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 vB7IjqDh002241 for ; Thu, 7 Dec 2017 19:45:54 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eN15b-0004e8-KV for rs_out_1@blacksheep.org; Thu, 07 Dec 2017 18:40:07 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eN14X-0004ds-6T for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 18:39:01 +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 4.89) (envelope-from ) id 1eN14R-0002sZ-3m for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 18:38:57 +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:References:Cc:To:From:Subject:Sender:Reply-To: 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=dmVXFKWVkW9J6b3hCYMsm7+XEbOyHSmtBwHMzp4HiGg=; b=cqcuxVSepU30TT6UtEYbFgSXvH l93DXRRDsOKt74yYsqLhYOnrRTSgwmuTzIHrUQEmylTjgQdq4KN/yTntQL9L06aQHLOHtmHIDZC/Z KclrH9P31p5IEOFCJiXvZ3ZSYRdc99/hCsVeV0qexMrSik3le6oF06cI+3t/wfO/AbXc=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:43843 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 1eN14Q-0003Ge-HF; Thu, 07 Dec 2017 18:38:54 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 00ADD400254; Thu, 7 Dec 2017 18:38:53 +0000 (UTC) From: Paul Nicholson To: rsgb_lf_group@blacksheep.org Cc: Michael Smith References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A19FF75.7080801@posteo.de> <5A1FFE7C.9050703@posteo.de> <5A226B0C.3080701@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AAB0EB9@servigilant.vigilant.local> <5A25C304.3050607@posteo.de> <5A271218.9040803@posteo.de> <5A282BF9.4050409@posteo.de> <5A29193A.2090600@posteo.de> <00f101d36f83$8b02c5d0$a1085170$@comcast.net> <39d3d920-05d8-4172-f58a-4914f8f66bc1@abelian.org> Message-ID: <6e937a83-7603-fa2e-014e-8d52af427aa1@abelian.org> Date: Thu, 7 Dec 2017 18:38:53 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <39d3d920-05d8-4172-f58a-4914f8f66bc1@abelian.org> Content-Language: en-US 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-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: Jim AA5BW wrote: > I installed a receiver with GPSDO at a new lower-noise* permanent > location in Arlington, VA two days ago but it did not occur to me > that the new lower noise level might accommodate detection of > Stefan's 17470.1000 Hz signal. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: f38d515a9cad1e977fcfe251941a8120 Subject: Re: VLF: TA east to west? Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Jim AA5BW wrote: > I installed a receiver with GPSDO at a new lower-noise* permanent > location in Arlington, VA two days ago but it did not occur to me > that the new lower noise level might accommodate detection of > Stefan's 17470.1000 Hz signal. You may be lucky but it'll be hard to beat Mike's E-field receiver, it is probably the best in North America and is in a good location. It is very similar to my new E-field rx, AD823 based. > -38.55 dB in 1Hz would seem to suggest 6 dB in 8 hours using EbNaut, Correct, 6.05 dB in 34.7 uHz to be precise, and the 3 character message is 7.57 dB in 32.6 uHz. Neither is significant in themselves, but combined, we're looking at about 10dB which is starting to get interesting! Cross-correlation of EbNaut BPSK with the known message is equivalent in sensitivity to a carrier detection over the same duration. Let me know the exact lat/long of your Arlington rx Jim. If you can record the next transmission from Stefan I can run the cross-correlation here and we can compare S/N and phase. Here's Mike's (KE4RJQ) web page describing his set up http://www.unixnut.net/efield-current.html Location is 37.35348N,79.19450W and the recording runs on Linux. I'm able to log into Mike's VLF computer to extract raw signal. -- Paul Nicholson --