Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x3BJmIYU026033 for ; Thu, 11 Apr 2019 21:48:19 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1hEfbc-00033H-Kw for rs_out_1@blacksheep.org; Thu, 11 Apr 2019 20:43:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1hEfbb-000338-S1 for rsgb_lf_group@blacksheep.org; Thu, 11 Apr 2019 20:43:27 +0100 Received: from lethe.lipkowski.org ([151.80.54.59] helo=lipkowski.org) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1hEfbZ-0000vv-II for rsgb_lf_group@blacksheep.org; Thu, 11 Apr 2019 20:43:26 +0100 Received: from mailn.lipkowski.org (localhost [127.0.0.1]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x3BJdnJY027184 for ; Thu, 11 Apr 2019 21:39:49 +0200 Received: from localhost (sq5bpf@localhost) by mailn.lipkowski.org (8.14.4/8.14.4/Submit) with ESMTP id x3BJdm1f027180 for ; Thu, 11 Apr 2019 21:39:48 +0200 X-Authentication-Warning: mailn.lipkowski.org: sq5bpf owned process doing -bs Date: Thu, 11 Apr 2019 21:39:48 +0200 (CEST) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: <5CAD944C.7050006@posteo.de> Message-ID: References: <1652663722.1033558.1554575549616.ref@mail.yahoo.com> <1652663722.1033558.1554575549616@mail.yahoo.com> <5CA90E98.2070707@posteo.de> <8c46744b-f60a-ca91-f60f-97a2f5f7b11f@abelian.org> <5CA931D4.6050908@posteo.de> <83eece37-ae11-b2fd-917c-ad29c350695b@abelian.org> <5CA9BD98.2030002@posteo.de> <5CAA1D1D.8070204@posteo.de> <5CABBF99.6010502@posteo.de> <5CAD944C.7050006@posteo.de> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.9 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.75 on 10.1.3.10 X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Stefan, I've tried to bruteforce the right filtering and noise blanking parameters. So after a few thousand tries i get: sq5bpf@jitter:/stuff2/sq5bpf/vlf_stefan2$ vtcat -p < stefan_2970_1 | vtfilter -a th=4 -h bp,f=2970,w=2200 > pliktmp6 Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: 33d261536bb1467bb13d5764461d5ec4 Subject: Re: ULF: EbNaut message transmitted from ground loop Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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 Stefan, I've tried to bruteforce the right filtering and noise blanking parameters. So after a few thousand tries i get: sq5bpf@jitter:/stuff2/sq5bpf/vlf_stefan2$ vtcat -p < stefan_2970_1 | vtfilter -a th=4 -h bp,f=2970,w=2200 > pliktmp6 sq5bpf@jitter:/stuff2/sq5bpf/vlf_stefan2$ vtblank -v -d0.0007 -a20 -t 50 < pliktmp6 | vtmult -f 2970.1 | vtresample -r 240 | vtresample -r 10 |vtraw -oa | ebnaut -dp16K21A -r10 -c2 -v -k16 -S6 -N7 -PS -L 50000 vtblank: selected channel: 1 = -:1 vtblank: channels: 1, sample_rate: 48000 vtblank: hfactor: 0.000e+00 vtblank: afactor: 20.000 initial reference phase -89.4 amplitude 7.496e-04 phase 0 0 0 0 0 vtblank: end of input vtblank: dropsum 0 64750004, nfp 359999999 vtblank: dropfactor 0 1.799e-01 found rank 14143 ber 4.2548e-01 Eb/N0 -2.5 M -2.143712342e-02 ph 0 0,0,0,0 [DK7FC/P] carrier phase: -10.6 deg carrier Eb/N0: -0.4 dB carrier Es/N0: -15.33 dB carrier S/N: 15.63 dB in 133.5 uHz, -23.11 dB in 1Hz, -57.09 dB in 2.5kHz elapsed 92 Hope you like it :) 7 chracters at 976km on ULF 2970.1Hz :) Article about it here: https://klubnl.pl/wpr/en/index.php/2019/04/11/ulf-2970hz-record/ BTW i will keep bruteforcing the rx parameters, maybe i will come up with a setting that gives even more S/N. This might be useful for your next tests. VY 73 Jacek / SQ5BPF