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Re: VLF: Tonite...

To: [email protected]
Subject: Re: VLF: Tonite...
From: Jacek Lipkowski <[email protected]>
Date: Wed, 8 Mar 2017 19:32:34 +0100 (CET)
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Alpine 2.11 (DEB 23 2013-08-11)
received the 20170307 transmission (message sent to Stefan for verification)
prep [  0    0    0    0    0]
found rank 0 ber 2.8720e-01 Eb/N0 6.7 M -3.842122555e+00 [XXXXXXXX] ps [0    0  
  0    0    0]
carrier phase: -0.0
carrier Eb/N0: 6.6
carrier S/N: 23.20 dB in 24.8 uHz
elapsed 42


this was received using a new antenna, not sure if its better or worse than the usual one
VY 73

Jacek / SQ5BPF


On Tue, 7 Mar 2017, DK7FC wrote:

Date: Tue, 07 Mar 2017 23:37:13 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: VLF: Tonite...

VLF,

I'm trying another 8 character message, just to get a clear decode from Alex. 
Of course all reports are welcome, as usual :-)
The message has started to late again but not as late as the last one, so maybe 
there will be a clear decode. On the other side there
is more QRN now. Some day we will need a tool for stacking/ combining multiple 
wav files under windows! It would make things easy on
that path.

Now:

f = 8270.100000 Hz
Start time: Tuesday 07.Mar.2017   22:20:00.3
Symbol period: 30 s
Characters: 8
CRC bits: 16
Coding 16K21A
Duration: 11h, 12m, 0s
Antenna current: 700 mA

Based on the last carrier S/N of Alex' last decode this could be the result:
http://abelian.org/ebnaut/calc.php?sndb=15.87&snbws=0.000035&snmps=&code=16K21&sp=30&crc=16&nc=8&submit=Calculate
But some hours will fall into daylight, so it will be quite close to the limit 
again! :-)

73, Stefan
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