Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vB7M0dTh002893 for ; Thu, 7 Dec 2017 23:00:41 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eN48e-0006r7-9o for rs_out_1@blacksheep.org; Thu, 07 Dec 2017 21:55:28 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eN48d-0006qt-Vb for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 21:55:27 +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 4.89) (envelope-from ) id 1eN48b-0004FO-79 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 21:55:26 +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:Cc:References:To:Subject:Sender:Reply-To: 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=HEWh10aumMV8ACMrWgz0ZWta3X4l3sZqFXa0p5PT2X0=; b=ZQI60ZBHg7YaWiX6lMlDdz4hj3 9Rpzh7orljlO2rzvvr1zUf3FXPx1ogdz4jTE2AWLnQhgZjwb2Ccqaskm/hM0AsPhIJ8ZQBiUAYHIU ttymOLo7kS4HFgdY1kXaHh4fou+utRcrZYNLreIgTI18w+QCAvYjZdfaQopoK3sMEpLc=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:44822 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eN48Z-0002Pc-NN; Thu, 07 Dec 2017 21:55:23 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 1261B400254; Thu, 7 Dec 2017 21:55:23 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A19FF75.7080801@posteo.de> <5A1FFE7C.9050703@posteo.de> <5A226B0C.3080701@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AAB0EB9@servigilant.vigilant.local> <5A25C304.3050607@posteo.de> <5A271218.9040803@posteo.de> <5A282BF9.4050409@posteo.de> <5A29193A.2090600@posteo.de> <5A29A373.6060406@posteo.de> <5A29AF93.9030908@posteo.de> Cc: Michael Smith From: Paul Nicholson Message-ID: <72b48a80-3b54-82b6-5330-98719fb2d5fd@abelian.org> Date: Thu, 7 Dec 2017 21:55:23 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <5A29AF93.9030908@posteo.de> Content-Language: en-US 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-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Stefan wrote: > I can change to CRC 12 but 08:08 UTC means that about the > last 90 minutes are running in daylight here. I notice from recent T/A west to east, W4DEX + VO1NA continue with good S/N well into daylight. Also we don't see good S/N before 23:00 or 00:00. The path seems to start late and finish late. Perhaps the same is true of east to west? We just don't know. This frequency, this path, this distance, all completely new and we have no carrier tests to guide us. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: Re: VLF: TA east to west? Content-Type: text/plain; charset=utf-8; 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 Stefan wrote: > I can change to CRC 12 but 08:08 UTC means that about the > last 90 minutes are running in daylight here. I notice from recent T/A west to east, W4DEX + VO1NA continue with good S/N well into daylight. Also we don't see good S/N before 23:00 or 00:00. The path seems to start late and finish late. Perhaps the same is true of east to west? We just don't know. This frequency, this path, this distance, all completely new and we have no carrier tests to guide us. > f = 17470.1000 Hz > Start time: 07.Dec.2017 21:30:00 UTC > Symbol period: 60 s > Characters: 1 > CRC bits: 10 > Coding 16K21A The transmission has started then. Reasonable settings and I hope the early start doesn't lose too much. We'll see. Markus wrote: > If you make the list long enough such that you always get > an output (right or false), wouldn't the chance for a false > positive not be 1 out of 52, or 1.9 %? Yes, the list should be long enough to always get an output (optimum list length setting). And you're right, 1 out of 52 is the chance of false positive in that case. My mistake, I must have been thinking of rank 0. -- Paul Nicholson --