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Re: VLF: A weekend for newcomers and advanced newcomers...

To: [email protected]
Subject: Re: VLF: A weekend for newcomers and advanced newcomers...
From: DK7FC <[email protected]>
Date: Sun, 26 Feb 2017 12:03:40 +0100
In-reply-to: <[email protected]>
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Thanks Eddie, Jacek and Paul for the decode.
The message is correct :-)

Alex/RN3AUS will have to search for 3 EbNaut messages now, 8ch, 10ch and 4 ch :-)

The normal carrier on 8270.005 Hz is still running. It will stay on the air until the EbNaut message begins.

The WX forecast looks good so i will try another EbNaut transmission. 12 characters, a critical value on the path to Moscow but who knows, maybe the QRN is low... We will come quite close to the limit!

f = 8270.100000 Hz
Start time: Sunday 26.Feb.2017   18:00:00 UTC
Symbol period: 24 s
Characters: 12
CRC bits: 14
Coding 16K21A
Duration: 8h, 32m, 0s
Antenna current: 700 mA

This is beyond the decode skills of my PC but i assume that many of you will have a better system available. Alex has 8 GB RAM at least so it will be possible and i stay at 16K21A.


73, GL, Stefan




Am 26.02.2017 10:16, schrieb g3zjo:

Nice decode of Stefan's Transmission, application for confirmation sent by PM.

found XXXX
list rank 0
reference phase    0    0    0    0
carrier RMS 5.550e-005 noise RMS 7.109e-006
carrier S/N 17.85 dB in 32.6 uHz
carrier Es/N0 -12.25 dB
carrier Eb/N0 4.27 dB
info bit period 1347.37 seconds
symbol error rate 392/1024 = 38.281 %
Es/N0 from symbol errors -13.5 dB
Eb/N0 from symbol errors 3.0 dB
Shannon capacity 10.0 bits/hour
Shannon efficiency 26.7 %
elapsed 5 seconds

73 Eddie G3ZJO


f = 8270.100000 Hz
Start time: Saturday 25.Feb.2017   20:00:00 UTC
Symbol period: 30 s
Characters: 4
CRC bits: 20
Coding 16K21A
Duration: 8h, 32m, 0s
Antenna current: 700 mA

73, Stefan

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