Delivered-To: daveyxm@virginmedia.com Received: by 10.67.23.138 with SMTP id ia10csp206983pad; Mon, 7 Oct 2013 17:54:34 -0700 (PDT) X-Received: by 10.180.93.166 with SMTP id cv6mr21611007wib.37.1381193673460; Mon, 07 Oct 2013 17:54:33 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id wg1si12429717wjb.115.1969.12.31.16.00.00; Mon, 07 Oct 2013 17:54:33 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VTL8X-0002kw-1c for rs_out_1@blacksheep.org; Tue, 08 Oct 2013 01:26:53 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VTL8W-0002kn-Lq for rsgb_lf_group@blacksheep.org; Tue, 08 Oct 2013 01:26:52 +0100 Received: from smtp3.virginbroadband.com.au ([123.200.191.53] helo=smtp.virginbroadband.com.au) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VTL8U-0000XM-BR for rsgb_lf_group@blacksheep.org; Tue, 08 Oct 2013 01:26:51 +0100 Received: from [123.200.236.228] (unknown [123.200.236.228]) by smtp.virginbroadband.com.au (Postfix) with ESMTP id 9620422D02B6; Tue, 8 Oct 2013 11:26:40 +1100 (EST) Message-ID: <5253513B.7030805@virginbroadband.com.au> Date: Tue, 08 Oct 2013 11:26:35 +1100 From: edgar User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: "600m@yahoogroups.com" <600m@yahoogroups.com>, "rsgb_lf_group@blacksheep.org" X-HELO-Warning: Remote host 123.200.191.53 (smtp3.virginbroadband.com.au) used invalid HELO/EHLO smtp.virginbroadband.com.au - verification failed X-Spam-Score: -0.2 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Group, I have recorded signals from HGA22, DCF39 and DK7FC from two antenna/receivers at different locations. The locations are 58 km apart. Recordings are 16 bits, mono, 22050 Hz, and 1.5 hours long. [...] Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [123.200.191.53 listed in list.dnswl.org] -0.2 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 7aa9ad08848e488e22e0ff1d71f4ef1d Subject: LF: Signal detection question 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 Status: O X-Status: X-Keywords: X-UID: 1047 Hi Group, I have recorded signals from HGA22, DCF39 and DK7FC from two antenna/receivers at different locations. The locations are 58 km apart. Recordings are 16 bits, mono, 22050 Hz, and 1.5 hours long. The "space" signal from HGA22, (135430 Hz) is usually stronger than from DCF39 (138830 Hz). Is the a method that can use the signals of HGA22 (or DCF39) as a clock (reference) to look for the weak DK7FC signal in the recording? I am wondering if the two wave files could be synchronised in some way to and then added together to cancel out the noise and highlight the DK7FC signal frequency. Regards, Edgar Moonah, Tasmania.