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 w09HVtfR027420 for ; Tue, 9 Jan 2018 18:31:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eYxev-0007hy-PV for rs_out_1@blacksheep.org; Tue, 09 Jan 2018 17:25:57 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eYxev-0007hp-DI for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 17:25:57 +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 1eYxes-0006Mj-Lp for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 17:25:56 +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:References:Reply-To:To:From:Subject:Sender: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=sGJP5mMhvJ3LZWntpgJf+NQlivi+22PighhsdTMb6Uo=; b=4V414AV3TCIv4aWj/EH8irAmgu jIuEki84Y0SSEEtB8mfAYd2gLrOBkOyg631Szjt/yjP9d2KqfbCiE+n0WBpeMsvuQ4xTFlaPMsWkC INIjjhnJWYO+msfeTu49nyV2xh1QVGSuAur9HhoT7fryc9wS2lZPCrwXYGx9UgmsmRAg=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:40833 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1eYxes-0005qU-6w for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 17:25:54 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 9B2754004BA for ; Tue, 9 Jan 2018 17:25:53 +0000 (UTC) From: Paul Nicholson To: rsgb_lf_group@blacksheep.org References: <160d0cc9190-1720-7a399@webjas-vaa200.srv.aolmail.net> <5A54E3EC.30107@posteo.de> Message-ID: <9fb65a40-484e-2a16-152e-36428d110b79@abelian.org> Date: Tue, 9 Jan 2018 17:25:53 +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: 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: It is good to know the frequency to within 1uHz for VLF amateur radio. A 1uHz error amounts to a 30 degree phase error after one day, enough to significantly affect the stacking of repeats. Fortunately this is quite easy to achieve with GPS timing. [...] 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: 3f8d74a8c70dd416d0a3a1dbcb9bb89f Subject: Re: LF: EbNaut at 8270.01953125 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=1.1 required=5.0 tests=FROM_ENDS_IN_NUMS, SUBJ_HAS_UNIQ_ID 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 It is good to know the frequency to within 1uHz for VLF amateur radio. A 1uHz error amounts to a 30 degree phase error after one day, enough to significantly affect the stacking of repeats. Fortunately this is quite easy to achieve with GPS timing. Riccardo IW4DXW wrote: > QRG: 8270.01953125 > 3 chars > 60 sec/sym. > coding 16K21A > CRC 8 > duration: 12h 16' > start time 18:30 UTC Todmorden (1412.5 km) --------------------- 05/06 Eb/N0 +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded* 06/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase 99.3 *Decoded* 07/08 Eb/N0 +7.7 dB, H-field only, phase 178.4 *Decoded* 08/09 Eb/N0 +5.6 dB, S/N -62.5 dB/1Hz, phase 176.2 *Decoded* Bielefeld (845.3 km) -------------------- 05/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase -30.8; 06/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded* 07/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase -66.4 *Decoded* 08/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase -72.8; Cumiana (370.5 km) ------------------ 05/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4; 06/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded* 07/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase 20.5; 08/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0; Warsaw (1035.0 km) ------------------ 05/06 Eb/N0 -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3; 06/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz; 07/08 Eb/N0 -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2; 08/09 No data from rx site, uplink off; -- Paul Nicholson --