Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, SPF_PASS,SUBJ_ALL_CAPS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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+deb8u1) with ESMTP id v4AKMTNB005579 for ; Wed, 10 May 2017 22:22:30 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d8Y3P-0000Zw-3D for rs_out_1@blacksheep.org; Wed, 10 May 2017 21:17:47 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d8Y3M-0000Zn-US for rsgb_lf_group@blacksheep.org; Wed, 10 May 2017 21:17:44 +0100 Received: from omr-m006e.mx.aol.com ([204.29.186.6]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1d8Y3J-0002Ww-FP for rsgb_lf_group@blacksheep.org; Wed, 10 May 2017 21:17:43 +0100 Received: from mtaomg-mce01.mx.aol.com (mtaomg-mce01.mx.aol.com [172.29.27.207]) by omr-m006e.mx.aol.com (Outbound Mail Relay) with ESMTP id 3952F38000B5 for ; Wed, 10 May 2017 16:17:38 -0400 (EDT) Received: from core-acx03b.mail.aol.com (core-acx03.mail.aol.com [10.76.5.83]) by mtaomg-mce01.mx.aol.com (OMAG/Core Interface) with ESMTP id CB7E438000087 for ; Wed, 10 May 2017 16:17:37 -0400 (EDT) Received: from 188.192.95.60 by webprd-a30.mail.aol.com (10.72.52.207) with HTTP (WebMailUI); Wed, 10 May 2017 16:17:37 -0400 Date: Wed, 10 May 2017 16:17:37 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15bf402847a-1457-1ef6@webprd-a30.mail.aol.com> In-Reply-To: <049401d2c9c6$050077b0$0f016710$@comcast.net> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.95.60] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1494447458; bh=/DHuvznczfzOk+DaTpJTWk1zvjz8k9H0ujWIHzQdN+s=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=1ofoazziqf2D8BIaZHk6EK88d1EHIdsr0+KB9D+5Y0+tOBGxuudys7fXLYVsJo84B 4OBU8rJp+MPAmJn21d4VaiIG7CdB8VA4UDOBQZqMG6jrl1B8/f8pecA7TPkb92IHMR w7oeanOuP+0+01Wh3yKo0RZk66Z2M1bPtNHQFaAw= x-aol-sid: 3039ac1d1bcf591375616158 X-Scan-Signature: c8ff00257edaad8e124ab9389da9609a Subject: Re: LF: NA VLF Content-Type: multipart/alternative; boundary="----=_Part_9757_1266842153.1494447457398" 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: 11660 ------=_Part_9757_1266842153.1494447457398 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Think we've seen a few ppb upward shift on Joe's 137 kHz carrier in the mor= ning, with daylight progressing into the North Atlantic path. It seems plau= sible to assume that similar sized effects would occur on VLF frequencies. Best 73, Markus=20 -----Urspr=C3=BCngliche Mitteilung-----=20 Von: hvanesce An: rsgb_lf_group Verschickt: Mi, 10. Mai 2017 21:48 Betreff: RE: LF: NA VLF Joe mentioned: "Could part of this fluctuation be from propagation?" Joe and Paul, For your consideration and (with your permission) my edification have we seen natural-propagation-related frequency changes on this timescale?=20 The only generally acknowledged example of substantial propagation-related frequency changes (from all-natural processes) that I've seen is ~ 20mHz rm= s spreading of VLF signals during strong geomagnetic storms*, which might not even be a 50-second wander (too fast to show up at recent VO1NA signal integration times), but could even be simultaneous modulation at frequencie= s distributed over 20mHz rms (which also would not be visible given recent TA-signal integration times). Incidentally the magnetic field has been basically quiet during the TA tests.=20 So I'm asking Joe's question and adding a bit (driven by longstanding curiosity): does the experience base include examples of propagation-relate= d frequency changes (from all-natural processes) on this timescale?=20 * "Subionospheric VLF measurements..." (W. B. Peter, U. S. Inan - 2005) Thanks, Jim AA5BW=20 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of jcraig@mun.ca Sent: Wednesday, May 10, 2017 1:54 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: NA VLF Great news, Paul. The frequency is a bit enigmatic. It had always been a few ppb low since calibration in 2013 but is evidently bouncing above and below. Could part of this fluctuation be from propagation? The sigs will continue until the helix sparks or the wx grounds the aerial. TNX & 73 Joe VO1NA On Wed, 10 May 2017, Paul Nicholson wrote: > > A nice signal from VO1NA overnight 9th/10th. Happy to see the signal=20 > on the right frequency 8270.007093 Hz and back to 0.06 fT flux=20 > density. > > -- > Paul Nicholson > -- > > ------=_Part_9757_1266842153.1494447457398 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Think we've seen a few ppb upward shift on Joe's 13= 7 kHz carrier in the morning, with daylight progressing into the North= Atlantic path. It seems plausible to assume that similar sized effects wou= ld occur on VLF frequencies.

Best 73,
Markus 

-----Ur= spr=C3=BCngliche Mitteilung-----
Von: hvanesce <hvanesce@comcast.net= >
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschick= t: Mi, 10. Mai 2017 21:48
Betreff: RE: LF: NA VLF

Joe menti= oned:
"Could part of this fluctuation be from propagation?"

Joe a= nd Paul,

For your consideration and (with your permission) my edific= ation have we
seen natural-propagation-related frequency changes on this= timescale?
The only generally acknowledged example of substantial prop= agation-related
frequency changes (from all-natural processes) that I've= seen is ~ 20mHz rms
spreading of VLF signals during strong geomagnetic = storms*, which might not
even be a 50-second wander (too fast to show up= at recent VO1NA signal
integration times), but could even be simultaneo= us modulation at frequencies
distributed over 20mHz rms (which also woul= d not be visible given recent
TA-signal integration times). Incidentally= the magnetic field has been
basically quiet during the TA tests.
So I'm asking Joe's question and adding a bit (driven by longstanding
= curiosity): does the experience base include examples of propagation-relate= d
frequency changes (from all-natural processes) on this timescale? <= br>
* "Subionospheric VLF measurements..." (W. B. Peter, U. S. Inan - 20= 05)

Thanks,

Jim AA5BW



-----Original Messag= e-----
From: owner-rsgb_= lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of jcraig@mun.ca
Sent: Wednesday, May 10,= 2017 1:54 PM
To: rsgb_l= f_group@blacksheep.org
Subject: Re: LF: NA VLF

Great news, Pa= ul. The frequency is a bit enigmatic. It had always been a
few ppb low= since calibration in 2013 but is evidently bouncing above and
below. C= ould part of this fluctuation be from propagation?

The sigs will con= tinue until the helix sparks or the wx grounds the aerial.

TNX &= 73
Joe VO1NA

On Wed, 10 May 2017, Paul Nicholson wrote:

&= gt;
> A nice signal from VO1NA overnight 9th/10th. Happy to see the s= ignal
> on the right frequency 8270.007093 Hz and back to 0.06 fT fl= ux
> density.
>
> --
> Paul Nicholson
> -->
>


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