Return-Path: Received: (qmail 28156 invoked from network); 29 Oct 1999 11:42:04 +0100 Received: from unknown (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 29 Oct 1999 11:42:04 +0100 Received: (qmail 957 invoked from network); 29 Oct 1999 10:50:21 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 29 Oct 1999 10:50:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11h8y4-0005AH-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Oct 1999 11:09:08 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mail.sci.fi ([195.74.0.53] helo=pefletti.saunalahti.fi ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11h8y0-0005AB-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Oct 1999 11:09:05 +0100 Received: from default (MMMDXXIII.hdyn.saunalahti.fi [195.197.47.223]) by pefletti.saunalahti.fi (8.9.1/8.9.1) with SMTP id NAA19582 for ; Fri, 29 Oct 1999 13:09:00 +0300 (EET DST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.6.32.19991029130906.007dbcb0@laatikko.saunalahti.fi> X-Sender: vaiski1@laatikko.saunalahti.fi (Unverified) X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Fri, 29 Oct 1999 13:09:06 +0300 To: rsgb_lf_group@blacksheep.org From: =?iso-8859-1?Q?V=E4in=F6_Lehtoranta?= Subject: LF: New EMRP estimations MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi LF folks, CORRECTIONS & ADDITIONS to 136 kHz EMRP calculations: Earlier approximations were wrong, as is usually goes.. We could, at the last moment, arrange a Field strength measurements of Reinos's OH1TN 136.4 kHz transmission. Reino was running "full available power" with 100 W out The "sigma" value used for calculations now is based on earlier comparisons and measurements made on LF. Measurements were on 28 October 1999, at full daylight. The Fs table below is based on estimated EMRP of 300 mW. ---------------------------------------------------------- GROUND WAVE FIELD-STRENGTH, MILLINGTON METHOD OH1TN -> OH2LX (Measuring station), d = 152 km FIELD-STRENGTH DB ABOVE 1 MICROVOLT/METER EPS =10.0 SIG = .6 mS/m FREQ = 136.4 kHz POWER = .30 W DIST. (KM) F-S (DBU) 1.0 74.1 2.0 68.0 3.0 64.4 4.0 61.8 5.0 59.8 6.0 58.1 7.0 56.7 8.0 55.5 9.0 54.4 10.0 53.4 20.0 46.6 30.0 42.3 40.0 38.9 50.0 36.2 60.0 33.5 70.0 31.4 80.0 29.5 90.0 27.8 100.0 26.4 110.0 24.9 120.0 23.5 130.0 22.2 140.0 20.9 150.0 19.7 160.0 18.6 170.0 17.4 180.0 16.4 190.0 15.3 200.0 14.3 210.0 13.3 END OF CIRCUIT ------------------------------------------------------ ---------------------------------------------------------- V.K.Lehtoranta, OH2LX, POBox 50, FIN-05401 Jokela, Finland ------ Tel: +358-9-4173965 ---- Fax: +358-9-4173961 ------ E-mail: vaiski@dlc.fi - alias: oh2lx@dlc.fi & oh2lx@sral.fi