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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <4CAE2956.50803@iup.uni-heidelberg.de>
Date: Thu, 7 Oct 2010 23:20:02 +0100
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Subject: LF: Re: interesting LF propagation
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Hi Stefan, yes this will happen ....look at the wavelength of 136 and=
 it is
about 2.2km it does not take much vertical movement of the night-time
"reflection layer" to sweep through a full phase cycle and the extinct=
ion
where the ground and sky cancle with be different for you and Markus.
Locations varying by as little as 10km often see this effect. Mike has=
 quite
a big signal.

Alan G3NYK


----- Original Message -----=20
From: "Stefan Sch=E4fer" <schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, October 07, 2010 9:11 PM
Subject: LF: interesting LF propagation


> I just saw that Mike/G3XDV appears very much stronger on my grabber
> _after_ 19 UTC while he is much stronger _before_ 19 UTC on the DF6N=
M
> grabber and almost invisible after 19 UTC. The difference of distanc=
e
> between Markus and me is about 180 km. QRN is not the reason but the
> signal strengh itselfe.
>
>
>
>
> I assume this effect is not been observed the first time ;-)
>
> The two dots apper strong on both locations. So it was a 'dip'?
>
>
>
> 73, Stefan
>


----------------------------------------------------------------------=
------
----


> I just saw that Mike/G3XDV appears very much stronger on my grabber=
 after
19 UTC while he is much stronger before 19 UTC on the DF6NM grabber an=
d
almost invisible after 19 UTC. The difference of distance between Mark=
us and
me is about 180 km. QRN is not the reason but the signal strengh itsel=
fe.
>
>
>
>
> I assume this effect is not been observed the first time ;-)
>
> The two dots apper strong on both locations. So it was a 'dip'?
>
>
>
> 73, Stefan
>