Return-Path: Received: (qmail 20448 invoked from network); 29 Oct 1999 13:12:34 +0100 Received: from unknown (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 29 Oct 1999 13:12:34 +0100 Received: (qmail 5596 invoked from network); 29 Oct 1999 12:10:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 29 Oct 1999 12:10:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11hAfV-00067t-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Oct 1999 12:58:05 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mail2.hamilton-standard.com ([153.4.57.12]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11hAfU-00067k-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Oct 1999 12:58:04 +0100 Received: from curly.hsd.utc.com by mail2.hamilton-standard.com; (8.9.1/) id IAA19201; Fri, 29 Oct 1999 08:05:35 -0400 (EDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from umrsvr.hsd.utc.com by curly.hsd.utc.com; (5.65v3.2/1.1.8.2/27Feb96-0334PM) id AA12970; Fri, 29 Oct 1999 07:56:57 -0400 Received: from nmex01nt.hsd.utc.com by umrsvr.hsd.utc.com; (8.9.0/) id HAA01744; Fri, 29 Oct 1999 07:54:10 -0400 (EDT) Received: by nmex01nt.hsd.utc.com with Internet Mail Service (5.5.2448.0) id ; Fri, 29 Oct 1999 13:48:33 +0100 Message-ID: From: "Soegiono, Gamal" To: rsgb_lf_group@blacksheep.org Subject: LF: groundwave questions Date: Fri, 29 Oct 1999 13:48:32 +0100 X-Mailer: Internet Mail Service (5.5.2448.0) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hello all I have some questions on how electric and magnetic field lines are aligned, how fieldstrength will vary with distance from source in the following four academic cases. Constrains which are common for all cases: * No ionosphere present. * earth constitutes a level plain of matter with electric parameters as specified. * A vertically polarized electromagnetic field emanates from an otherwise unspecified source. * The fieldstrength when measured on ground is 1 V/m at a distance of 1 km from the source. (case 1) assume earth conductivity is infinity, rel. permeability equals ONE, rel. permitivity equals ONE (case 2) assume earth conductivity is ZERO, rel. permeability equals ONE, rel. permitivity equals ONE (case 3) assume earth conductivity is ZERO, rel. permeability equals ONE, rel. permitivity equals 80 (eight zero). (case 4) assume earth conductivity is ONE mhos/meter, rel. permeability equals ONE, rel. permitivity equals ONE. best 73 de Gamal