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: : mailn 1480; 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 v06Bblus006256 for ; Fri, 6 Jan 2017 12:37:49 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cPSlz-0006Ob-4u for rs_out_1@blacksheep.org; Fri, 06 Jan 2017 11:33:27 +0000 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cPSly-0006OS-Lk for rsgb_lf_group@blacksheep.org; Fri, 06 Jan 2017 11:33:26 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay2.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cPSlv-0004Zp-KZ for rsgb_lf_group@blacksheep.org; Fri, 06 Jan 2017 11:33:25 +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=QY1FXtCzaYto3FL1V48VcSbXctCiePttXMkdYwFKDjU=; b=hwGYqNC59qfKRqDFRzc0YgniYQ 2oNL1EMehPpNpyuTdOr4AnE348NvGA4ZXfkMqNxMV/SKXHV88kqGESD+KupUmngZ9rHLWVVi0zbcF Z9xIdRGCluQGRNXCxSJe7By6hCRNwL/ynYSoeSHwWUXG6cI1ei8f6qmEr6sRK1M8S0Uw=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:44432 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 1cPSlv-0006TA-29 for rsgb_lf_group@blacksheep.org; Fri, 06 Jan 2017 11:33:23 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 76446400115 for ; Fri, 6 Jan 2017 11:33:22 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <159526aa32e-1297-2d056@webprd-m96.mail.aol.com> <5867AA75.6030603@posteo.de> <5867DFA9.5020604@abelian.org> <58691D84.9030201@posteo.de> <586A8A05.5090901@posteo.de> <586AA7C5.8070802@abelian.org> <049501d26535$dee8b370$9cba1a50$@comcast.net> <586B5BAD.7@abelian.org> <586C4F2C.1010205@posteo.de> <586D6E99.6080509@posteo.de> <586F5D60.4030309@abelian.org> <586F7C4F.3090806@posteo.de> From: Paul Nicholson Message-ID: <586F8082.4060404@abelian.org> Date: Fri, 6 Jan 2017 11:33:22 +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: <586F7C4F.3090806@posteo.de> 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: fc152e7304849b9a177649b85aea9f41 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: 10122 Stefan wrote: > f = 5170.000000 Hz > Start time: 04.Jan.2017 08:00:00 UTC > Symbol length: 60 s > Characters: 8 > CRC 16 > Coding 16K25A > I will repeat the transmission starting [5th] 8 UTC... Best decode with reference phase pattern: 30 30 0 0 Eb/N0 = +3.6 dB, BER 35.0%, list rank 0. S/N 20.24 dB in 11.8 uHz, -63.0dB in 2.5kHz The phase pattern is appropriate for an advance of the signal phase during day relative to night. Symbol error map (with 30 30 0 0 pattern): http://abelian.org/vlf/tmp/170106a.png and with constant reference (0 0 0 0 pattern) http://abelian.org/vlf/tmp/170106b.png Not much difference, 500/1408 symbol errors with constant reference. Down to 493/1408 with 30 30 0 0 pattern. I haven't mentioned the message text because it's possible someone else may be trying a decode. > that makes a fine record of 5.17 kHz successes > between the two of you! Indeed, 5170Hz seems to be quite a cooperative band to use. -- Paul Nicholson --