Return-Path: Received: from mtain-de07.r1000.mx.aol.com (mtain-de07.r1000.mx.aol.com [172.29.64.207]) by air-di03.mail.aol.com (v127_r1.1) with ESMTP id MAILINDI033-eac04b9f20dc266; Tue, 16 Mar 2010 02:10:36 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 26384380000A5; Tue, 16 Mar 2010 02:10:35 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NrPyC-0001kn-V6 for rs_out_1@blacksheep.org; Tue, 16 Mar 2010 06:09:36 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NrPyC-0001ke-KU for rsgb_lf_group@blacksheep.org; Tue, 16 Mar 2010 06:09:36 +0000 Received: from mx.omskcity.com ([79.133.160.2]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NrPy9-0008S0-PO for rsgb_lf_group@blacksheep.org; Tue, 16 Mar 2010 06:09:36 +0000 Received: from noname.nodomain.nowhere (host209.161-133-79.sotline.ru [79.133.161.209]) by mx.omskcity.com (8.13.6/8.13.6) with ESMTP id o2G69TGI024461 for ; Tue, 16 Mar 2010 12:09:30 +0600 (OMST) (envelope-from fitec@omskcity.com) Received: from localhost (fitec@localhost) by noname.nodomain.nowhere (8.8.5/8.8.5) with SMTP id GAA00271 for ; Tue, 16 Mar 2010 06:03:44 GMT X-Authentication-Warning: noname.nodomain.nowhere: fitec owned process doing -bs Date: Tue, 16 Mar 2010 06:03:44 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org In-Reply-To: Message-ID: MIME-Version: 1.0 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.1.8 (mx.omskcity.com [79.133.160.2]); Tue, 16 Mar 2010 12:09:32 +0600 (OMST) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Ionospheric VLF propagation Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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-aol-global-disposition: G x-aol-sid: 3039ac1d40cf4b9f20db0c82 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) On Tue, 16 Mar 2010, Markus Vester wrote: > > E = c * B = 0.93 uV/m = - 0.5 dBuV/m. By the way it is very close to estimation: E(800km) ~ E(100km)*sqrt(100km/800km) where E(100km) calculated without ionospere, as you, Markus, calculated. Certanly it is very rought formala. Up to the order only. This formula can be derived from asumption that for 100 km as 'right ionosphere formula' and 'whithout ionospere formula' are adequate both. 'Ionosphere formula' is E = A/sqrt(d) whith unknown A. Certanly value of A can be calculated theoretically. But it is too much work. Or one should read textbooks:-) Regards, Alexander/RA9MB