Date: Mon, 19 Feb 2018 12:05:44 -0500
From: Markus Vester <markusvester@aol.com>
To: rsgb_lf_group@blacksheep.org
Message-Id: <161af073fa5-c86-13005@webjas-vac009.srv.aolmail.net>
In-Reply-To: <5A8AE616.2030906@posteo.de>
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Subject: Re: VLF: DK7FC > W1VD 8.27 kHz EbN0 success!
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Wow that's almost too good to be true! The "holy grail" of E-W transatlanti=
c, achieved in a single good night. Congratulations to Jay and Stefan, for =
boldly daring this experiment and bringing it to this surprising success!=
=20

Best 73,
Markus (DF6NM)

-----Urspr=C3=BCngliche Mitteilung-----=20
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 19. Feb 2018 16:00
Betreff: Re: VLF: DK7FC > W1VD 8.27 kHz EbN0 success!


Hi Jay, VLF,=20

 An excellent achievement below 9 kHz! And even from a single night, withou=
t stacking!!! I expected we will need about a week, or even more.

 To leave a carrier trace or even a message decode over that path, from eas=
t to west, was one of the goals during the kite experiments in 2010/2011, w=
here my ERP was 20 dB higher. We mever managed that. Until now!

 So maybe the E>W path is less than 20 dB harder. That opens the door for m=
ore imaginations about VLF DX, not only for me.

 We need to proove that this is reproducable :-) So let me try a 2 characte=
r message starting this night:

f =3D 8270.1000 Hz
 Start time: 19.FEB.2018  22:3:00 UTC (daily)
 Symbol period: 30 s
 Characters: 2
 CRC bits: 22
 Coding 16K21A
 Duration: 07:12 [hh:mm]
 Antenna current: 700 mA

 In the attachment one can see the results put out by the Linux decoder run=
ning on the file you sent me this morning. Only right decodes and improving=
 rank.

 Can we really expect 2 characters in 2 days? We will see! Let's go!

 73, Stefan


 Am 19.02.2018 15:41, schrieb jrusgrove@comcast.net:=20
#AOLMsgPart_1.2_8e2173d5-64ea-48f1-b39f-d7976542a9ff td{color: black;} .aol=
ReplacedBody { margin:0.7em; } .aolReplacedBody body.aolmail_OECFntDef,.aol=
ReplacedBody body.aolmail_OECFntDef div { font-family:Arial,"Segoe UI",Taho=
ma,Verdana,Helvetica,sans-serif;font-size:10pt; }=20
Stefan's transmission:

=20

f =3D 8270.1000 Hz
 Start time: 12.FEB.2018  22:32:00 UTC (daily)
 Symbol period: 32 s
 Characters: 1
 CRC bits: 24
 Coding 16K21A
 Duration: 07:06:40 [hh:mm:ss]
 Antenna current: 700 mA


After a week of trying ... including two nights with TX problems, one night=
 with RX problems and one night with high noise levels ... a successful dec=
ode of Stefan's message was made on last night's transmission. s/n in 39 uH=
z 10.5 dB and Eb/N0 2.54 dB. It was pretty convincing as the decode popped =
up in the 0,0,0,0 phase trial and only improved thereafter.

=20

Congrats Stefan on what appears to be the first E>W T/A on Dreamers Band!

=20

Jay W1VD=20

=20

=20

   
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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"color: black; font-family: arial,helvetica,sans-serif;=
 font-size: 10pt;">Wow that's almost too good to be true! The&nbsp;"holy gr=
ail" of E-W transatlantic, achieved in a single good night.&nbsp;Congratula=
tions to Jay and Stefan, for boldly daring this&nbsp;experiment and bringin=
g it to this surprising success!&nbsp;<br><br>Best 73,<br>Markus (DF6NM)<br=
><br>-----Urspr=C3=BCngliche Mitteilung----- <br>Von: DK7FC &lt;selberdenke=
n@posteo.de&gt;<br>An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&gt;<b=
r>Verschickt: Mo, 19. Feb 2018 16:00<br>Betreff: Re: VLF: DK7FC &gt; W1VD 8=
.27 kHz EbN0 success!<br><br></div>
<div id=3D"AOLMsgPart_1.2_8e2173d5-64ea-48f1-b39f-d7976542a9ff">
<div class=3D"aolReplacedBody" text=3D"#000000" bgcolor=3D"#ffffff">
Hi Jay, VLF, <br>
<br>
An excellent achievement below 9 kHz! And even from a single night,
without stacking!!! I expected we will need about a week, or even more.<br>
<br>
To leave a carrier trace or even a message decode over that path, from
east to west, was one of the goals during the kite experiments in
2010/2011, where my ERP was 20 dB higher. We mever managed that. Until
now!<br>
<br>
So maybe the E&gt;W path is less than 20 dB harder. That opens the door
for more imaginations about VLF DX, not only for me.<br>
<br>
We need to proove that this is reproducable :-) So let me try a 2
character message starting this night:<br>
<br>
<strong>f =3D 8270.1000 Hz<br>
Start time: 19.FEB.2018&nbsp; 22:3:00 UTC (daily)<br>
Symbol period: 30 s<br>
Characters: 2<br>
CRC bits: 22<br>
Coding 16K21A<br>
Duration: 07:12 [hh:mm]<br>
Antenna current: 700 mA</strong><br>
<br>
In the attachment one can see the results put out by the Linux decoder
running on the file you sent me this morning. Only right decodes and
improving rank.<br>
<br>
Can we really expect 2 characters in 2 days? We will see! Let's go!<br>
<br>
73, Stefan<br>
<br>
<br>
<br>
<br>
Am 19.02.2018 15:41, schrieb <a class=3D"aolmail_moz-txt-link-abbreviated" =
href=3D"mailto:jrusgrove@comcast.net:" target=3D"_blank" rel=3D"noopener no=
referrer">jrusgrove@comcast.net:</a>
<blockquote cite=3D"about:blank">
  <style type=3D"text/css">#AOLMsgPart_1.2_8e2173d5-64ea-48f1-b39f-d7976542=
a9ff td{color: black;}  .aolReplacedBody   { margin:0.7em; } .aolReplacedBo=
dy body.aolmail_OECFntDef,.aolReplacedBody  body.aolmail_OECFntDef div { fo=
nt-family:Arial,"Segoe UI",Tahoma,Verdana,Helvetica,sans-serif;font-size:10=
pt; }</style>
 =20
  <div>Stefan's transmission:</div>
  <div>&nbsp;</div>
  <div><strong>f =3D 8270.1000 Hz<br>
Start time: 12.FEB.2018&nbsp; 22:32:00 UTC (daily)<br>
Symbol period: 32 s<br>
Characters: 1<br>
CRC bits: 24<br>
Coding 16K21A<br>
Duration: 07:06:40 [hh:mm:ss]<br>
Antenna current: 700 mA</strong><br>
  </div>
  <div>After a week of trying ... including two nights with&nbsp;TX
problems, one night with RX problems and one night with high noise
levels&nbsp;...&nbsp;a successful decode of Stefan's&nbsp;message was made =
on last
night's transmission. s/n in 39 uHz 10.5 dB&nbsp;and Eb/N0 2.54 dB. It was
pretty convincing as the decode&nbsp;popped up in the 0,0,0,0 phase trial
and only improved thereafter.</div>
  <div>&nbsp;</div>
  <div>Congrats Stefan on what appears to be the&nbsp;first E&gt;W T/A on
Dreamers Band!</div>
  <div>&nbsp;</div>
  <div>Jay W1VD&nbsp;</div>
  <div>&nbsp;</div>
  <div>&nbsp;</div>
  <div>&nbsp;&nbsp;&nbsp;&nbsp;</div>
</blockquote>


</div>
</div>

<br></div>
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