Return-Path: Received: (qmail 13389 invoked from network); 22 Jul 1999 15:50:10 +0100 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 22 Jul 1999 15:50:10 +0100 Received: (qmail 1127 invoked from network); 22 Jul 1999 14:52:28 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 22 Jul 1999 14:52:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 117JzU-0003qQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 22 Jul 1999 15:38:32 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from fm215.facility.pipex.com ([194.131.104.225]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 117JzS-0003qI-00 for rsgb_lf_group@blacksheep.org; Thu, 22 Jul 1999 15:38:30 +0100 Received: from walter (userm166.uk.uudial.com [193.149.77.216]) by fm215.facility.pipex.com (8.8.6/8.8.6) with SMTP id PAA10441; Thu, 22 Jul 1999 15:34:15 +0100 (BST) Message-ID: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Sender: blanch@mailhost.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Pro Version 4.0 Date: Thu, 22 Jul 1999 15:32:52 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: Re: LF: OH2LX comments on measuring field strength Cc: "Koos Fockens, PA0KDF" , "Klaas Spaargaren, PA0KSB" , "Jaap Kroon, PA0IF" , "Hendrik de Waard, PA0ZX" In-reply-to: <000f01bed384$bbe45600$2a96b38f@w8k3f0> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: At 16:23 21/07/99 +0200, Dick Rollema wrote: ..............................................Vaino mentioned DGPS. This stands for Differential GPS. I have heard that the corrections to be applied to the GPS data in order to become a more accurate fix are transmitted via existing MF or LF beacons. Perhaps Vaino can tell via a message on the reflector if what I have heard is correct or not. Yes........nearly all the MF beacons you can hear between 285 ....315 kHz are now transmitting diff. Most 100 Bd ; some 200. Also, the Sylt Loran-C tx (12.5 Bd PPM) and a couple of LF stations atround 123 kHz. With a good GPS set you can get 1-2 metres. I've successfully tracked all of them up to 900 kms range in daylight; and as far as Cape Race NFLD, at night. Walter G3JKV.