Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x25LN12c030965 for ; Tue, 5 Mar 2019 22:23:02 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1h1HKw-00022a-R6 for rs_out_1@blacksheep.org; Tue, 05 Mar 2019 21:10:55 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1h1HFM-000222-D4 for rsgb_lf_group@blacksheep.org; Tue, 05 Mar 2019 21:05:08 +0000 Received: from lethe.lipkowski.org ([151.80.54.59] helo=lipkowski.org) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1h1HFB-0003bg-Fg for rsgb_lf_group@blacksheep.org; Tue, 05 Mar 2019 21:04:57 +0000 Received: from mailn.lipkowski.org (localhost [127.0.0.1]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x25L3A1W008005 for ; Tue, 5 Mar 2019 22:03:11 +0100 Received: from localhost (sq5bpf@localhost) by mailn.lipkowski.org (8.14.4/8.14.4/Submit) with ESMTP id x25L39J7008001 for ; Tue, 5 Mar 2019 22:03:09 +0100 X-Authentication-Warning: mailn.lipkowski.org: sq5bpf owned process doing -bs Date: Tue, 5 Mar 2019 22:03:09 +0100 (CET) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org Subject: Re: ELF: Almost touching the ground... | 12.47 Hz In-Reply-To: <5C7EC39A.5070903@posteo.de> Message-ID: References: <5C7AD93E.8010402@posteo.de> <5C7CEF81.5080302@posteo.de> <000201d4d2ce$4aa091c0$dfe1b540$@go2.pl> <5C7EC39A.5070903@posteo.de> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Score-sq5bpf: -2.9 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.75 on 10.1.3.10 X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Stefan, did you try contacting any geophysisists in your area? Maybe they have an ULF receiver, and could give you access to the data jacek On Tue, 5 Mar 2019, DK7FC wrote: Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: 5c335215f1b3de26d890ee84d49616ce X-SA-Exim-Scanned: No; SA Timed out after 180 secs 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 Stefan, did you try contacting any geophysisists in your area? Maybe they have an ULF receiver, and could give you access to the data jacek On Tue, 5 Mar 2019, DK7FC wrote: > Date: Tue, 05 Mar 2019 19:44:42 +0100 > From: DK7FC > Reply-To: rsgb_lf_group@blacksheep.org > To: rsgb_lf_group@blacksheep.org > Subject: ELF: Almost touching the ground... | 12.47 Hz > > Hi ELF friends, > > During the last 2 weeks i've done another experiment on ELF, this time on > 12.47 Hz, the 24 Mm band (wavelength 24057 km). Again i've crossed the local > distance of 3.5 km. That's the lowest frequency i've ever been and it feels > like i can see the ground already :-) > The dimensions of everything down there are extreme. I've integrated 227 > hours of a carrier transmission into one spectrum peak, it is shown in the > attachment in 1.25 uHz. This carrier could have transferred an EbNaut message > of nearly 100 characters. > > The ERP was 50 attowatt or -163 dBW and the antenna current was 170 uA only, > despite about 5 kV antenna voltage. > > I'm now trying to put a step below 10 Hz but the RX antenna becomes less > efficient with each Hz. > > 73, Stefan >