Return-Path: X-Spam-DCC: paranoid 1233; 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=-1.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, NO_REAL_NAME 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 tB4KDB3m012664 for ; Fri, 4 Dec 2015 21:13:11 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a4wgF-0002PN-B4 for rs_out_1@blacksheep.org; Fri, 04 Dec 2015 20:10:11 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a4wgE-0002PE-UE for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:10:10 +0000 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1a4wfA-0001bK-PO for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:10:09 +0000 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by nina.ucs.mun.ca (8.13.1/8.13.1) with ESMTP id tB4K8l93023491 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 4 Dec 2015 16:38:47 -0330 Date: Fri, 4 Dec 2015 16:38:47 -0330 (NST) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: Message-ID: References: <8D2FC2AEF3A0D08-1488-1A0797@webmail-vd021.sysops.aol.com> <8D2FC914A8E0E4E-1038-20752A@webmail-vm010.sysops.aol.com> <56619CB7.4000501@abelian.org> <5661DD91.5070900@abelian.org> MIME-Version: 1.0 X-Scan-Signature: c9d6a1e47761f7ec7375ac340bef30d0 Subject: Re: LF: More EbNaut 137.777 4-5th Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5551 Missed the deadline on that one... Start time 2030 4K19A 0.2s 131 chars 10'56" message and unmodulated carrier in between messages for stations far away. The snow shovel and 28 cm awaits! 73 Joe On Fri, 4 Dec 2015, jcraig@mun.ca wrote: > Hi Markus and Paul, Group, > > Thank-you for the reports. I'll try 0.2 s symbols, 131 characters tonight > starting 2000. I's better get out and deal with the snow in the > drive before it gets too dark. > > 73 > Joe > > On Fri, 4 Dec 2015, Paul Nicholson wrote: > >> >> A plot of the daytime correlation of I/Q against the >> known encoded message >> >> http://abelian.org/vlf/tmp/151204a.gif >> >> shows significant spikes with each half-hour message, >> up to 14:00. Only the first two decoded: >> >> 08:30 Eb/N0 = 2.7 dB >> 09:00 Eb/N0 = 3.0 dB >> >> Judging from the size of the spikes the remaining daytime >> messages were all at least 6dB weaker, that's 3dB or more >> too weak to decode. >> >> My battery could be good for another night. No point >> in repeating the same tests. Maybe try to max out the >> capacity with 0.2 second symbols? Here I might get a 50% >> decode rate with that setting. >> >> Or go for some DX with long symbols if there are listeners >> further away? One hour messages perhaps instead of >> half-hour? So far all LF tests have been less than 30 minutes >> I think. One hour messages with an undisciplined oscillator >> will make the phase search have to work harder. >> >> -- >> Paul Nicholson >> -- >> >> > >