Delivered-To: daveyxm@virginmedia.com Received: by 10.50.203.68 with SMTP id ko4csp24525igc; Wed, 23 Apr 2014 08:27:29 -0700 (PDT) X-Received: by 10.194.103.36 with SMTP id ft4mr2196024wjb.66.1398266848077; Wed, 23 Apr 2014 08:27:28 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id l3si748840wjb.109.2014.04.23.08.27.27 for ; Wed, 23 Apr 2014 08:27:28 -0700 (PDT) Received-SPF: none (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WcyeF-0000Ik-JF for rs_out_1@blacksheep.org; Wed, 23 Apr 2014 15:59:43 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WcyeF-0000Ib-17 for rsgb_lf_group@blacksheep.org; Wed, 23 Apr 2014 15:59:43 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1WcyeD-0000XR-8t for rsgb_lf_group@blacksheep.org; Wed, 23 Apr 2014 15:59:41 +0100 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 8F44D327408 for ; Wed, 23 Apr 2014 15:57:10 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 67A1B28A0EB7 for ; Wed, 23 Apr 2014 14:59:38 +0000 (UTC) Message-ID: <5357D559.9000302@abelian.org> Date: Wed, 23 Apr 2014 14:59:37 +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: <8D12C3598A2B083-2270-417C5@webmail-va028.sysops.aol.com> In-Reply-To: <8D12C3598A2B083-2270-417C5@webmail-va028.sysops.aol.com> X-Spam-Score: 0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Juggling the phase of the E-field and subtracting from the H-field to max the long path signal, then doing some cross-correlation with the much stronger short path signal, then subtracting an auto-correlation of the short path signal, gives [...] Content analysis details: (0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [217.72.171.49 listed in list.dnswl.org] 0.7 SPF_NEUTRAL SPF: sender does not match SPF record (neutral) X-Scan-Signature: 4ead635eadbaebfaa92cfec77deb715d Subject: Re: VLF: Different E and H ripples on NWC Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 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 Juggling the phase of the E-field and subtracting from the H-field to max the long path signal, then doing some cross-correlation with the much stronger short path signal, then subtracting an auto-correlation of the short path signal, gives http://abelian.org/vlf/tmp/nwc140423a.png The peak at a delay of about 42.2 mS agrees quite well with the path difference of 12708.9 km ( 26369.52 km - 13660.62 km). 12708.9 / 300e3 = 42.36 mS The MSK signal isn't ideal for this sort of thing, given its strong and broad auto-correlation sidebands. -- Paul Nicholson --