Return-Path: X-Spam-DCC: paranoid 1181; 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=-1.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_30_40,HTML_MESSAGE,MIME_HTML_ONLY,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 tB3CinXx007054 for ; Thu, 3 Dec 2015 13:44:49 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a4T9x-0005Iu-TE for rs_out_1@blacksheep.org; Thu, 03 Dec 2015 12:38:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a4T9x-0005Il-KX for rsgb_lf_group@blacksheep.org; Thu, 03 Dec 2015 12:38:53 +0000 Received: from smtp-out01.xworks.net ([31.25.48.13]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1a4T8s-0003Nl-Hz for rsgb_lf_group@blacksheep.org; Thu, 03 Dec 2015 12:38:52 +0000 Received: from mailbackend1 (cluster06.xworks.net [10.100.1.80]) by smtp-out01.xworks.net (Postfix) with ESMTP id 0DFBF61565 for ; Thu, 3 Dec 2015 13:37:31 +0100 (CET) X-DKIM-Result: Domain=kabelmail.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kabelmail.de; s=mail; t=1449146251; bh=YUnw8gUJrmzLtSiG1leOS+2iSsYBjx6KasOzg+/P4fA=; h=In-Reply-To:From:To:Date:Subject:MIME-Version:Content-type; b=TtvqrHRG0iERwb5ysX/4uesUWfgSCRBjfzDOIxg4YusweL+M81vPKhz1ruc1UIOFq PovWSpwkoYpT3TOw4BoWeqo/TLnzL19CV14d51rTbRsiW2jsirzzWzawki+nS1kDYM kAHyPV7b/E4EMKiE1OiiiN5Tvi9wX/qqytkSIIv8= In-Reply-To: <565E1DDA.7020100@abelian.org> From: uwe-jannsen@kabelmail.de To: rsgb_lf_group@blacksheep.org Message-ID: Date: Thu, 03 Dec 2015 13:37:29 +0100 X-Priority: 3 MIME-Version: 1.0 X-Scan-Signature: 086f3faad0220c9ae57a7913e711a86d Subject: AW: Re: AW: LF: 8270 Hz traces again! AK Content-type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: 5517

hope the transmission can stay 24 hours = a day on the air soon=2E
so your analysis may show less phase destru= ctions at night hours=2E
Uwe/dj8wx

Von: Paul Nicholson <vlf0403@abelian=2Eorg>= ;
Gesend= et: 01=2E12=2E2015 23:27
An: <rsgb_lf_group@blacksheep=2Eorg>
= Betreff: Re: AW: LF: 8270 Hz traces again! AK

Uwe wrote:
> transmission CL because of heavy rain

Got a good carr= ier from you

http://abelian=2Eorg/vlf/fbins=2Eshtml#p=3D1448996400&b=3D090&= s=3Dsp

and this decoded easily in EbNaut using 10 second sym= bols,
eg 8K19A 2 characters,

found rank 7: ** ps [ 2 30 30 30= 30]
re-encode 140/368 ber 3=2E80e-01 Es/N0=3D-13=2E3 Eb/N0=3D1=2E6<= br>
Carrier decodes as a series of '*' characters which is handy
= for testing=2E Using the carrier I can try a range of message
length= s and symbol periods=2E

Using about an hour of carrier from 17:0= 0 I got

8K19A, 8 seconds, 3 chars: Eb/N0=3D-0=2E2
16K21A, 4 s= econds, 3 chars: Eb/N0=3D1=2E0
8K23A, 7 seconds, 4 chars: no decode<= br>
I grabbed 3 hours of carrier, 15:00 to 18:00 and played aroundwith that but couldn't get a decode from it=2E It's a bad time
of = day due to the terminator passage, the phase goes all over
the place= so I'm not too surprised=2E

Tested the carrier 15:00 to 16:00 a= nd got

8K23A, 7 seconds, 4 chars: -0=2E8 dB (BER 38=2E9% rank 67= 9)
16K21A, 3=2E4 seconds, 5 chars: -0=2E7 dB (BER 41=2E4% rank 3200)=

I couldn't get anything from the 90 minutes 15:00 to 16:30=2E
--
Paul Nicholson
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