Message-ID: <1E47139B8DD7469588956FCFFA3EBD9C@gnat>
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <579355A36AEE9D4FA555C45D556003AB1B27E40E@servigilant.vigilant.local>,<563BCC92.7030402@posteo.de> <579355A36AEE9D4FA555C45D556003AB1B27F658@servigilant.vigilant.local> <563BEC40.20409@posteo.de>
Date: Fri, 6 Nov 2015 00:54:05 -0000
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Subject: Re: LF: Re: FR5ZX WSPR again
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Status: O

Hi Stefan yes it's interesting because there has be steady low level 
geomagnetic storms since the 3rd  at Kp=5. I am wondering if what we are 
seeing is more a feature of a predominantly N<>S path rather than the more 
usual long, predominantly E<>W paths to Joe and Alex. I suppose crossing the 
Equator there is much less effect from precipitated electrons which happens 
mainly at, or near, the poles.

An interesting way of analysing the 9000km path would be to cut it into 4 
hops and see where the ground interaction takes place. (it is roughly 2000 
to 2500km per hop) I do wonder if the desert (quartz) might have a similar 
effect to sea. (the desert sand was given as one reason why the "Poynting 
vector" aerials seemed to give good results in Egypt)

The signal doesnt really "bounce" if you draw the profile accurately it 
approached the ground at near zero degrees. I have a feeling that the long 
distance signal may be more affected by the ground "roughness" 
(scattering??) at mid-path than the resistivity/permiability. In fact most 
of the signal just skims the ground. There is no doubt the sea effect is 
certainly clear at the path ends.  There was some suggestion of preferential 
N<>S paths between ZL and Asia, but strangely it was never as good to 
W.Coast/Alaska  or Honalulu.

What is surprising is that there are not similar paths to South America from 
Europe. However the question is then " is anyone monitoring". Likewise to 
RSA but I believe LF is not popular with amateurs in ZS.

It will be interesting to see what happens when the CME arrives overnight on 
the 7th. It may not affect the path to La Reunion until the night of 7/8.

I noticed a set of regular 4min interval decodes then a 16 min blank which I 
presume must have been a fade. Also your best reception was soon after the 
fade I think??

Fascinating stuff this LF/MF propagation :-))

Alan
G3NYK


----- Original Message ----- 
From: "DK7FC" <selberdenken@posteo.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, November 05, 2015 11:54 PM
Subject: Re: LF: Re: FR5ZX WSPR again


> Attached is a picture showing the path for EA5DOM. So far i thought that
> the red sea is supporting the path for stations from DL, PA, SV and I,
> allowing one or 2 hops on sea water. But now Luis' path is directly over
> Africa.
> Hmmmm, Alan? Any thoughts? :-)
>
> 73, Stefan
>
> Am 05.11.2015 23:59, schrieb VIGILANT Luis Fernández:
>> Wops !!
>>
>>   2015-11-05 22:48 EA5DOM 0.475790 -20 0 IM98wn 0.05 FR5ZX LG78pu 8796
>>
>> New coil ! Antenna is finally on resonance  ..... and seems to work ! ;-)
>>
>> 73 de Luis
>> EA5DOM
>