Return-Path: Received: (qmail 25499 invoked from network); 27 Mar 2003 10:06:55 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 27 Mar 2003 10:06:55 -0000 Received: (qmail 26363 invoked from network); 27 Mar 2003 10:06:56 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 27 Mar 2003 10:06:56 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 18yUGI-0004HB-GR for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Mar 2003 10:05:30 +0000 Received: from [194.73.73.176] (helo=protactinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 18yUGD-0004H2-JM for rsgb_lf_group@blacksheep.org; Thu, 27 Mar 2003 10:05:25 +0000 Received: from host213-122-76-93.in-addr.btopenworld.com ([213.122.76.93] helo=Main) by protactinium.btinternet.com with smtp (Exim 3.22 #24) id 18yUGC-00018P-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Mar 2003 10:05:24 +0000 Message-ID: <000001c2f448$5ab18040$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Thu, 27 Mar 2003 09:53:12 -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: Propagation Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.0 required=5.0tests=noneversion=2.51 X-Spam-Checker-Version: SpamAssassin 2.51 (1.174.2.5-2003-03-20-exp) 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: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Hi all, as judged by Steve's plots of DCF39 conditions are still slowly improving. Last nights plot shows good periods at medium levels, with some deep troughs. The peak levels are 15dB higher than the levels a couple of weeks back, but are still nearly 10dB short of the early January highs. The geomagnetic storm just after mid-night (Kp=5) was the one predicted by NOAA and Spaceweather and due to a "geoeffective" coronal hole. The problem for Lawrence is that the effect of this would be almost instantaneous on polar paths whereas it will take another two to three days to depress the lower latitude paths (DCF39 > W3EEE). The end effect at lower latitudes should be to drag out the recovery period. We must remember that there was a period of nearly a month of low Kp's before the January "highs". From memory I think the previous geomag storm was around the 28th Nov. Unfortunately todays storm will start to depress night-time paths again in time for the weekend GM "expeditions". Hopefully it will be accompanied by better day-time propagation as a slight consolation. Cheers de Alan G3NYK alan.melia@btinternet.com