Message-ID: <56D306B8.4050805@posteo.de>
Date: Sun, 28 Feb 2016 15:39:52 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <8D34021D110227C-1C54-6EA470@webmail-vm008.sysops.aol.com> <8D3404957FA6EB0-15A0-5F7E24@webmail-vd012.sysops.aol.com>
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Subject: Re: VLF: EbNaut 8270.1, Sunday Feb 28 (carrier)
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Hello Markus,

Very nice and stable signal!
Due to the phase glitches produces by the old PC (hopefully the only 
reason) i moved the 3 SL instances to a newer PC. This one is now 
running the complete forest stuff, 14 SL instances and 2 WSPR instances 
:-) Thus the captures are lost. Hopefully the new ones show a stable 
trace of the Alpha signal...

73, Stefan

Am 28.02.2016 15:13, schrieb Markus Vester:
> The carrier was on from 9:25 to 12 UT with 0.34 A (13 uW ERP) and 
> continuous phase. This test produced some surprising results:
> As expected, a nice continuous dash appeared on Stefan's city-grabber 
> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html in the 
> 0.42 mHz window. It is somewhat weaker than that from Friday 
> afternoon, probably due to the midday minimum for our distance.
> A few bright pixels also showed up on Stefan's new tree-grabber 
> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html , albeit 
> close to the noise and perhaps disrupted by a phase glitch. If the 
> signal is real, it's a complete surprise as I am due east from 
> Heidelberg and should be exactly in the minimum of the N-S receive 
> loop. One could perhaps speculate about steep skywave and Faraday 
> rotation...
> On Lubos' grabber http://www.ok2bvg.cz/vlf_grabber/index.html the 
> signal appeared again with excellent SNR up to 20 dB. However although 
> this receiver is usually glitch-free, there seems to be a break in the 
> middle ~ 11 UT which is not visible in Heidelberg.
> At the same time, Paul's spectrogram 
> http://abelian.org/vlf/fbins.shtml#p=1456660800&b=110&s=sp 
> <http://abelian.org/vlf/fbins.shtml#p=1456660800&b=110&s=sp>  (110°) 
> also shows a gap in the dash. However when the compass rose is steered 
> towards 140°, the signal comes up exactly at the time of the gap. So 
> it looks as if the direction of arrival would have temporarily been 
> slewed southwards. Very strange...
> All the best,
> Markus (DF6NM)
>

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Hello Markus, <br>
<br>
Very nice and stable signal!<br>
Due to the phase glitches produces by the old PC (hopefully the only
reason) i moved the 3 SL instances to a newer PC. This one is now
running the complete forest stuff, 14 SL instances and 2 WSPR instances
:-) Thus the captures are lost. Hopefully the new ones show a stable
trace of the Alpha signal...<br>
<br>
73, Stefan<br>
<br>
Am 28.02.2016 15:13, schrieb Markus Vester:
<blockquote
 cite="mid:8D3404957FA6EB0-15A0-5F7E24@webmail-vd012.sysops.aol.com"
 type="cite">
  <div style="color: black; font-family: arial; font-size: 10pt;"><span
 style="display: inline-block;" contenteditable="false"></span></div>
  <div> The carrier was on from 9:25 to 12 UT with 0.34 A (13 uW ERP)
and continuous phase. This test produced some surprising results: <br>
  </div>
  <div>As expected, a nice continuous dash appeared on Stefan's
city-grabber <a moz-do-not-send="true"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html</a> in
the 0.42 mHz window. It is somewhat weaker than that from Friday
afternoon, probably due to the midday minimum for our distance.</div>
  <div> </div>
  <div>A few bright pixels also showed up on Stefan's new tree-grabber <a
 moz-do-not-send="true"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a> ,
albeit close to the noise and perhaps disrupted by a phase glitch. If
the signal is real, it's a complete surprise as I am due east from
Heidelberg and should be exactly in the minimum of the N-S receive
loop. One could perhaps speculate about steep skywave and Faraday
rotation...</div>
  <div> </div>
  <div>On Lubos' grabber <a moz-do-not-send="true"
 href="http://www.ok2bvg.cz/vlf_grabber/index.html">http://www.ok2bvg.cz/vlf_grabber/index.html</a> the
signal appeared again with excellent SNR up to 20 dB. However although
this receiver is usually glitch-free, there seems to be a break in the
middle ~ 11 UT which is not visible in Heidelberg.</div>
  <div> </div>
  <div>At the same time, Paul's spectrogram <a moz-do-not-send="true"
 href="http://abelian.org/vlf/fbins.shtml#p=1456660800&amp;b=110&amp;s=sp">http://abelian.org/vlf/fbins.shtml#p=1456660800&amp;b=110&amp;s=sp</a> 
(110°) also shows a gap in the dash. However when the compass rose
is steered towards 140°, the signal comes up exactly at the time of the
gap. So it looks as if the direction of arrival would have temporarily
been slewed southwards. Very strange...</div>
  <div> </div>
  <div>All the best,</div>
  <div>Markus (DF6NM)</div>
  <br>
</blockquote>
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