Delivered-To: daveyxm@virginmedia.com Received: by 10.67.23.138 with SMTP id ia10csp244282pad; Thu, 3 Oct 2013 11:44:04 -0700 (PDT) X-Received: by 10.194.119.132 with SMTP id ku4mr3209632wjb.51.1380825843689; Thu, 03 Oct 2013 11:44:03 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id gf6si3592677wjb.76.1969.12.31.16.00.00; Thu, 03 Oct 2013 11:44:03 -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 1VRnQZ-0004I6-JS for rs_out_1@blacksheep.org; Thu, 03 Oct 2013 19:15:07 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VRnQZ-0004Hx-2k for rsgb_lf_group@blacksheep.org; Thu, 03 Oct 2013 19:15:07 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VRnQX-0002qJ-Ih for rsgb_lf_group@blacksheep.org; Thu, 03 Oct 2013 19:15:05 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id r93IF3dr022144 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 3 Oct 2013 20:15:05 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id r93IF2Bg012487 for ; Thu, 3 Oct 2013 20:15:02 +0200 Message-ID: <524DB421.3060300@iup.uni-heidelberg.de> Date: Thu, 03 Oct 2013 20:14:57 +0200 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <524B5E48.1000405@gmail.com> <524BEE8D.4030304@iup.uni-heidelberg.de> <524C5EB3.70202@kpnmail.nl> <8A01731CFF0049D9A62144188999A393@gnat> <524DAB81.6050600@iup.uni-heidelberg.de> In-Reply-To: X-Spam-Score: -1.4 (-) 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: Hi Roelof, Thanks, most interesting! And, last night the local (2000 km range) MF propagation was excellent, really a difference. We were isolated from far QRN due to the bad DX propagation :-) 73, Stefan [...] Content analysis details: (-1.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [129.206.100.212 listed in list.dnswl.org] -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: LF: No TA on MF :-( Content-Type: text/plain; charset=ISO-8859-15; 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=0.0 required=5.0 tests=none 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 Status: O X-Status: X-Keywords: X-UID: 2479 Hi Roelof, Thanks, most interesting! And, last night the local (2000 km range) MF propagation was excellent, really a difference. We were isolated from far QRN due to the bad DX propagation :-) 73, Stefan Am 03.10.2013 20:00, schrieb Roelof Bakker: > Hello Stefan, > > I study propagation of Canadian NDB's in the range 200 - 520 kHz by > means of a PERSEUS spectrum recoding from 200 - 600 kHz. This > recording runs every night. > > The Kyoto Dst has been well above zero for the last couple of weeks > and peaked at 41 on 03:00 UTC on October 2. > It than made a steep dive and bottomed up at just below -40 at 11:00 UTC. > > It was found that propagation from Canada ceased completely over the > 200 - 500 kHz frequency range, starting at 03:00 UTC on October 2. > This is way before the Dst passed the critical level of -20 which has > been found before. > I gather that the speed of the change is related to the sudden drop out. > > It was if someone had pulled a switch! > > 73, > Roelof, pa0rdt