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Re: VLF: New EbNaut announcement...

To: [email protected]
Subject: Re: VLF: New EbNaut announcement...
From: Jacek Lipkowski <[email protected]>
Date: Thu, 23 Feb 2017 13:49:03 +0100 (CET)
In-reply-to: <[email protected]>
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User-agent: Alpine 2.11 (DEB 23 2013-08-11)
and for the next step, maybe there is someone on the list who lives near the magnetic conjugate point from you :) this would probably be around africa

On Thu, 23 Feb 2017, DK7FC wrote:

Date: Thu, 23 Feb 2017 13:20:48 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: VLF: New EbNaut announcement...

GM Eddie, Jacek,

Thanks for the decode, i confirm the message is correct ;-) With such long 
messages, a false decode
that makes some sense becomes most unlikely. I would never send messages like 
'h;?T 7!F' :-)

Jacek, the QRN looked quite low here last night. Anyway i would say there is a 
clear SNR improvement
on your side. We could certainly manage longer messages but then we may exclude 
some newcomers.
Actually i am now in the situation to run daily VLF transmissions, even during 
rain. The antenna
current was almost stable at 700 mA during the whole transmission time.
I'm now waiting for a feedback from Alex/RN3AUS, and i am optimistic. You 
already see, the messages
become longer and longer. The next attempt would be 10 characters which still 
seems to be realistic
for a radius of 2000 km.
BTW EA5DOM is also within this radius! :-)

73, Stefan

Am 23.02.2017 09:35, schrieb g3zjo:

      GM Stefan / Jacek

      Successful decode in Northampton UK IO92ng. Message sent off list for 
      found XXXXXXXX
      list rank 0
      reference phase  180  180  180  180
      carrier RMS 6.366e-005 noise RMS 6.268e-006
      carrier S/N 20.14 dB in 24.8 uHz
      carrier Es/N0 -11.15 dB
      carrier Eb/N0 3.55 dB
      info bit period 884.21 seconds
      symbol error rate 505/1344 = 37.574 %
      Es/N0 from symbol errors -12.9 dB
      Eb/N0 from symbol errors 1.8 dB
      Shannon capacity 12.8 bits/hour
      Shannon efficiency 31.8 %
      elapsed 31 seconds

      73 Eddie G3ZJO

                  Hi all,

                  Hereby i'm announcing the next EbNaut attempt for a longer 
                  transmission, starting in a few hours:

                  f = 8270.100000 Hz
                  Start time: 22.Feb.2017   18:00:00 UTC
                  Symbol period: 30 s
                  Characters: 8
                  CRC bits: 16
                  Coding 16K21A
                  Duration: 11h, 12m, 0s
                  Antenna current: 700 mA

                  73, Stefan

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