Return-Path: X-Spam-DCC: paranoid 1481; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id uA5Atn3J002624 for ; Sat, 5 Nov 2016 11:55:49 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1c2yZj-0002EL-1b for rs_out_1@blacksheep.org; Sat, 05 Nov 2016 10:51:51 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1c2yZi-0002EC-I2 for rsgb_lf_group@blacksheep.org; Sat, 05 Nov 2016 10:51:50 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1c2yZg-0001Th-3B for rsgb_lf_group@blacksheep.org; Sat, 05 Nov 2016 10:51:49 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 1406320A36 for ; Sat, 5 Nov 2016 11:51:45 +0100 (CET) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3t9wW50LzPz106F for ; Sat, 5 Nov 2016 11:51:44 +0100 (CET) Message-ID: <581DB9C0.10602@posteo.de> Date: Sat, 05 Nov 2016 11:51:44 +0100 From: DK7FC 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: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <573CAF79.9040701@abelian.org> <573CBBF0.4030701@posteo.de> <573E5907.6020107@posteo.de> <573EA094.3040205@abelian.org> <573EF90F.1080201@posteo.de> <573FC4DA.3080107@abelian.org> <5740842D.3030000@posteo.de> <5744FA27.6010703@posteo.de> <57F56531.3060205@posteo.de> <5817DE39.9010506@posteo.de> <5818DDAB.7000804@abelian.org> <5819E3AA.3020906@posteo.de> <581A452F.6060506@abelian.org> <581A4BC6.9030106@abelian.org> <581A541E.9050406@abelian.org> <581A8098.8050909@posteo.de> <581C3027.8050003@abelian.org> <581C8660.1070709@posteo.de> <581C90C7.5030809@abelian.org> <581C95BC.6010602@posteo.de> <581DA8E4.5010701@abelian.org> In-Reply-To: <581DA8E4.5010701@abelian.org> X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 9399 A second transmission is running now but it is a rainy day so the antenna current is a bit lower. Same message, symbol length, phase orientation and start time as on 03.Oct.2016. 73, Stefan Am 05.11.2016 10:39, schrieb Paul Nicholson: > > Tried to decode *** messages from the overnight carrier Oct > 10th/11th 18:00 to 06:00 and the best result was 2 chars 50 > second symbols 16K25A with 18 bit CRC at +1.0 dB, BER 42.8%, > constant reference phase. > > It was an averagely noisy night. > > Looks like we'll have to use daytime signal and combine > multiple days. Probably a method we will need for 2970 Hz. > > > A message is sent several times and the sequences are > > added until a decode appears. > > If added coherently. Or send with longer symbols, splitting > the sending across multiple days. > > Well I can test those two methods here with simulated signal and > noise. > > -- > Paul Nicholson > -- >