Return-Path: Received: (qmail 28544 invoked from network); 11 Nov 1999 20:13:15 +0000 Received: from unknown (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 11 Nov 1999 20:13:15 +0000 Received: (qmail 10955 invoked from network); 11 Nov 1999 20:11:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 11 Nov 1999 20:11:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11m0D7-0002YS-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 11 Nov 1999 19:48:45 +0000 Received: from [143.179.236.32] (helo=Lesothosaurus.big-orange.net) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11m0D5-0002YN-00 for rsgb_lf_group@blacksheep.org; Thu, 11 Nov 1999 19:48:44 +0000 Received: from w8k3f0 ([143.179.150.60]) by Lesothosaurus.big-orange.net (Netscape Messaging Server 3.6) with SMTP id AAA6F0A; Thu, 11 Nov 1999 20:48:29 +0100 Message-ID: <001201bf2c7d$c8c8cc00$fd96b38f@w8k3f0> From: "Dick Rollema" To: "LF-Group" , "Hans Peltzer, PA0HRP" , "Ger van Went, PA0GER" , "Gamal Soegiono" Subject: LF: Fw: Calculating surface wave by AO Date: Thu, 11 Nov 1999 20:47:33 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To All from PA0SE -----Oorspronkelijk bericht----- Van: Brian Beezley Aan: Dick Rollema Datum: donderdag 11 november 1999 15:34 Onderwerp: Re: Calculating surface wave by AO >At 01:38 PM 11/11/99 +0100, you wrote: >>Dear Brian, >> >>Already several years ago I bought AO 6.36 and NEC/WIRES 1.62 from you and >keep on using it frequently with very satisfactory results. >> >>My main activity is now on our new LF-band 135.7 - 138.8 kHz. During >daylight hours contacts are mainly by means of the surface wave and though >AO does not compute that I wonder whether by some trick it I still could >find out something about it. >> >>For the benefit of EZNEC users I have asked Roy Lewallen the same question >and he says that the near field option in reality computes the total field >so outside the real near field region the surface wave is approximated. >> >>I presume AO does the same. As a kind of check I had AO compute the "near >field" at the maximum range of 10 km and found that E/H = 120*pi so it >certainly was outside the near field region. >> >>Thank you for your answer which I will put on the e-mail reflector of the >RSGB LF-Group. >> >>73, Dick, PA0SE >> >> > > >No version of AO computes the surface wave but NEC/Wires 2.0 does. > > >Brian >