Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: INFN-TO: mailn 1233; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v0S8J6s4028390 for ; Sat, 28 Jan 2017 09:19:07 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cXO6k-0004Cq-LZ for rs_out_1@blacksheep.org; Sat, 28 Jan 2017 08:11:38 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cXO6j-0004Ch-O6 for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2017 08:11:37 +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 ) id 1cXO6h-0005E4-7G for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2017 08:11:36 +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:References:To:Subject:Sender:Reply-To: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=cdpct1ByXabYA3E849XZoglMppiHtqDchY5YZz4Ilzw=; b=YTUhpr9FmMC+daKxWUFbsR5E// MbDZn65r3JtQJZWn3umf6gZ8jH3Ek7AY6K18RFylRJ/Wh6b3cS3+NxcDJ9JFHFS+8UEegO2GHgvyN 9tkilvT7YzvuA/Y+ajfNRPOclkhOUYNzfBiiKbZwH4ykMLH8MBIbSKzqDIdrO0hur9Dk=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:48811 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cXO6g-00021L-5R for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2017 08:11:34 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 68A96400521 for ; Sat, 28 Jan 2017 08:11:33 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <159a4661096-4946-10800@webprd-a16.mail.aol.com> From: Paul Nicholson Message-ID: <588C5235.30009@abelian.org> Date: Sat, 28 Jan 2017 08:11:33 +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: <159a4661096-4946-10800@webprd-a16.mail.aol.com> 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: 195b836cb7437e99aa05107459888659 Subject: Re: VLF: Back on 5.17 kHz / 58 km... 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 10364 Stefan wrote (12th Jan): > f = 5170.000000 Hz > Start time: 13.Jan.2017 08:00:00 UTC (daily repetition) > Symbol period: 6 s > Characters: 100 (!) > CRC bits: 8 > Coding 8K19A > Duration: 8h, 20m, 48s > Antenna current: ~ 225 mA Decoded via DL4YHF at Bielefeld (303.8 km): 'VERY LONG MESSAGES CAN BE SENT BY RADIO AMATEURS ON VLF USING EBNAUT SOFTWARE. 73 DE DK7FC IN JN49IK' Each day: 2017-01-13 -7.9 dB 138.6 deg S/N -59.1 dB 2017-01-14 -4.5 dB 136.0 deg S/N -55.7 dB 2017-01-15 -28.4 dB N/A S/N -79.6 dB 2017-01-16 -8.0 dB 138.7 deg S/N -59.2 dB 2017-01-17 -6.4 dB 144.9 deg S/N -57.6 dB 2017-01-18 -7.1 dB 146.1 deg S/N -58.3 dB 5 days stacked (excluding 15th): Decoded with 0.2 dB 140.3 deg S/N -51.0 dB Some combinations of 4 days also decode at -0.4 dB. At Todmorden (881.2km): 2017-01-13 -11.1 dB 44.5 deg S/N -62.2 dB 2017-01-14 -12.1 dB 35.3 deg S/N -63.3 dB 2017-01-15 -37.0 dB N/A S/N -88.2 dB 2017-01-16 -14.0 dB 22.3 deg S/N -65.2 dB 2017-01-17 -13.5 dB 26.6 deg S/N -64.7 dB 2017-01-18 -14.0 dB 41.6 deg S/N -65.2 dB 5 days stacked (excluding 15th): -4.8 dB 36.7 deg S/N -56.0 dB Would probably need altogether at least 20 days to get enough signal to decode at Todmorden. > The todays [15th] transmission failed again for some reason > :-( No idea what the reason could be. > It stopped 15:46 UTC, about 3/4 hours to early. From the S/N it looks like it had more effect, perhaps the phase went wrong earlier in the transmission before it stopped. -- Paul Nicholson --