Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD,SPF_PASS 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 u3T9MCmi003471 for ; Fri, 29 Apr 2016 11:22:13 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aw4Zc-0007tJ-SM for rs_out_1@blacksheep.org; Fri, 29 Apr 2016 10:18:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aw4Zc-0007t9-KA for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 10:18:56 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1aw4Zb-0003TL-3k for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 10:18:55 +0100 Received: from pn.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 7747D3275A3 for ; Fri, 29 Apr 2016 10:17:43 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 16D4340000F for ; Fri, 29 Apr 2016 09:18:54 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <1546137dc25-12a6-35ed@webprd-a101.mail.aol.com> From: Paul Nicholson Message-ID: <572326FE.2040800@abelian.org> Date: Fri, 29 Apr 2016 09:18:54 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1546137dc25-12a6-35ed@webprd-a101.mail.aol.com> X-Scan-Signature: e90dcb17768c7e768f13e0721cc1c0c7 Subject: Re: VLF: EbNaut transmission on 8270.1 Hz again Content-Type: text/plain; charset=utf-8; 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 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7913 > Paul's SNR seems to be about 8 dB better then mine, despite > almost fivefold distance. The distance may actually be too short. For medium ranges, say 100km to 500km the phase and amplitude can vary wildly due to the number of competing modes (or rays if you prefer the ray model). When ray modeling I have to use over a dozen rays, sometimes 20 to get a realistic looking diurnal. > QRG 8270.1 Hz > 5 characters, 20 second symbols, 8K19A > Start 6:00:02, end 8:50:42 Copied 'HELLO' Eb/N0 = +0.4dB constant reference phase and carrier S/N: 15.02 dB in 97.7 uHz A good snowfall here this morning so a lot of static from the E-field antenna. -- Paul Nicholson --