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From: Dexter McIntyre W4DEX <dexter.mc@gmail.com>
Date: Wed, 27 Dec 2017 09:10:07 -0500
Message-ID: <CA+DS1V+pRLSvEOais5eauJ05YPsg540whXRBzty9irYZM4AhQg@mail.gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Re: VLF: New world record distance by W4DEX and IK1QFK
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Thanks Paul and Renato!   What's next?  WX for today looks questionable but
the next few days may be ok.

Dex

On Wed, Dec 27, 2017 at 2:21 AM, Paul Nicholson <vlf0403@abelian.org> wrote:

>
> W4DEX wrote:
>
> > 3 chars 16K21A CRC20
> > 30 second symbols
> > Start 22:30 UT
>
> Success!
>
> Decoded 'QRZ' at Cumiana (IK1QFK) with
> Eb/N0 = +0.4 dB, BER 41.6%;
>
> S/N -31.7 dB in 1Hz, -65.7 dB in 2.5kHz
> (after sferic blanking);
>
> List rank 5689, constant reference phase;
>
> Distance is 7173.4 km which is a new world record for
> VLF message decode and a record distance for EbNaut
> at all bands.
>
> Predicted Eb/N0 was +0.6 dB.
>
> Decoded via the live VLF stream from Renato's E-field
> receiver.
>
> These two stations already hold the record distance for
> carrier detection at VLF.  This result extends that to
> a message decode.
>
> Signal data available in vlfrx-tools format:
>
>  http://78.46.38.217/w4dex-171226-vlf15.vt
>
> Decode with
>
>  vtraw -oa w4dex-171226-vlf15.vt |
>    ebnaut -dp16K21A -r1 -S30 -k20 -N3 -v -PU -L500000
>
> Congratulations to both stations for a great result.
>
> --
> Paul Nicholson
> --
>
>
>


-- 
"Remember what the dormouse said......."

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<div dir=3D"ltr">Thanks Paul and=C2=A0<span style=3D"font-size:12.8px">Rena=
to!=C2=A0=C2=A0</span>=C2=A0What&#39;s next?=C2=A0 WX for today looks quest=
ionable but the next few days may be ok.=C2=A0=C2=A0<div><br></div><div>Dex=
</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On We=
d, Dec 27, 2017 at 2:21 AM, Paul Nicholson <span dir=3D"ltr">&lt;<a href=3D=
"mailto:vlf0403@abelian.org" target=3D"_blank">vlf0403@abelian.org</a>&gt;<=
/span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex"><br>
W4DEX wrote:<br>
<br>
&gt; 3 chars 16K21A CRC20<br>
&gt; 30 second symbols<br>
&gt; Start 22:30 UT<br>
<br>
Success!<br>
<br>
Decoded &#39;QRZ&#39; at Cumiana (IK1QFK) with<br>
Eb/N0 =3D +0.4 dB, BER 41.6%;<br>
<br>
S/N -31.7 dB in 1Hz, -65.7 dB in 2.5kHz<br>
(after sferic blanking);<br>
<br>
List rank 5689, constant reference phase;<br>
<br>
Distance is 7173.4 km which is a new world record for<br>
VLF message decode and a record distance for EbNaut<br>
at all bands.<br>
<br>
Predicted Eb/N0 was +0.6 dB.<br>
<br>
Decoded via the live VLF stream from Renato&#39;s E-field<br>
receiver.<br>
<br>
These two stations already hold the record distance for<br>
carrier detection at VLF.=C2=A0 This result extends that to<br>
a message decode.<br>
<br>
Signal data available in vlfrx-tools format:<br>
<br>
=C2=A0<a href=3D"http://78.46.38.217/w4dex-171226-vlf15.vt" rel=3D"noreferr=
er" target=3D"_blank">http://78.46.38.217/w4dex-171<wbr>226-vlf15.vt</a><br=
>
<br>
Decode with<br>
<br>
=C2=A0vtraw -oa w4dex-171226-vlf15.vt |<br>
=C2=A0 =C2=A0ebnaut -dp16K21A -r1 -S30 -k20 -N3 -v -PU -L500000<br>
<br>
Congratulations to both stations for a great result.<br>
<br>
--<br>
Paul Nicholson<br>
--<br>
<br>
<br>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><s=
pan style=3D"font-size:12.8px">&quot;Remember what the dormouse said.......=
&quot;</span><br></div></div>
</div>

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