Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, SPF_PASS,T_DKIM_INVALID,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: wuwien: mailn 1290; 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+deb8u2) with ESMTP id v810E6NG016665 for ; Fri, 1 Sep 2017 02:14:08 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dnZWp-0007Aw-DI for rs_out_1@blacksheep.org; Fri, 01 Sep 2017 01:09:43 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dnZWR-0007An-10 for rsgb_lf_group@blacksheep.org; Fri, 01 Sep 2017 01:09:19 +0100 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 1dnZWM-0008C7-8d for rsgb_lf_group@blacksheep.org; Fri, 01 Sep 2017 01:09:16 +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: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=Jb9VCBStXeuETLML+1yHMfK/TEj92JJCrjFGkao9WY4=; b=JBLwirqTewfsLqXZhE9v7awirS oDOsICGPaQ0OVg8mnNgnxa6io/2dLbsWMMWiom0ZSGTD5n0jcYG0zGdIYeTkFRKfd/QDQmnJ4wPrL fQzUez9NuGn5BPNTJmoNSN2IjntHveP+pIEDcOv6GfxsEF5dDLwpB3hdr5DEZivouzQA=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:49339 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 1dnZWL-0007CS-Rt for rsgb_lf_group@blacksheep.org; Fri, 01 Sep 2017 01:09:13 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 3640A400069 for ; Fri, 1 Sep 2017 00:09:13 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <15e1104432f-c04-c80b@webjas-vac074.srv.aolmail.net> <599EB51C.1040204@posteo.de> <04e001d32294$b965d840$2c3188c0$@comcast.net> From: Paul Nicholson Message-ID: <7d87c2fd-9d70-2cca-cbe4-1dd6ecaf6689@abelian.org> Date: Fri, 1 Sep 2017 00:09:13 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <04e001d32294$b965d840$2c3188c0$@comcast.net> 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: b77892ad90d0261eaf071f4f6cf31464 Subject: Re: VLF: Carrier on 8270.00709 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: O X-Status: X-Keywords: X-UID: 12492 Jim wrote: > do these results meet your standard criteria for confirmation? Barely. There was some cheating at my end. Because the frequency is not known exactly I had to do some fiddling to add the two days. The fiddle was to rotate the phase to align the phases of the two 8270.00709 Hz bins before adding. This effectively treats the noise as if it were signal. This is why the coherent sum was 16 dB and the non-coherent was 9 dB. The trouble with this method is that, given enough days to stack, I can raise a peak on any bin by rotating the noise to add coherently in that bin. For comparison, here is what the 25th looks like by itself: http://abelian.org/vlf/tmp/170828b.gif I have received VO1NA before on this frequency, back in May: http://abelian.org/vlf/tmp/170508e.gif -- Paul Nicholson --