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: : mailn 1480; Body=3 Fuz1=3 Fuz2=3 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 v2QKnVrh012586 for ; Sun, 26 Mar 2017 22:49:32 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1csEyP-0007Sb-Lk for rs_out_1@blacksheep.org; Sun, 26 Mar 2017 21:41:13 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1csEyO-0007SS-PJ for rsgb_lf_group@blacksheep.org; Sun, 26 Mar 2017 21:41:12 +0100 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-ECDSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1csEyL-0007Xp-KU for rsgb_lf_group@blacksheep.org; Sun, 26 Mar 2017 21:41:11 +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:MIME-Version:Date: Message-ID:To:Subject:From:Sender:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=mtlGmQcWKMEoWCN/G6Xi/3Gx+8aVz6/Gl8/HV+2SjSc=; b=ckgAQ+uktQxhrAvc7ug9QQdjYN a0+RinDrAmJ4MFBbAiJeyNg9fIDtMi8bBWHHJI4zh3XerFErIfJp/Ez8cjqjGRaQRLSYckceFhhEs 0+cXLA55yeTPe892G4n6n+u6P1OCValFwH4kE2r8J6Lje21bsSFoXT645qI2ZKZZVd7E=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:42483 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.88) (envelope-from ) id 1csEyJ-00038S-4l for rsgb_lf_group@blacksheep.org; Sun, 26 Mar 2017 21:41:07 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 3AECE400043 for ; Sun, 26 Mar 2017 20:41:06 +0000 (UTC) From: Paul Nicholson To: rsgb_lf_group@blacksheep.org Message-ID: <93ae1c86-9b2e-8313-069f-8b0d941b49c8@abelian.org> Date: Sun, 26 Mar 2017 20:41:06 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 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: LF: DK7FC in Todmorden at 2970 Hz 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: 11020 Stefan wrote (10th March): > Since 16:56 UTC i'm running 180 mA antenna current > on (2970 + 7/(24*3600)) Hz, i.e. on 2970.000081 Hz After coherently stacking 13:00 to 00:00 for 9 days in a bandwidth of 25.25 uHz I get a clear signal at significance of around 5 sigma: http://abelian.org/vlf/tmp/170326a.png The peak has S/N 14.0 dB in 25.25uHz, which is -66 dB in 2.5kHz bandwidth. Signal azimuth is east with the expected phase angle between E and H antennas. The days used were 11th to 16th plus 18th to 20th. Attempting to include the 17th, or 21st to 23rd reduced the S/N. Leaving out any of the nine stacks days also reduces the S/N. The amplitude of each daily contribution is normalised by the average power in a 20Hz bandwidth around the signal frequency. No other bandwidth or daily time range produces a stronger peak. 14:00 to 19:00 in 55.5 uHz gives about 12dB S/N. So far, no attempt has been made to compensate for night time phase delay. Distance is 881.2 km, approximately 8.7 wavelengths. -- Paul Nicholson --