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From: MarkusVester@aol.com
Message-ID: <393.65c1419c.32b67eb4@aol.com>
Date: Sun, 17 Dec 2006 06:06:28 EST
To: rsgb_lf_group@blacksheep.org
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Subject: LF: The Sun on Loran
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Dear LF group,

the recent bursts of solar activity have also left their footprints on 100=20
kHz propagation.
http://freenet-homepage.de/df6nm/LoranView/LoranView_2006.htm=20
now has links to the November and December monitoring results, side by side=20
with solar x-ray flux plots from the Space Environment Center archive=20
http://www.sec.noaa.gov/ftpmenu/plots.html . The Loran-C data are presented=20=
at half=20
size. By postprocessing the original bitmaps, quantitative data like=20
fieldstrength or phase plots with 5 minute / 44 =B5s resolution can be gener=
ated here.

Generally, all C-class or stronger x-ray flares impress phase and amplitude=20
transients on signals travelling on sunlit paths - nice examples are Dec 5,=20=
9=20
and 14. One extraordinary event took place on Dec 13 03:00 UT, when nighttim=
e=20
propagation on northern paths was suddenly and deeply affected. It was=20
presumably caused by a burst of high energy protons, impacting into the pola=
r region=20
about half an hour after the X3 flare.

73 and best wishes
Markus, DF6NM

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<HTML><FONT FACE=3Darial,helvetica><HTML><FONT  SIZE=3D2 PTSIZE=3D10 FAMILY=
=3D"SANSSERIF" FACE=3D"Arial" LANG=3D"2">Dear LF group,<BR>
<BR>
the recent bursts of solar activity have also left their footprints on 100 k=
Hz propagation.<BR>
<A HREF=3D"http://freenet-homepage.de/df6nm/LoranView/LoranView_2006.htm">ht=
tp://freenet-homepage.de/df6nm/LoranView/LoranView_2006.htm</A> <BR>
now has links to the November and December monitoring results, side by side=20=
with solar x-ray flux plots from the Space Environment Center archive <A HRE=
F=3D"http://www.sec.noaa.gov/ftpmenu/plots.html">http://www.sec.noaa.gov/ftp=
menu/plots.html</A> . The Loran-C data are presented at half size. By postpr=
ocessing the original bitmaps, quantitative data like fieldstrength or phase=
 plots with 5 minute / 44 =B5s resolution can be generated here.<BR>
<BR>
Generally, all C-class or stronger x-ray flares impress phase and amplitude=20=
transients on signals travelling on sunlit paths - nice examples are Dec 5,=20=
9 and 14. One extraordinary event took place on Dec 13 03:00 UT, when nightt=
ime propagation on northern paths was suddenly and deeply affected. It was p=
resumably caused by a burst of high energy protons, impacting into the polar=
 region about half an hour after the X3 flare.<BR>
<BR>
73 and best wishes<BR>
Markus, DF6NM<BR>
</FONT></HTML>
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