Return-Path: Received: (qmail 3394 invoked from network); 27 May 2001 20:26:35 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 May 2001 20:26:35 -0000 Received: (qmail 22613 invoked from network); 27 May 2001 20:26:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 May 2001 20:26:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15470K-0001dC-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 27 May 2001 21:19:12 +0100 Received: from imo-r04.mx.aol.com ([152.163.225.100]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15470J-0001d7-00 for rsgb_lf_group@blacksheep.org; Sun, 27 May 2001 21:19:11 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r04.mx.aol.com (mail_out_v30.22.) id l.d8.6ea46b1 (3969) for ; Sun, 27 May 2001 16:18:31 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: Date: Sun, 27 May 2001 16:18:31 EDT Subject: Re: LF: D-Layer Chart To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 120 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 5/27/01 6:58:30 AM Eastern Daylight Time, mike.dennison@ntlworld.com writes: << I don't get any colours on the map, just a yellow diamond. Does anyone know how to make this chart work? >> I believe John Sexton is correct in saying that it is working. According to the tabulated data, available from a link on the same page, the highest affected frequency at all latitudes and longitudes is currently 1.0MHz or less. This would render the whole map black, according to its legend. The diamond marks the region (presently over the Pacific Ocean, west of Baja California, Mexico) where the D-layer attenuation is greatest and the HAF is highest, the sub-solar point. 73, John Davis