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=2 Fuz1=2 Fuz2=2 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 v15MZAg3028251 for ; Sun, 5 Feb 2017 23:35:11 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1caVKg-0007xW-68 for rs_out_1@blacksheep.org; Sun, 05 Feb 2017 22:30:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1caVKY-0007xN-8u for rsgb_lf_group@blacksheep.org; Sun, 05 Feb 2017 22:30:46 +0000 Received: from omr-a006e.mx.aol.com ([204.29.186.55]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1caVKV-0002Ec-Bk for rsgb_lf_group@blacksheep.org; Sun, 05 Feb 2017 22:30:45 +0000 Received: from mtaomg-mad02.mx.aol.com (mtaomg-mad02.mx.aol.com [172.26.221.208]) by omr-a006e.mx.aol.com (Outbound Mail Relay) with ESMTP id 251CE3800097 for ; Sun, 5 Feb 2017 17:30:41 -0500 (EST) Received: from core-acx05a.mail.aol.com (core-acx05.mail.aol.com [10.76.14.46]) by mtaomg-mad02.mx.aol.com (OMAG/Core Interface) with ESMTP id D829538000083 for ; Sun, 5 Feb 2017 17:30:40 -0500 (EST) Received: from 188.192.95.60 by webprd-a53.mail.aol.com (10.72.57.68) with HTTP (WebMailUI); Sun, 05 Feb 2017 17:30:40 -0500 Date: Sun, 5 Feb 2017 17:30:40 -0500 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15a10668d0b-1a2e-a32b@webprd-a53.mail.aol.com> In-Reply-To: <15a0d9cf39d-3281-8f71@webprd-a05.mail.aol.com> 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=1486333841; bh=IPoVOohiJHBrcY0BWqe5C5cMHOgN7DbOfxbutzcg9J8=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=EpP0JgOUHVS7nJBowPCY+aL/M3rRggwbcrc8cbI1KkCqggkEm2bEZlZGe0AM9PNUB 6mQQh1NbpIyL6At/24tsfejRMze8GIko1zytZqLzeXcdmnvi2ZLne/2AEltQSkdMTD jOk43+lW+xCyWawSszcdQtTUm9I/uAXkbIRf9b/I= x-aol-sid: 3039ac1addd05897a790373b X-Scan-Signature: b1e5ebccbad86c8ca1fd46d24f0285de Subject: Re: VLF: 8270.0025 Hz Sunday - VLF MIMO? Content-Type: multipart/alternative; boundary="----=_Part_52027_570760957.1486333840649" 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: 10496 ------=_Part_52027_570760957.1486333840649 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable The carrier was on air without interruption until 22:00 UT. It's a peasure = to see the Uwe's and my traces side by side on Paul's compass-spectrogram, = and also on the tree in Heidelberg since Stefan connected his other loop. T= hanks also to Tom DK1IS for sharing a 30 mHz spectrogram from the Perseus r= eceiver at DL0AO (48 km). Thinking more about crossed loops, I'm wondering if we could try to demonst= rate MIMO (multiple input multiple output) co-channel transmissions? If Ste= fan connected both loops to the Raspi stereo soundcard, Uwe and I could sim= ultaneously send two different EbNaut messages on the same frequency, which= could then be decoded independently. Paul could probably do the same, alth= ough our angular separation would be smaller in Todmorden. Or maybe with St= efan transmitting as well, three MIMO channels might still separable with t= he help of Paul's E-field antenna? Another strategy could be to decode the = strongest signal, reconstruct it's waveform and subtract it before proceedi= ng to the next weaker one. Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: So, 5. Feb 2017 10:31 Betreff: VLF: 8270.0025 Hz Sunday Carrier from Nuremberg on air since 9:25 UT: 8270.0025 Hz, 0.35 A, ~ 10 uW.= Reports & grabbers appreciated! All the best, Markus (DF6NM) ------=_Part_52027_570760957.1486333840649 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
The carrier was on air without interruption until&n= bsp;22:00 UT. It's a peasure to see the Uwe's and my traces side by side on= Paul's compass-spectrogram, and also on the tree in Heidelberg since = Stefan connected his other loop. Thanks also to Tom DK1IS for sharing = a 30 mHz spectrogram from the Perseus receiver at DL0AO (48 km).<= br>
Thinking more about crossed loops, I'm wondering if we could try to = demonstrate MIMO (multiple input multiple output) co-channel transmissions?=  If Stefan connected both loops to the Raspi stere= o soundcard, Uwe and I could simultaneously send two different EbNaut messa= ges on the same frequency, which could then be decoded independen= tly. Paul could probably do the same, although our angular separation = would be smaller in Todmorden. Or maybe with Stefan transmitting as we= ll, three MIMO channels might still separable with the help = of Paul's E-field antenna? Another strategy could be to decode the stronges= t signal, reconstruct it's waveform and subtract it before proceeding = to the next weaker one.

Best 73,
Markus (DF6NM)


-----U= rspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <markusvester@a= ol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Ver= schickt: So, 5. Feb 2017 10:31
Betreff: VLF: 8270.0025 Hz Sunday

=
Carrier from Nuremberg on air si= nce 9:25 UT: 8270.0025 Hz, 0.35 A, ~ 10 uW. Reports & grabbers apprecia= ted!

All the best,
Markus (DF6NM)
------=_Part_52027_570760957.1486333840649--