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: EATSERVER: mailn 1166; 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 v4584ssD017834 for ; Fri, 5 May 2017 10:04:55 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d6Y6Z-0006fO-U9 for rs_out_1@blacksheep.org; Fri, 05 May 2017 08:56:47 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d6Y6Y-0006fF-Nv for rsgb_lf_group@blacksheep.org; Fri, 05 May 2017 08:56:46 +0100 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d6Y6U-0008RM-9y for rsgb_lf_group@blacksheep.org; Fri, 05 May 2017 08:56:45 +0100 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=2cbfZb/aKIYAzAFsce/SLqMqutqVw27NKDFf2kBeCqw=; b=ZDqzrgtle6bYwWl7xMA6wAWisr jCnKzSod7uHurA2Bmb+7y4SSQwcJQrSKoE7Zf2xEEfUKxGo5vxPnEhhcbc0VDO8xzg8V1aI2NzGtG q3y0BA4LKr4GZJm7hwMIcX1rsErYEhXoVTVuwIkZLYNEVEKl8tNLbrUazg6RDXU1Lrpw=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:53493 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d6Y6Q-0005av-Mm for rsgb_lf_group@blacksheep.org; Fri, 05 May 2017 08:56:38 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 03565400052 for ; Fri, 5 May 2017 07:56:38 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <15bd53dda31-14f8-1cb1c@webprd-m59.mail.aol.com> <590B9892.9010406@posteo.de> From: Paul Nicholson Message-ID: Date: Fri, 5 May 2017 07:56:37 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <590B9892.9010406@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: f38d515a9cad1e977fcfe251941a8120 Subject: Re: VLF: tonite on the 36km band... 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: 11594 Stefan reported a problem with setting message length in the v0.7 decoder. Now the version is 0.7a which fixes this problem: http://abelian.org/ebnaut/software_ms.shtml Stefan wrote: Probably that's a transmission for Paul only: > f = 8270.100000 Hz > Start time: 05.May.2017 05:30:00 UTC > Symbol period: 10 s > Characters: 100 > CRC bits: 0 > Coding 8K19A Needs about 5 Gbyte RAM to decode when using list length of one million, about 7 Gbyte for two million. It's likely that using the 8K19A instead of the stronger 16K21A will work better for some given available RAM, because the small loss of coding gain in the convolutional code can be more than made up by the use of a longer list. An interesting 'feature' of longer messages is that a false decode is often only partly false - you may find most of the message is correct but there is a garbled section. -- Paul Nicholson --