Message-ID: <58AED3A0.7010706@posteo.de>
Date: Thu, 23 Feb 2017 13:20:48 +0100
From: DK7FC <selberdenken@posteo.de>
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References: <CAGZ2MyYDKx5B6HSg1Z7XeoWZigvDgVS8XLT82A1aXW6ogFxFqg@mail.gmail.com> <CAGZ2MyYvXEd4AoA2Evx+DDiCXJLMtcFvuE==LTxg=dEt4xXSww@mail.gmail.com> <58A6E5B8.6080007@posteo.de> <1487334367.396640876@f56.i.mail.ru> <58A6F8AF.70304@posteo.de> <58A8185E.600@posteo.de> <58A94DB4.7020005@posteo.de> <3ad8f7b7-5cbc-10c6-6816-a382ef25b29f@psk31.plus.com> <5F78A5280BA3412B9829C1E042E77593@AGB> <58A9A118.7050000@posteo.de> <OLNYV6$32689ED30984E988EAE91B325CCC8087@ik0vve.net> <58AAFE11.4060305@posteo.de> <OLP3BQ$C3FB68B3CBF9C6F86838A1F1078293F5@ik0vve.net> <58AC3E1C.8020800@posteo.de> <58ADAE49.6040608@posteo.de> <58ADE1B8.10009@posteo.de> <454f12d8-e89e-9f67-81fa-7de7891eefd1@psk31.plus.com>
In-Reply-To: <454f12d8-e89e-9f67-81fa-7de7891eefd1@psk31.plus.com>
Subject: Re: VLF: New EbNaut announcement...
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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 
> confirmation.
> ---------------------------------------------
> 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 night 
>>> 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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GM Eddie, Jacek, <br>
<br>
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' :-)<br>
<br>
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. <br>
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. <br>
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. <br>
BTW EA5DOM is also within this radius! :-)<br>
<br>
73, Stefan<br>
<br>
<br>
Am 23.02.2017 09:35, schrieb g3zjo:
<blockquote
 cite="mid:454f12d8-e89e-9f67-81fa-7de7891eefd1@psk31.plus.com"
 type="cite">
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
  <p>GM Stefan / Jacek<br>
  </p>
  <p>Successful decode in Northampton UK IO92ng. Message sent off list
for confirmation.<br>
---------------------------------------------<br>
found <b>XXXXXXXX </b><br>
list rank 0<br>
reference phase  180  180  180  180<br>
carrier RMS 6.366e-005 noise RMS 6.268e-006<br>
carrier S/N 20.14 dB in 24.8 uHz<br>
carrier Es/N0 -11.15 dB<br>
carrier Eb/N0 3.55 dB<br>
info bit period 884.21 seconds<br>
symbol error rate 505/1344 = 37.574 %<br>
Es/N0 from symbol errors -12.9 dB<br>
Eb/N0 from symbol errors 1.8 dB<br>
Shannon capacity 12.8 bits/hour<br>
Shannon efficiency 31.8 %<br>
elapsed 31 seconds</p>
  <p>73 Eddie G3ZJO<br>
  </p>
  <blockquote cite="mid:58ADE1B8.10009@posteo.de" type="cite">
    <blockquote cite="mid:58ADAE49.6040608@posteo.de" type="cite">
      <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
Hi all, <br>
      <br>
Hereby i'm announcing the next EbNaut attempt for a longer night
transmission, starting in a few hours:<br>
      <br>
      <big><b>f = 8270.100000 Hz<br>
Start time: 22.Feb.2017   18:00:00 UTC<br>
Symbol period: 30 s<br>
Characters: 8<br>
CRC bits: 16 <br>
Coding 16K21A<br>
Duration: 11h, 12m, 0s<br>
Antenna current: 700 mA</b></big><br>
      <br>
73, Stefan<br>
    </blockquote>
  </blockquote>
  <br>
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