Return-Path: Received: from mtain-mc12.r1000.mx.aol.com (mtain-mc12.r1000.mx.aol.com [172.29.96.84]) by air-de05.mail.aol.com (v129.4) with ESMTP id MAILINDE052-5eb34d5082161; Mon, 07 Feb 2011 18:36:54 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mc12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3C21A3800009C; Mon, 7 Feb 2011 18:36:52 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PmacT-0001uQ-9u for rs_out_1@blacksheep.org; Mon, 07 Feb 2011 23:35:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PmacS-0001uH-RX for rsgb_lf_group@blacksheep.org; Mon, 07 Feb 2011 23:35:44 +0000 Received: from out1.ip04ir2.opaltelecom.net ([62.24.128.240]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PmacQ-0002wn-6Y for rsgb_lf_group@blacksheep.org; Mon, 07 Feb 2011 23:35:44 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AhwCADgQUE1cHYX//2dsb2JhbACIWI1zP44cc7lEhVoEjy8 X-IronPort-AV: E=Sophos;i="4.60,439,1291593600"; d="scan'208";a="323427213" Received: from unknown (HELO xphd97xgq27nyf) ([92.29.133.255]) by out1.ip04ir2.opaltelecom.net with SMTP; 07 Feb 2011 23:35:35 +0000 Message-ID: <001101cbc71f$b57f3f00$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <252130CB355C48E4BC32BA23475FEF68@White> Date: Mon, 7 Feb 2011 23:35:30 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Re: OE5ODL over different paths Content-Type: text/plain; charset="iso-8859-1" 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-sid: 3039ac1d60544d5082141514 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Jim The variations in signal you observed was due to the Balloon being buffeted about due to wind, thermal dynamics, and up drafts and not a valid propagation study. I was in touch with Ossi and he described to me that the baloon was almost horizontal at times, therefore the wire antenna attached would vary from vertical, slant, horizontal. He also said that the antenna current was well down at times, so many variables effecting the transmitted signal. All the facts have to be gathered before a valid observation is made otherwise its all Guesswork and supposition. To do a meaningful propagation study the transmitted signal needs to be launched from a FIXED antenna. The same criteria applies to Kite borne antennas. mal/g3kev ----- Original Message ----- From: "James Moritz" To: Sent: Monday, February 07, 2011 11:09 PM Subject: LF: Re: OE5ODL over different paths > Dear Ossi, Markus, LF Group, > > I was quite interested to notice the sharp dip in OE5ODL's signal at around > 1430utc today, and in light of Markus' comments, I used the cursor > facilities in SpecLab to manually read off the signal levels, avoiding the > noise bursts. I also did a quick field strength calibration of the > loop/receiver - the resulting plot of field strength vs time is shown in the > attachment (the vertical axis should say "dBuV/m"). As well as the deep null > around 1430, the signal level seems to rise several dB during the day, > peaking around 1800 - 2000, and now starting to fall off. Also, a downwards > drift in frequency of about 1.5mHz can be seen. > > Cheers, Jim Moritz > 73 de M0BMU >