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, NORMAL_HTTP_TO_IP,RCVD_IN_DNSWL_MED,SPF_PASS,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 v1ILAAup012457 for ; Sat, 18 Feb 2017 22:10:11 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cfCDT-0002VP-Aq for rs_out_1@blacksheep.org; Sat, 18 Feb 2017 21:06:51 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cfCDT-0002VG-1i for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 21:06:51 +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 4.87) (envelope-from ) id 1cfCDP-0006vT-US for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 21:06:49 +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: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=T8qCOA8bk4h9+GCnGFpQSgEOcKBPXk7C36ZPofNXxP8=; b=HS1mk3mWevih6qlNha+HjLpALS +kzcuZCnTrO1FA8OGpkNHXbkKDjwRNJCvKv9A5kwR9Cx8QlDcN7RLIEA5eV8zbhL6zYCcndR6TTZW PS8ry5zQ7rM8eUS5krhk3AzEWcaQlwg1NEEze2tt+67JeJFdoj/GHfEWZN6NGN33NLJg=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:37806 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 1cfCDP-0007Tv-Fa for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 21:06:47 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id C9F8F4008BA for ; Sat, 18 Feb 2017 21:06:46 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <15a523c6252-59e0-1118f@webprd-m14.mail.aol.com> <6c779546-7bb7-60fb-8782-7fd9e7662701@abelian.org> From: Paul Nicholson Message-ID: <13652dca-00b8-3d4c-8444-5a5fbb5507e5@abelian.org> Date: Sat, 18 Feb 2017 21:06:46 +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: 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: 66d07794ca19cd68f7d6cc289cd4ac18 Subject: Re: VLF: EbNaut also on 8270.033333 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: A X-Keywords: X-UID: 10634 Jacek wrote: > do you need any particular polarisation to couple > to the magnetosphere? The whistlers emerge more or less circular polarised. But unless you are under the duct exit they will be less circular and more linear. A recent whistler in the two opposite circular polarisations. http://abelian.org/vlf/tmp/170218a.png The top trace responds to signals rotating anti-clockwise as you look up towards the incoming signal. The lower trace responds to clockwise I had to go back a couple of days to find one that was fairly strongly polarised for this example. Most whistlers arriving here are coming from further east and are more linear. > now i do :) > and there is indeed a lot of whistlers I would be interested to compare the number of events you log with the whistler counts from Bielefeld. Eg in the event directory: ls 148745*.vt | wc -l (after 23:20 UT!) to compare with the same count from Bielefeld. Bielefeld on average has 2.7 whistlers for each whistler in the UK. I've often wondered if there are even more frequent whistlers further east. It's all a matter of where the lightning storms tend to happen. The storm is moving east, whistler count at Bielefeld is reducing. I expect the count will increase further east. The best 30 minutes of this afternoon's whistlers recorded on Wolf's receiver: http://78.46.38.217/vlf6.170218b.mp3 (24 Mbytes) -- Paul Nicholson --