Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u2NL5BOv008335 for <sq5bpf@lipkowski.org>; Wed, 23 Mar 2016 22:05:11 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aipoD-0004bA-13 for rs_out_1@blacksheep.org; Wed, 23 Mar 2016 20:55:17 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aipo5-0004b1-L5 for rsgb_lf_group@blacksheep.org; Wed, 23 Mar 2016 20:55:09 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from <vlf0403@abelian.org>) id 1aipo3-0000sf-95 for rsgb_lf_group@blacksheep.org; Wed, 23 Mar 2016 20:55:08 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 92B133273E4 for <rsgb_lf_group@blacksheep.org>; Wed, 23 Mar 2016 20:54:46 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id E53FA28A062B for <rsgb_lf_group@blacksheep.org>; Wed, 23 Mar 2016 20:55:05 +0000 (UTC) Message-ID: <56F302A9.3000706@abelian.org> Date: Wed, 23 Mar 2016 20:55:05 +0000 From: Paul Nicholson <vlf0403@abelian.org> User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <15399669ea9-51b7-6dd2@webprd-a74.mail.aol.com> In-Reply-To: <15399669ea9-51b7-6dd2@webprd-a74.mail.aol.com> X-Scan-Signature: 1e15d6d6179985f133b43d42d658878a Subject: Re: VLF: EbNaut 8270.1, Sunday Mar 20 Content-Type: text/plain; charset=ISO-8859-1; 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7462 I wrote: > The phase doesn't look very steady Markus. Markus wrote: > maybe the explanation is that with 10 minute averages my > signal is just too close to the noise. You're right. I confirmed this by injecting an artificial carrier into the VLF recording at 8271.0025 at the same average strength as your signal, then running this signal through the same process. The result looks very similar. Periods when your signal had crazy phase, so does the artificial signal. The standard deviation of the phase is a little better on the artificial signal: 37 degrees compared with 51 degrees, but that's to be expected since your signal won't have an exact constant phase and amplitude. Below is your signal in 30 minute measurements (555uHz) stepping 15 minutes 2016-03-20_12:00:00 0.10 fT -75.5 deg 2016-03-20_12:15:00 0.07 fT -79.4 deg 2016-03-20_12:30:00 0.07 fT -77.6 deg 2016-03-20_12:45:00 0.12 fT -93.5 deg 2016-03-20_13:00:00 0.10 fT -87.1 deg 2016-03-20_13:15:00 0.10 fT -80.5 deg 2016-03-20_13:30:00 0.12 fT -68.8 deg 2016-03-20_13:45:00 0.08 fT -93.5 deg 2016-03-20_14:00:00 0.08 fT -119.0 deg 2016-03-20_14:15:00 0.11 fT -81.1 deg 2016-03-20_14:30:00 0.14 fT -65.5 deg 2016-03-20_14:45:00 0.15 fT -66.1 deg 2016-03-20_15:00:00 0.11 fT -75.4 deg 2016-03-20_15:15:00 0.02 fT -121.4 deg 2016-03-20_15:30:00 0.07 fT -124.3 deg 2016-03-20_15:45:00 0.13 fT -91.9 deg 2016-03-20_16:00:00 0.13 fT -89.2 deg 2016-03-20_16:15:00 0.13 fT -113.7 deg 2016-03-20_16:30:00 0.10 fT -113.8 deg 2016-03-20_16:45:00 0.08 fT -106.3 deg 2016-03-20_17:00:00 0.09 fT -95.2 deg 2016-03-20_17:15:00 0.13 fT -94.4 deg 2016-03-20_17:30:00 0.09 fT -124.8 deg Average -90.2 degrees, sigma 17.8 degrees and the artificial signal has sigma 16.3 degrees at this setting. One hour integration, 30 minute stepping 2016-03-20_10:30:00 0.09 fT -81.9 deg 2016-03-20_11:00:00 0.12 fT -78.4 deg 2016-03-20_11:30:00 0.11 fT -76.7 deg 2016-03-20_12:00:00 0.09 fT -75.9 deg 2016-03-20_12:30:00 0.08 fT -83.2 deg 2016-03-20_13:00:00 0.11 fT -76.9 deg 2016-03-20_13:30:00 0.09 fT -88.0 deg 2016-03-20_14:00:00 0.10 fT -83.7 deg 2016-03-20_14:30:00 0.13 fT -70.1 deg 2016-03-20_15:00:00 0.08 fT -93.6 deg 2016-03-20_15:30:00 0.10 fT -101.9 deg 2016-03-20_16:00:00 0.11 fT -99.8 deg 2016-03-20_16:30:00 0.09 fT -104.9 deg 2016-03-20_17:00:00 0.09 fT -109.5 deg 14 degree sigma. -- Paul Nicholson --