Message-ID: <BLU146-W188C8638FE74B3AC0A4272CFB90@phx.gbl>
From: Laurence KL7UK <hellozerohellozero@hotmail.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Fri, 25 Mar 2011 06:03:28 -0800
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In-Reply-To: <4D8B86E7.20602@iup.uni-heidelberg.de>
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 <8CDB82718FF0CEC-B4C-BB65@webmail-d038.sysops.aol.com>,<4D8B86E7.20602@iup.uni-heidelberg.de>
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Subject: LF: Phase and FFT's
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=20
I think what I find fascinating is the absolute variations from day to day=
 on th Alaska to Eu path, and how each VLF signal has its own independant=
 phase and amp signature variation over a 24 hour period - and wondering=
 why for instance DH038 can have (does have) one of the largest dawn/dusk=
 deltas compared with similar bearing(d) Eu VLF signals - I just dont see=
 as much from reasonably co-located transmitters.
=20
I too dont get the  same for non-Auroral zone paths, though Im sure Im get=
ting signals coming in skewed at times, and "noisy" rapid phase variations=
 too which are obvious on the faster FFT's/snappers akin to Markus's Loran=
 plots - perhaps net affects from the Alaskan range, Rockies or Andes and=
 not just the Electrons/Protons or short term variations in heating.
=20
Im sure the maths is there and probably something to do with the two-cross=
ings of the Auroral oval, the small but inclusive depointing of the loop,=
 but wondering or mulling if DHo38 and similar are launching into the "wav=
eguide" differently or there is some V/H directional component bespoke to=
 each VLF transmission maybe caused by ground conditions within a few lamb=
da...
=20
Must be a Friday.
=20
Laurence KL7UK remote ops from  Oklahoma
=20
ps still dont have control of the VLF rx up in Alaska but hoping it will=
 be restored today..

                      =3D

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&nbsp;<BR>
I think what I find fascinating is the absolute variations from day to day=
 on th Alaska to Eu path, and how each VLF signal has its own independant=
 phase and amp signature variation over a 24 hour period - and wondering=
 why for instance DH038 can have (does have) one of the largest dawn/dusk=
 deltas compared with similar bearing(d) Eu VLF signals - I just dont see=
 as much from reasonably co-located transmitters.<BR>
&nbsp;<BR>
I too dont get the&nbsp; same for non-Auroral zone paths, though Im sure=
 Im getting signals coming in skewed at times, and "noisy" rapid phase var=
iations too which are obvious on the faster FFT's/snappers akin to Markus'=
s Loran&nbsp;plots - perhaps net affects from the Alaskan range, Rockies=
 or Andes and not just the Electrons/Protons or short term variations in=
 heating.<BR>
&nbsp;<BR>
Im sure the maths is there and probably something to do with the two-cross=
ings of the Auroral oval, the small but inclusive depointing of the loop,=
 but wondering or mulling if DHo38 and similar are launching into the "wav=
eguide" differently or there is some V/H directional component bespoke to=
 each VLF transmission maybe caused by ground conditions within a few lamb=
da...<BR>
&nbsp;<BR>
Must be a Friday.<BR>
&nbsp;<BR>
Laurence KL7UK remote ops from &nbsp;Oklahoma<BR>
&nbsp;<BR>
ps still dont have control of the VLF rx up in Alaska but hoping it will=
 be restored today..<BR><BR>
&nbsp;<BR>                     </body>
</html>=3D

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