Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=3 Fuz1=3 Fuz2=3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v25BqQWS002629 for ; Sun, 5 Mar 2017 12:52:27 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ckUev-0000IR-In for rs_out_1@blacksheep.org; Sun, 05 Mar 2017 11:49:05 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ckUeu-0000II-U7 for rsgb_lf_group@blacksheep.org; Sun, 05 Mar 2017 11:49:04 +0000 Received: from omr-a017e.mx.aol.com ([204.29.186.68]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1ckUeo-0005HK-Qz for rsgb_lf_group@blacksheep.org; Sun, 05 Mar 2017 11:49:03 +0000 Received: from mtaomg-laa01.mx.aol.com (mtaomg-laa01.mx.aol.com [172.27.2.99]) by omr-a017e.mx.aol.com (Outbound Mail Relay) with ESMTP id AACA23800087 for ; Sun, 5 Mar 2017 06:48:56 -0500 (EST) Received: from core-acb01e.mail.aol.com (core-acb01.mail.aol.com [172.27.24.1]) by mtaomg-laa01.mx.aol.com (OMAG/Core Interface) with ESMTP id 49C2A38000081 for ; Sun, 5 Mar 2017 06:48:56 -0500 (EST) Received: from 188.192.95.60 by webprd-m71.mail.aol.com (10.74.55.19) with HTTP (WebMailUI); Sun, 05 Mar 2017 06:48:56 -0500 Date: Sun, 5 Mar 2017 06:48:56 -0500 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15a9e4d147c-44c1-e17c@webprd-m71.mail.aol.com> In-Reply-To: <6c779546-7bb7-60fb-8782-7fd9e7662701@abelian.org> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.95.60] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1488714536; bh=zwmSIhUlqUg/8Z+PJ5EaDeBFyuAGNVdkMsLnDixzU4Y=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=JT31VmerMrq1CTuP3cOIghwuatj3GKDSh+PJAT5HVGWwPnpbAu23T0QVP3TgXgGsR 2IYVpW/B1bPHWGlTQMpXO0zhT/A4srfWXdRVayO3Xn3W62fiMoscFoMac8i1WJs3d+ euBfnIJZZHTH+WSlZqFtooHnffq2qe8Q7qfUZjFs= x-aol-sid: 3039ac1b026358bbfb285b4c X-Scan-Signature: f64a6c8ea7591cecbecc6db95ffdd328 Subject: VLF: Whistler mode Content-Type: multipart/alternative; boundary="----=_Part_70439_1624319324.1488714536058" X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 10785 ------=_Part_70439_1624319324.1488714536058 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Former Siple station (Antarctica), producing triggered emissions and amplif= ied signals: http://vlf.stanford.edu/research/vlf-transmitter-siple-station-antarctica 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Paul Nicholson An: rsgb_lf_group Verschickt: Sa, 18. Feb 2017 18:36 Betreff: Re: VLF: EbNaut also on 8270.033333 Hz Yes, the whistlers are amplified in the magnetosphere by wave particle interaction. The whistler wave steals energy from electrons in the plasma, which then precipitate down onto the ionosphere. With careful monitoring of the phase of distant VLF transmitters (suitably located), these precipitations can be seen as a small rapid SID. Bielefeld is, as usual, well placed for the lightning storm off the southern tip of South Africa. Receivers a little further east may do very well too. I wonder if Jacek has vtevent running? -- Paul Nicholson -- Re: VLF: EbNaut also on 8270.033333 Hz=20 Von:Markus Vester An:rsgb_lf_group Datum:Sa, 18. Feb 2017 18:19 Thanks Wolf, there's indeed a beautiful Whistler festival going on! After h= aving read the post on the VLF Group, I had listened in Thursday night whic= h was already quite extraordinary, But right now the activity is even more = intense! And your vlf6 stream seems to be in a prime position. Are you feed= ing it from your wireless E-field antenna? Well, how much power would be needed for a narrowband Amateur signal to be = detected in Madagascar, what is the path loss? Think I've read somewhere th= at whistler propagation could possibly even be enhanced by stimulated emiss= ion, providing Maser-like amplification rather than attenuation. Thanks again to the contributors of these beautiful natural radio streams! All the best, Markus (DF6NM) ------=_Part_70439_1624319324.1488714536058 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Former Siple station (Antarctica), producing trigge= red emissions and amplified signals:

http://vlf.stanford.edu/researc= h/vlf-transmitter-siple-station-antarctica

73, Markus (DF6NM)
-----Urspr=C3=BCngliche Mitteilung-----
Von: Paul Nicholson <vlf040= 3@abelian.org>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>=
Verschickt: Sa, 18. Feb 2017 18:36
Betreff: Re: VLF: EbNaut also on = 8270.033333 Hz

Yes, the whistlers are amplified in the magnetosphere= by
wave particle interaction. The whistler wave steals energy
from = electrons in the plasma, which then precipitate down
onto the ionosphere= . With careful monitoring of the phase
of distant VLF transmitters (su= itably located), these
precipitations can be seen as a small rapid SID.<= br>
Bielefeld is, as usual, well placed for the lightning
storm off t= he southern tip of South Africa. Receivers
a little further east may do= very well too. I wonder if
Jacek has vtevent running?

--
Paul= Nicholson
--

Re: VLF: EbNaut also on 8270.033333 Hz=09=09=09=09=09
Von:Markus Vester <markusvester@aol.com>= ;
An:rsgb_lf_group <rsgb_= lf_group@blacksheep.org>
Datum:Sa, 18. Feb 2017 18:19

Thanks Wolf, there's ind= eed a beautiful Whistler festival going on! After having read the= post on the VLF Group, I had listened in Thursday night which was alr= eady quite extraordinary, But right now the activity is even more intense! = And your vlf6 stream seems to be in a prime position. Are you fee= ding it from your wireless E-field antenna?

Well, how much power wou= ld be needed for a narrowband Amateur signal to be detected in Madagascar, = what is the path loss? Think I've read somewhere that whistler propaga= tion could possibly even be enhanced by stimulated emission, providing Mase= r-like amplification rather than attenuation.

Thanks again to the co= ntributors of these beautiful natural radio streams!

All the best,Markus (DF6NM)
 
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