Date: Thu, 7 Dec 2017 18:18:02 -0500
From: Markus Vester <markusvester@aol.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: VLF: TA east to west?
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A couple of American slow VLF-wideband grabbers showing HWU, JXN et al. mig=
ht come in helpful...  Laurence KL7 is seeing JXN strongly over the pole bu=
t that's probably too far north to serve as an indicator for Virginia. From=
 here, we can try to draw conclusions from NAA and NML traces, albeit that'=
s west-east and higher up the band. BTW SpecLab is also able to measure and=
 plot MSK phases, modulo 180=C2=B0.

In the morning, TA propagation from Alpha Krasnodar (can you look at 14.81 =
kHz?) will close down earlier than from Heidelberg and Todmorden. Night-to-=
day transitions should happen at similar times for both directions. I would=
 anyway expect that geomagnetic nonreciprocity would be less on 17 kHz than=
 on 8 kHz.=20

73, Markus

Paul wrote:

>> I notice from recent T/A west to east, W4DEX + VO1NA continue
with good S/N well into daylight. Also we don't see good
S/N before 23:00 or 00:00. The path seems to start late
and finish late. Perhaps the same is true of east to west?
We just don't know. This frequency, this path, this distance,
all completely new and we have no carrier tests to guide us.

Stefan wrote.

>> With 48 kS/s we could check when the terminator of JXN and HWU appear th=
ere.
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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;" abp=3D"2684">A couple of American slow VLF-wideband grab=
bers showing HWU,&nbsp;JXN et al. might come in helpful...&nbsp; Laurence K=
L7 is seeing JXN strongly over the pole but that's probably too far north t=
o serve as an indicator for Virginia. From here, we can try to draw conclus=
ions&nbsp;from NAA and NML traces, albeit&nbsp;that's west-east and higher =
up the band. BTW SpecLab is also able to measure and plot MSK phases, modul=
o 180=C2=B0.<br><br>In the morning, TA propagation from Alpha Krasnodar&nbs=
p;(can you look at 14.81 kHz?) will close down earlier than from Heidelberg=
&nbsp;and&nbsp;Todmorden. Night-to-day&nbsp;transitions should happen at si=
milar times for both directions. I would&nbsp;anyway expect that geomagneti=
c nonreciprocity&nbsp;would&nbsp;be&nbsp;less&nbsp;on 17 kHz than&nbsp;on 8=
 kHz. <br><br>73, Markus<br><br abp=3D"2686">Paul wrote:<br><br abp=3D"2700=
">&gt;&gt; I notice from recent T/A west to east, W4DEX + VO1NA continue<br=
 abp=3D"2701">with good S/N well into daylight.  Also we don't see good<br =
abp=3D"2702">S/N before 23:00 or 00:00.  The path seems to start late<br ab=
p=3D"2703">and finish late.   Perhaps the same is true of east to west?<br =
abp=3D"2704">We just don't know.  This frequency, this path, this distance,=
<br abp=3D"2705">all completely new and we have no carrier tests to guide u=
s.<br abp=3D"2706"><br>Stefan wrote.<br><br>&gt;&gt; With 48 kS/s we could =
check when the terminator of JXN and HWU appear there.<br><br abp=3D"2732">=
</div></div>
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