Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1481; 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 uA2KSoZX025759 for <sq5bpf@lipkowski.org>; Wed, 2 Nov 2016 21:28:50 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1c226W-0003aN-4B for rs_out_1@blacksheep.org; Wed, 02 Nov 2016 20:25:48 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1c226V-0003aE-NW for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 20:25:47 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <vlf0403@abelian.org>) id 1c226S-0001ka-28 for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 20:25:46 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:To:References:Reply-To:Subject:Sender:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=nX9EPqkafmEPwm0QuyJ1Q1iEaVjs8NrNUZ7duacFGBg=; b=kDxmJNMeuLAQW7kcus+h1E7zMX yVMW6jIWc8FerpZXO4+gG8Y0rQHQOdQgXLtf02FhM117KNpk82AXR20k8ejBekUYQ7gc1OVEQC0oq 1yWPBkYbhZwBFeieDLse6V8e+1XN0hLbGW0Dgjy2ccCPrDuK+63vG+C0atAfr+qUgtCk=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:55120 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <vlf0403@abelian.org>) id 1c226R-0004Mc-Gj for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 20:25:43 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id DB6CA400008 for <rsgb_lf_group@blacksheep.org>; Wed, 2 Nov 2016 20:25:42 +0000 (UTC) References: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <573CAF79.9040701@abelian.org> <573CBBF0.4030701@posteo.de> <573E5907.6020107@posteo.de> <573EA094.3040205@abelian.org> <573EF90F.1080201@posteo.de> <573FC4DA.3080107@abelian.org> <5740842D.3030000@posteo.de> <5744FA27.6010703@posteo.de> <57F56531.3060205@posteo.de> <5817DE39.9010506@posteo.de> <5818DDAB.7000804@abelian.org> <5819E3AA.3020906@posteo.de> <581A452F.6060506@abelian.org> To: rsgb_lf_group@blacksheep.org From: Paul Nicholson <vlf0403@abelian.org> Message-ID: <581A4BC6.9030106@abelian.org> Date: Wed, 2 Nov 2016 20:25:42 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <581A452F.6060506@abelian.org> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 0a4643e586472c13187d293ec5d096c2 Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz 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: 9357 Even more aggressive sferic blanking raises the decode to Eb/N0 +1.7 dB BER 38.2% S/N 16.10 dB in 25.4 uHz. Using around 50% of the channel capacity. The carrier S/N is about 1.6 dB weaker than expected for that Eb/N0. > Would you think a 11 character message will decode? Yes, with the same signal and noise, it would decode at about +0.8 dB... if the terminator doesn't mess things up. > Can you provide a bit error image (you know what i mean) http://abelian.org/vlf/tmp/161102a.gif There are 1312 transmitted symbols, 30 seconds each. Each red line indicates a symbol received in error, there are 502 of these. -- Paul Nicholson --