Return-Path: X-Spam-DCC: paranoid 1102; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,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 u54H1gYE028093 for ; Sat, 4 Jun 2016 19:01:43 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b9EtC-00016n-2p for rs_out_1@blacksheep.org; Sat, 04 Jun 2016 17:57:34 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b9EtB-00016e-LZ for rsgb_lf_group@blacksheep.org; Sat, 04 Jun 2016 17:57:33 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1b9Et9-0000bW-VT for rsgb_lf_group@blacksheep.org; Sat, 04 Jun 2016 17:57:32 +0100 Received: from pn.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id D4F4E327592 for ; Sat, 4 Jun 2016 17:55:29 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 954A2400148 for ; Sat, 4 Jun 2016 16:57:30 +0000 (UTC) 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> <574AF1CA.7080702@posteo.de> <57512B49.2080305@abelian.org> <57514ED7.5080904@posteo.de> From: Paul Nicholson Message-ID: <5753087A.3030501@abelian.org> Date: Sat, 4 Jun 2016 16:57:30 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <57514ED7.5080904@posteo.de> X-Scan-Signature: 5c335215f1b3de26d890ee84d49616ce 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: 8220 Stefan wrote: > Message 22.05.2016: 'cqcq dk7fc in jn49ik' 18.22 dB in 4.06 uHz, http://abelian.org/vlf/tmp/160604a.gif which gives Eb/N0 = -2.35 dB on the 20 char message > Message 25.05.2016: 'not very easy' 16.24 dB in 7.97 uHz, http://abelian.org/vlf/tmp/160604b.gif and Eb/N0 = -2.46 dB. Seems we are close with both messages, just needs another dB to have a chance of decoding and another 2dB would make decode very likely. These must be amongst the narrowest bandwidth detections anyone has used. The day/night phase shift doesn't seem to be causing us any problem. But, I wonder if I could gain another dB by adjusting for a nominal diurnal. I can use these recordings to try that. -- Paul Nicholson --