Message-ID: <009701c4f319$3a34fe60$fe79a8c0@PCVONWALTER>
From: "Walter Staubach" <walter.staubach@fen-net.de>
To: rsgb_lf_group@blacksheep.org
Date: Wed, 5 Jan 2005 12:17:24 +0100
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Subject: LF: Re: Re: RE: Re: DI2AG 440KHz...rapid fading
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Dear Alan,
        thanks for your interesting information. Great! So let us see what
Jean-Louis with his excellent equipment and others will report the next
days. And thanks for your help.
73   Walter

-----Ursprüngliche Nachricht-----
Von: Alan Melia <Alan.Melia@btinternet.com>
An: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Datum: Dienstag, 4. Januar 2005 18:19
Betreff: LF: Re: RE: Re: DI2AG 440KHz...rapid fading


>Hi Jean-Louis, and Walter. I see a rapid almost cyclical fading on some
>136kHz signals immediately after a geomagnetic storm (we have had several
>minor storms Kp=5 recently), the period usually lengthens on successive
>nights. I have suggested that this might be due to the plasma cloud
>"slapping" the ionosphere on one side and it then "ringing" like a wobbly
>jelly ( I must have eaten too much this Christmas !!) This would cause the
>"reflection" level to move up and down a few hundreds of metres maybe even
a
>kilometre, which is quite sufficient to swing through a 180degree phase
>change. The movement required for a "null" at 440kHz is much less than at
>136kHz. I would certainly be interested to see if the period of the fades
>increases over the course of the next few nights.
>
>Cheers de Alan G3NYK
>alan.melia(at)btinternet.com
>
>----- Original Message -----
>From: <Jean-Louis.RAULT@fr.thalesgroup.com>
>To: <rsgb_lf_group@blacksheep.org>
>Sent: 04 January 2005 13:48
>Subject: LF: RE: Re: DI2AG 440KHz
>
>
>> Walter et al.
>>
>> I recorded your DI2AG sigs last night from 6 PM to 6 AM .
>> A quick exam on the 150 ARGO snapshots during my tea time early this
>morning  tend to show a deep  QSB (period around 1 minute).
>> Have you got other similar remarks ?
>>
>> 73
>>
>> Jean-Louis F6AGR
>> Loc. JN18DQ, near Paris
>
>
>