Linux decoder). This is probably 
more likely to work.

Another question may be, is the relative rapidly changing phase 
repeatable over some days? If so, we could stack these 1 hour messages 
segment wise...

So far, after two days, no sign of the 5 char message on Jay's side, but 
we'll continue tonite!

73, Stefan


Am 27.02.2018 09:23, schrieb Edgar:
>
> Is it possible?  Reception at Moonah, Tasmania.
>
>
>
> Regards, Edgar
> Moonah,Tasmania.

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Hi Edgar, <br>
<br>
HWU reaches a respectable strength during times of best propagation.
That makes hope. <br>
The big question is, how stable is the phase during the times of best
SNR. <br>
There seems to be a window between 16...23 UTC with daily changing SNR
vs. time, i.e. QSB. I expect that QSB means an unstable phase!<br>
<br>
For the time window (7 hours) and expected phase stability it may be
good to run one of the well known 424 uHz spectrograms. But that may
not be sensitive enough to show a trace of my signal. <br>
But what do you do if there is a trace suddenly! Just imagine, like in
the old LF times.<br>
<br>
The other idea is to try 1 character EbNaut messages, instead of a
single 4...7 hour message we could try to repeat 1 hour long messages
and then try to stack them or try to check if the message can be found
just below the decode level (using the Linux decoder). This is probably
more likely to work.<br>
<br>
Another question may be, is the relative rapidly changing phase
repeatable over some days? If so, we could stack these 1 hour messages
segment wise...<br>
<br>
So far, after two days, no sign of the 5 char message on Jay's side,
but we'll continue tonite!<br>
<br>
73, Stefan <br>
<br>
<br>
Am 27.02.2018 09:23, schrieb Edgar:
<blockquote cite="mid:b93789ed-2568-b4ef-49f2-851fd2d50026@bigpond.com"
 type="cite">
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  <br>
Is it possible?  Reception at Moonah, Tasmania.<br>
  <br>
  <br>
  <br>
Regards, Edgar<br>
Moonah,Tasmania.<br>
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