Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00,FORGED_RCVD_HELO, RATWARE_GECKO_BUILD autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id sBGGQJtr020534 for ; Tue, 16 Dec 2014 17:26:19 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Y0uqg-0007Di-GT for rs_out_1@blacksheep.org; Tue, 16 Dec 2014 16:19:46 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Y0uqg-0007DZ-8a for rsgb_lf_group@blacksheep.org; Tue, 16 Dec 2014 16:19:46 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.84) (envelope-from ) id 1Y0uqd-0005D8-LJ for rsgb_lf_group@blacksheep.org; Tue, 16 Dec 2014 16:19:45 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id E63193273E1 for ; Tue, 16 Dec 2014 16:18:46 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 8A79528A0220 for ; Tue, 16 Dec 2014 16:19:41 +0000 (UTC) Message-ID: <54905B9D.8000400@abelian.org> Date: Tue, 16 Dec 2014 16:19:41 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <548FC502.6000409@abelian.org> In-Reply-To: <548FC502.6000409@abelian.org> X-Scan-Signature: 2e2f7cbbe9f38dd7bf3fac4fc012e6fc Subject: Re: VLF: W4DEX to DL4YHF at 8822 Hz Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 1509 Spectrogram of W4DEX at Forest, VA (Mike Smith KE4RJQ) showing a very strong signal at range 254km, http://abelian.org/vlf/tmp/141216b.png I played around with gnuplot to make this fancy 3D spectrogram at a wider bandwidth which reveals some short period fluctuation of the amplitude http://abelian.org/vlf/tmp/141216c.png In Todmorden, Dex was his usual signal strength on the loop rx http://abelian.org/vlf/tmp/141216d.gif giving an average 15.8dB S/N from 00:00 to 04:00. Only a faint trace of the signal at Cumiana last night. Best I can get is 8.6dB S/N on a 5 hour average and that doesn't stand out on a spectrum and certainly isn't significant against the noise. -- Paul Nicholson --