Return-Path: <owner-rsgb_lf_group@blacksheep.org> 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: INFN-TO: mailn 1233; 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 v07JUtBs012601 for <sq5bpf@lipkowski.org>; Sat, 7 Jan 2017 20:30:57 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cPwcb-0001Gh-8m for rs_out_1@blacksheep.org; Sat, 07 Jan 2017 19:25:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cPwcD-0001GY-Su for rsgb_lf_group@blacksheep.org; Sat, 07 Jan 2017 19:25:22 +0000 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 4.87) (envelope-from <vlf0403@abelian.org>) id 1cPwcB-0005bp-B7 for rsgb_lf_group@blacksheep.org; Sat, 07 Jan 2017 19:25:20 +0000 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=/zVuADaITCXvoPJwJWIuWr3zE7d7U9qKiVlAztLsup0=; b=wv9oqikMKVeaHwIQVVqaDQH6+T u3jpwiAMCvzOalPbn9Tps6y9UaGruhs0vw26wnTSVrugUrpGzU/3+RYY6ahBlrTvxD0+hSNqPb/lf PJHks/B+iM0Rf9yOcf8d3lYEx8BePrA7FN01ZhYAcE6eWpt0tdFSTR1hqm7i6iICjYcA=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:50313 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <vlf0403@abelian.org>) id 1cPwc9-0002RD-MM for rsgb_lf_group@blacksheep.org; Sat, 07 Jan 2017 19:25:17 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id E7696400A5A for <rsgb_lf_group@blacksheep.org>; Sat, 7 Jan 2017 19:25:14 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <159526aa32e-1297-2d056@webprd-m96.mail.aol.com> <5867AA75.6030603@posteo.de> <5867DFA9.5020604@abelian.org> <58691D84.9030201@posteo.de> <586A8A05.5090901@posteo.de> <586AA7C5.8070802@abelian.org> <049501d26535$dee8b370$9cba1a50$@comcast.net> <586B5BAD.7@abelian.org> <586C4F2C.1010205@posteo.de> <586D6E99.6080509@posteo.de> <586F5D60.4030309@abelian.org> <586F7C4F.3090806@posteo.de> <586F8082.4060404@abelian.org> <5870097B.7080708@posteo.de> <58701056.20008@posteo.de> <587069F3.1010407@abelian.org> <58712E8D.9050207@posteo.de> From: Paul Nicholson <vlf0403@abelian.org> Message-ID: <5871409A.7020206@abelian.org> Date: Sat, 7 Jan 2017 19:25:14 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <58712E8D.9050207@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: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: Re: VLF: Back on 5.17 kHz / 58 km... 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: 10136 > With your given RAM, how many characters can you decode in 16K25A? 20 chars uses 42Gbyte RAM. 25 chars is about the limit on my workstation unless I turn off a few things. But more is no problem, I simply spot request a suitable machine on AWS. The largest available has 1952 Gbyte RAM and 128 cores, I'm just waiting for an excuse to give that one a try!! 950 chars would use all that RAM but the sender program wont do such a large block. > And how long does the decode process take then? Only a few minutes (lots of cores) because messages usually decode quite early in the phase search. > The carrier on 5170.001250 Hz is still on the air and will > run until 18 UTC. Thanks that will be useful. I'm glad you've discovered the signal calculator, takes out some of the guesswork. Your chosen settings look good. 4270 will be interesting. These various bands on VLF are about as different from one another as the HF bands are! Still don't know why 2970 isn't working. My ERP calculations are more pessimistic than yours but still predict enough ERP to detect here. Jacek's timing system (vlfrx-tools) is working very well. Meanwhile, I'm working on an interesting enhancement to EbNaut... -- Paul Nicholson --