Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5796738000A9B for ; Wed, 4 Jul 2012 13:15:55 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SmSmU-0004UA-9Y for rs_out_1@blacksheep.org; Wed, 04 Jul 2012 17:50:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SmSmT-0004U1-Sr for rsgb_lf_group@blacksheep.org; Wed, 04 Jul 2012 17:50:21 +0100 Received: from moutng.kundenserver.de ([212.227.17.8]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1SmSmR-0002mb-TP for rsgb_lf_group@blacksheep.org; Wed, 04 Jul 2012 17:50:20 +0100 Received: from [192.168.2.104] (pD9522CC0.dip.t-dialin.net [217.82.44.192]) by mrelayeu.kundenserver.de (node=mreu1) with ESMTP (Nemesis) id 0M8n1M-1SejYM2FKe-00ClPd; Wed, 04 Jul 2012 18:50:18 +0200 Message-ID: <4FF4744A.1020404@legal-medicine.de> Date: Wed, 04 Jul 2012 18:50:18 +0200 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2.24) Gecko/20111101 SUSE/3.1.16 Thunderbird/3.1.16 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Provags-ID: V02:K0:Zp1Ww61P1Wt8R981hS8mLgUNPGNxhH2hjZ09Vq9Plt5 mcjcuxIrqjiao+me4gFNIhnVhCoAqPeUIjovANEL+TFdI3HhSY bUELMUtrkNG/7upk8lWrCxqkX8p6u2wWGxzZCTF8JN1qYijfUd 1ZiJ2FXBaPfG0CHfeJLYAGIxuPlkEH81W4R6MBVllTIkB9xWIm SQdwWkmW98x8GWfW5v8DWZ4mUr+1cZnDnHU1c54JazonDoWB5J HHykj7FP7AMpL8gYSIIJOm+Zxs8+aj0WNhBZEe04IrSQxTEMv9 rrYbHlWH88z1NsLF4jbvX/21/NxHp9ovwWDrp/lDjGE+Yzl/on z9DsY1ybWVt06dSITXmdDX5lB2c++PB4gNPEx3I2k X-Spam-Score: -0.0 (/) 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, I'm observing the strength of HGA22 since some years. At late evening of 2012-07-02 strong thunderstorm activity happened over E-Germany/Poland/Czech Republic. That's right below the reflection area, assuming a 1-hop propagation. See: http://www.df3lp.de/misc/hga22/propagation_path.png [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.227.17.8 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: e90dcb17768c7e768f13e0721cc1c0c7 Subject: LF: Thunderstorms and LF-Propagation Disturbances Content-Type: text/plain; charset=ISO-8859-15; 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: 0:2:374146176:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40d74ff47a4a37af X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi, I'm observing the strength of HGA22 since some years. At late evening of 2012-07-02 strong thunderstorm activity happened over E-Germany/Poland/Czech Republic. That's right below the reflection area, assuming a 1-hop propagation. See: http://www.df3lp.de/misc/hga22/propagation_path.png It's well known that lightnings may heat the ionosphere from below causing disturbances (SIDs). I very often observed those phenomena called "early/fast events". But what happened last Monday evening looks record-breaking. I never saw such chain of ionospheric disturbances. See: http://www.df3lp.de/misc/hga22/2012-07-02_thunderstorm.png Yellow is the raw signal at 10 samples/sec. and blue represents a running median of 100 data points. The comb-like structures are from the modulation bursts - I'm receiving the "space" frequency only. As you can see that's all "signal" and not qrn/qrm or local interference. A control receiver running ~6km apart confirms the observations. Peter, df3lp