Delivered-To: daveyxm@virginmedia.com Received: by 10.50.237.98 with SMTP id vb2csp136948igc; Mon, 10 Mar 2014 15:09:37 -0700 (PDT) X-Received: by 10.204.168.206 with SMTP id v14mr1836813bky.26.1394489375999; Mon, 10 Mar 2014 15:09:35 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id ma9si8369352bkb.208.2014.03.10.15.09.35 for ; Mon, 10 Mar 2014 15:09:35 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WN8MN-0002AD-LR for rs_out_1@blacksheep.org; Mon, 10 Mar 2014 22:07:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WN8MN-0002A4-1L for rsgb_lf_group@blacksheep.org; Mon, 10 Mar 2014 22:07:47 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1WN8ML-0007yq-4D for rsgb_lf_group@blacksheep.org; Mon, 10 Mar 2014 22:07:45 +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 DFAC03273F9 for ; Mon, 10 Mar 2014 22:06:12 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id E2D9428A0B55 for ; Mon, 10 Mar 2014 22:07:43 +0000 (UTC) Message-ID: <531E37AF.9030802@abelian.org> Date: Mon, 10 Mar 2014 22:07:43 +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: <2FC5CAB271A6437CB35A5B100185CEDA@White> <025101cf3a52$e0925750$a1b705f0$@comcast.net> <7DB9DD5669FC4C648838510DCAC08AFB@White> <531A506E.9040103@abelian.org> <531A5C19.9060209@abelian.org> <02ba01cf3aa3$debaad50$9c3007f0$@comcast.net> <531AF126.2060600@abelian.org> <850A470A5B9F4483BED8B49D4791044A@White>,<531B1D0C.3070208@abelian.org> ,<531B4E01.7000304@abelian.org> <039f01cf3b72$bfa1db80$3ee59280$@comcast.net> <76F90E9771CA44F3981F679241E1A005@White> <03ca01cf3b92$eea24670$cbe6d350$@comcast.net> <531C64DA.5050102@abelian.org> <03e101cf3b98$3a61cef0$af256cd0$@comcast.n et> <531CC48C.9090408@abelian.org> <047901cf3bee$0fc64120$2f52c360$@comcast.net> <049201cf3c39$500d3900$f027ab00$@comcast.net> In-Reply-To: <049201cf3c39$500d3900$f027ab00$@comcast.net> 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: A better signal last night from WH2XBA/1 and I was able to go back to using 10 minute averages to improve time resolution http://abelian.org/vlf/tmp/29499_140310a.gif 120 deg phase change as usual but taking till 04:00 to complete. S/N here was good between 04:00 and 08:00 thanks to background subsiding. [...] 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: f38d515a9cad1e977fcfe251941a8120 Subject: Re: LF: Daytime 29.499 kHz 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 A better signal last night from WH2XBA/1 and I was able to go back to using 10 minute averages to improve time resolution http://abelian.org/vlf/tmp/29499_140310a.gif 120 deg phase change as usual but taking till 04:00 to complete. S/N here was good between 04:00 and 08:00 thanks to background subsiding. Now four days comparison with NAA http://abelian.org/vlf/tmp/29499_140310b.gif The first 3 nights were opera but last night was carrier until 04:00 and carrier would be sqrt(2) times stronger than opera. Yes it is possible for winter day maximum to exceed that of summer on certain paths. There is no simple rule to say which path. For example DHO at 23.4kHz to Todmorden (646 km) http://abelian.org/vlf/tmp/dho_2013a.png http://abelian.org/vlf/tmp/dho_2012a.png Propagation is complicated at short range because there are many modes (or combinations of rays with different number of hops if you visualise things that way) contributing to the total signal. When calculating signals by ray tracing it is usually necessary to include paths with up to 12 or 15 hops at least, in order to get a model that resembles a real diurnal. -- Paul Nicholson --