Return-Path: <majordom@post.thorcom.com> Received: (qmail 7538 invoked from network); 15 Dec 1999 22:01:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by 212.159.2.33 with SMTP; 15 Dec 1999 22:01:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11yMw5-0007ly-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 15 Dec 1999 22:30:17 +0000 Received: from smtp-out2.bellatlantic.net ([199.45.39.157]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11yMw4-0007lt-00 for rsgb_lf_group@blacksheep.org; Wed, 15 Dec 1999 22:30:16 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bellatlantic.net (client-151-200-127-21.bellatlantic.net [151.200.127.21]) by smtp-out2.bellatlantic.net (8.9.1/8.9.1) with ESMTP id RAA27675; Wed, 15 Dec 1999 17:03:51 -0500 (EST) Message-ID: <38580EF6.D5245005@bellatlantic.net> Date: Wed, 15 Dec 1999 16:58:14 -0500 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Andre' Kesteloot" <akestelo@bellatlantic.net> X-Mailer: Mozilla 4.02 [en]C-DIAL (WinNT; U) MIME-Version: 1.0 To: "rsgb_lf_group" <rsgb_lf_group@blacksheep.org> Cc: lf@amrad.org Subject: LF: 162 KHZ (Allouis) Field strength in Virginia Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: <majordom@post.thorcom.com> LF signals can propagate by ground wave or by sky wave. Most studies on LF propagation have concentrated on the ground wave mode and little data and analysis exist on sky wave propagation. J.S. Belrose et al presented data on LF skywave propagation in the Proceedings of the IEEE in May of 1959. This paper seems to be the best source of data on the subject. AMRAD is looking at acquiring data on European LF broadcast stations to help engineer the system necessary to achieve a transatlantic QSO on LF. Some early data has been collected by Sandy, WB5MMB and is shown here. Note the abrupt drop in signal level around 0700 GMT which corresponds with sunrise in the area of the transmitter. We are curious to know what other phenomena might be exploited to achieve a transatlantic QSO. The equipment consisted of an e-field probe on the roof of a 3-story building, and a military "Cubic 3030" receiver. You may look up the graph at http://www.amrad.org/projects/lf/162.jpg 73 Andre' N4ICK