Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4D4BE380000B2; Wed, 16 Nov 2011 12:21:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RQjA3-00055Y-Qf for rs_out_1@blacksheep.org; Wed, 16 Nov 2011 17:20:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RQjA3-00055P-EO for rsgb_lf_group@blacksheep.org; Wed, 16 Nov 2011 17:20:35 +0000 Received: from moutng.kundenserver.de ([212.227.17.9]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RQj9z-0002om-C0 for rsgb_lf_group@blacksheep.org; Wed, 16 Nov 2011 17:20:35 +0000 Received: from [192.168.2.104] (p548D2921.dip.t-dialin.net [84.141.41.33]) by mrelayeu.kundenserver.de (node=mrbap2) with ESMTP (Nemesis) id 0LrZ6L-1QlWmC1LRN-01347B; Wed, 16 Nov 2011 18:20:25 +0100 Message-ID: <4EC3F0D8.4050403@legal-medicine.de> Date: Wed, 16 Nov 2011 18:20:24 +0100 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2.22) Gecko/20110907 SUSE/3.1.14 Thunderbird/3.1.14 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <66E491BAB91C48AF81191F4022525A14@DennisPC> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de> In-Reply-To: X-Provags-ID: V02:K0:L0Fbt5/q+GfSrfoVgP9o8Snuj43FYDjm5164b/aJq6s 57u7c+ryPzPliBqUvaTaq5XM4kkGf/d9qiRg6aODNtbHJoZ4B2 H2ypn3s77LZYNXg8hPpVpsZNZvQyegGKYoLpi82bJoaQdkFjDI Iox2oLN+aft5CL2kw1dfSIPtz7y/FajaD4X26jFH6y/Ef25E7r 1jzYhY8bsME5ZW7O8TeGy6Lh5KO3NXW1EDvliJWlg0xpvbyzgy FDHdHnz9CM+5gkCMUJ26YGEgMgzg/M6ZjN2z0SrGdWDEeKaSCY rKi4LShyEOTL7jLl3x0gGtRCSizduuwtoLtTtqrKP8UMHTqF9g AjZzePa52k8t4FBZkEZY= X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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-SCOLL-SCORE: 0:2:396743520:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d41164ec3f11b18ec X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Roger, You wrote: >... > By the way, do we know exactly WHAT Paul Nicolson does to detect such weak > signals so well? Has anyone heard/read technical details of his > super-sensitive and well engineered receiving systems? > ... AFAIK: Antennas: crossed loops at ground level, 20m^2 each, balanced by high quality transformers ~300m apart from any buildings etc. amongst sheep and moles. (Cannot find the photo from Todmorden...) RX: 2x LT1028 to some hundred metres of CAT? feeding 2x M-Audio Audiophile 192 running on a Linux box. Both soundcards are synchronized by GPS 1pps via the 2nd audio channel. Software is homebrewed and consists of a complex and sophisticated network of building blocks written in C running on Linux connected via UNIX-streams. See: http://abelian.org/vlf/spectrum.shtml A third channel includes the signal from an E-field probe also synchronized by GPS. So all samples are time stamped (!). Listen: http://abelian.org/vlf/ (May be you can feed his signal stream to your software?) The intentions are mainly to detect ionospheric effects. See his very early attempts: http://abelian.org/sid/ Peter, df3lp