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Date: Wed, 10 Jan 2007 17:56:18 +0100
From: =?ISO-8859-1?Q?Jean-Pierre_M=E9r=E9?= <jpm.f1afj@online.fr>
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References: <45A4A564.3040002@online.fr> <002101c734aa$cc140fe0$6401a8c0@JAYTERMINAL> <45A4D4F4.4030906@w1tag.com> <007b01c734ca$ea77b3e0$0300a8c0@lark>
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Subject: Re: LF: Re: T/A  last night :onlly a few traces XES
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Hello Alan and all ,
Very beautiful explanation, thank you. If you look at the Capt_06=20
capture ( http://jpmere.online.fr/Temp/ ) one the increase of noise=20
between 03:30 and 05:30 sees very well (the lines of LORAN disappear! )=20
On the Plot_06 stud it is even more visible! Explanation of the scale in=20
dB: -5dB =3D average Noise of day; 0dB =3D average noise of night; the sc=
ale=20
is precise with a margin of 0.2 dB.
Jean-Pierre f1afj

Alan Melia a =E9crit :
> Hi John I did have static type interference here much worse that earlie=
r in
> the week. I have the characteristic vertical streaks.....the levels may=
 have
> been more continuous with Jean-Pierre. Extra-terrestrial noise would no=
t be
> able to penetrate the ionosphere, and there doesnt seem to be much auro=
ral
> activity at present. It could of course be "favourable fading", only in=
 this
> case favouring maybe eastern European noise source propagation. Signals=
 here
> were down but I only started captures about 0100z.
>
> There is a sign in Steve's plot, if you remove the 0700 peak, that leve=
ls
> were dropping steadily from about 0330z. This effect is confirmed by
> Laurence. I wonder if this just means that the Ring Current is not depl=
eted
> of electrons yet and is still exchanging them with the D-layer. The sto=
rm
> that started it all was cited as "severe" (Kp=3D8) and we have seen in
> previous years a storm of that magnitude delay propagation recovery by
> upwards of 28 days. What was a surprise was the relatively shallow dip =
in
> Dst it produced (only down to -160nT, when we could quite easily have
> expented -300nT) and then the very rapid initial "recovery".
>
> I do not have the expertise to pontificate on this but I am wondering
> whether, because there are several "orbits" in the Ring Current, these
> severe storms populate the outer (higher energy?) ones more heavily and
> these electrons take longer to decay to an energy where they can be
> precipitated. It is undoubtedly much more complex than that (it always =
is
> !!).....but it makes a good simple story !!
>
> Thanks to all for all the data and reports without which, it would be
> impossible to concoct these "off the wall" theories.....even if they ar=
e
> hopelessy incorrect it is great fun !
>
> Cheers de Alan G3NYK
> ----- Original Message -----
> From: John Andrews <w1tag@w1tag.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: 10 January 2007 11:58
> Subject: Re: LF: Re: T/A last night :onlly a few traces XES
>
>
>  =20
>> Jean-Pierre, Jay,
>>
>> XES did not go on the air until 0305 UTC last night. I am puzzled as t=
o
>> why conditions were so poor for both stations. It will be interesting =
to
>> see Hartmut's report.
>>
>> John Andrews
>>
>>
>>
>>
>>    =20
>
>
>
>
>  =20

--=20
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