To: rsgb_lf_group@blacksheep.org
References: <15a5174bb3d-61e8-15c4e@webprd-m88.mail.aol.com>
From: DL4YHF <dl4yhf@freenet.de>
Message-ID: <36cfa6f6-f452-df08-f45f-eb5df19eb3ea@freenet.de>
Date: Sat, 18 Feb 2017 15:19:31 +0100
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In-Reply-To: <15a5174bb3d-61e8-15c4e@webprd-m88.mail.aol.com>
Subject: Re: VLF: EbNaut also on 8270.033333 Hz
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Hi VLFers,

Turn up the power, you may trigger a Whistler ... well, no, joking 
aside: At the moment there's an impressive whistler storm happening. 
Fascinating listening to Paul's internet VLF audio streams ( 
http://abelian.org/vlf/ ).

73,
   Wolf DL4YHF .

Am 18.02.2017 um 14:41 schrieb Markus Vester:
> Hi Jacek, VLF,
>
> from previous successful DK7FC decodes, it looks as if you might also 
> be able to receive a ~10 dB weaker signal from here (10 uW 
> EMRP). Apparently the rain has ended now, so I would like to try an 
> overnight EbNaut transmission with only two characters:
>
> Frequency: 8270.0333333 Hz,
> 2 characters, 8K19A, 18 bit CRC (!),
> 90 s symbols, message duration 9:36 hours,
> start 2017-02-18 19:00 UT, end 4:36 UT (Sunday)
>
> The 1/30 Hz frequency offset has been chosen to avoid mutual 
> interference with the announced DK7FC transmission on 8270.1 Hz: 
> With the frequency spacing being an integer multiple of both 
> symbolrates, and synchroneous bit timing, the symbol waveforms should 
> be orthogonal because the "other" signal always undergoes a whole 
> number of 360° cycles during the decoder's symbol integration interval.
>
> Best 73,
> Markus (DF6NM)
>
>
>
> -----Ursprüngliche Mitteilung-----
> Von: Jacek Lipkowski <sq5bpf@lipkowski.org>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> Verschickt: Di, 14. Feb 2017 17:23
> Betreff: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr 
> Moscow by RN3AUS
>
> Nice decode here for your transmission on 13 Fen 2017 20:40
>
> found rank 0 ber 3.0469e-01 Eb/N0 10.7 M -1.697070885e+01 [XX] ps [ 0 
> 0 0 0 0]
> carrier phase: 5.3
> carrier Eb/N0: 10.9
> carrier S/N: 21.44 dB in 32.6 uHz
> elapsed 29
>
> Switched the message to XX (sent to Stefan off list), so i don't spoil
> other's fun
>
> VY 73
>
> Jacek / SQ5BPF


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    Hi VLFers,<br>
    <br>
    Turn up the power, you may trigger a Whistler ... well, no, joking
    aside: At the moment there's an impressive whistler storm happening.
    Fascinating listening to Paul's internet VLF audio streams (
    <a class="moz-txt-link-freetext" href="http://abelian.org/vlf/">http://abelian.org/vlf/</a> ).<br>
    <br>
    73,<br>
      Wolf DL4YHF .<br>
    <br>
    <div class="moz-cite-prefix">Am 18.02.2017 um 14:41 schrieb Markus
      Vester:<br>
    </div>
    <blockquote
      cite="mid:15a5174bb3d-61e8-15c4e@webprd-m88.mail.aol.com"
      type="cite">
      <div
style="font-size:10pt;font-family:arial,helvetica,sans-serif;color:black;">
        <div style="color: black; font-family:
          arial,helvetica,sans-serif; font-size: 10pt;">Hi Jacek, VLF,<br>
          <br>
          from previous successful DK7FC decodes, it looks as if you
          might also be able to receive a ~10 dB weaker signal from here
          (10 uW EMRP). Apparently the rain has ended now, so I would
          like to try an overnight EbNaut transmission with only two
          characters:<br>
          <br>
          Frequency: 8270.0333333 Hz,<br>
          2 characters, 8K19A, 18 bit CRC (!),<br>
          90 s symbols, message duration 9:36 hours,<br>
          start 2017-02-18 19:00 UT, end 4:36 UT (Sunday) <br>
          <br>
          The 1/30 Hz frequency offset has been chosen to avoid mutual
          interference with the announced DK7FC transmission on 8270.1
          Hz: With the frequency spacing being an integer multiple of
          both symbolrates, and synchroneous bit timing, the symbol
          waveforms should be orthogonal because the "other"
          signal always undergoes a whole number of 360° cycles during
          the decoder's symbol integration interval.<br>
          <br>
          Best 73,<br>
          Markus (DF6NM)<br>
              <br>
          <br>
          <br>
          -----Ursprüngliche Mitteilung----- <br>
          Von: Jacek Lipkowski <a class="moz-txt-link-rfc2396E" href="mailto:sq5bpf@lipkowski.org">&lt;sq5bpf@lipkowski.org&gt;</a><br>
          An: rsgb_lf_group <a class="moz-txt-link-rfc2396E" href="mailto:rsgb_lf_group@blacksheep.org">&lt;rsgb_lf_group@blacksheep.org&gt;</a><br>
          Verschickt: Di, 14. Feb 2017 17:23<br>
          Betreff: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded
          nr Moscow by RN3AUS<br>
          <br>
        </div>
        Nice decode here for your transmission on 13 Fen 2017 20:40<br>
        <br>
        found rank 0 ber 3.0469e-01 Eb/N0 10.7 M -1.697070885e+01 [XX]
        ps [ 0 0 0 0 0]<br>
        carrier phase: 5.3<br>
        carrier Eb/N0: 10.9<br>
        carrier S/N: 21.44 dB in 32.6 uHz<br>
        elapsed 29<br>
        <br>
        Switched the message to XX (sent to Stefan off list), so i don't
        spoil <br>
        other's fun<br>
        <br>
        VY 73<br>
        <br>
        Jacek / SQ5BPF<br>
      </div>
    </blockquote>
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