Return-Path: Received: (qmail 4489 invoked from network); 19 Jan 2004 15:32:59 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 19 Jan 2004 15:32:59 -0000 Received: (qmail 790 invoked from network); 19 Jan 2004 15:32:59 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 19 Jan 2004 15:32:57 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1AibOb-00005k-RO for dave@picks.force9.co.uk; Mon, 19 Jan 2004 15:32:57 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AibOL-0005EI-It for rs_out@blacksheep.org; Mon, 19 Jan 2004 15:32:41 +0000 Received: from [194.73.73.147] (helo=einsteinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AibOJ-0005E9-0m for rsgb_lf_group@blacksheep.org; Mon, 19 Jan 2004 15:32:39 +0000 Received: from [213.122.89.105] (helo=Main) by einsteinium.btinternet.com with smtp (Exim 3.22 #25) id 1AibOI-0004Bw-00 for rsgb_lf_group@blacksheep.org; Mon, 19 Jan 2004 15:32:38 +0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <000a01c3dea1$7a180000$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <001301c3de7a$dade8b60$fe79a8c0@PCVONWALTER> <4010040925.20040119114525@dx.ru> Date: Mon, 19 Jan 2004 15:32:03 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: RU6LA acty Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 ----- Original Message ----- From: "Ed Lesnichy" To: Sent: 19 January 2004 11:45 Subject: LF: RU6LA acty > Dear LF-enthusiasts! > Some conclusions from last acty: the propagation was very unstable on > a distance up to 3000km at the night but for me there was by a surprise > a very good and stable propagation to daytime (Jan 18) Hi Ed, I guess I was a bit too optimistic. The geomagnetic condition continued to be unsettled (Kp=4) and precipitate electrons into the D-layer. The result was to "top-up" a "reflecting" daytime layer at about 50kms, giving enhanced daytime propagation, but at night, persistant ionisation gave absorption, limiting levels but with fairly short period deep fading. I have a plot from Brian from the 17th that displays this. The daytime enhancement between DCF39 and CT1 was 10dB higher than average at 1200z. Brian's daytime signal from DCF39 is by skywave and on average is some 20dB above the groundwave signal at about mid-day. It normally needs a major geomag storm in the summer to give enhancement of of 10dB on top of this in daytime. Thanks for your efforts Regards de Alan G3NYK alan..melia@btinternet.com