Return-Path: Received: (qmail 17176 invoked from network); 8 Apr 2003 08:30:53 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 8 Apr 2003 08:30:53 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 28289 invoked from network); 8 Apr 2003 08:30:42 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 8 Apr 2003 08:30:42 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 192oUY-00011O-GC for rsgb_lf_group-outgoing@blacksheep.org; Tue, 08 Apr 2003 09:30:06 +0100 Received: from [134.58.240.45] (helo=thumbler.kulnet.kuleuven.ac.be) by post.thorcom.com with esmtp (Exim 4.14) id 192oUT-00011A-Fx for rsgb_lf_group@blacksheep.org; Tue, 08 Apr 2003 09:30:01 +0100 Received: from localhost (localhost [127.0.0.1]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 460BF1377FF for ; Tue, 8 Apr 2003 10:29:31 +0200 (CEST) Received: from lepidus.kulnet.kuleuven.ac.be (lepidus.kulnet.kuleuven.ac.be [134.58.240.72]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id F17A71377F9 for ; Tue, 8 Apr 2003 10:29:30 +0200 (CEST) Received: from dell-rik.fys.kuleuven.ac.be (pc-10-33-165-177.fys.kuleuven.ac.be [10.33.165.177]) by lepidus.kulnet.kuleuven.ac.be (Postfix) with ESMTP id CABB938007D for ; Tue, 8 Apr 2003 10:29:30 +0200 (CEST) Message-ID: <5.1.0.14.0.20030408102406.02f05cd0@u0019445.kuleuven.be> X-Sender: u0019445@u0019445.kuleuven.be X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Tue, 08 Apr 2003 10:30:34 +0200 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" In-reply-to: <5.1.0.14.0.20030407151723.00a9ea90@gemini.herts.ac.uk> References: <191xgH-175wvYC@fwd10.sul.t-online.com> <5.1.0.14.2.20030404222503.009f79d0@mail.pncl.co.uk> MIME-Version: 1.0 X-Virus-Scanned: by KULeuven Antivirus Cluster Subject: LF: Doppler shift Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Status: No, hits=-9.9 required=5.0tests=IN_REP_TO,REFERENCESversion=2.51 X-Spam-Checker-Version: SpamAssassin 2.51 (1.174.2.5-2003-03-20-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Hello group, The question is a bit off topic, so longwave-only readers can push the delete button now. A friend of mine is interested in QRSS tests on 10.1MHz (30 meter) and one of the things we are discussing is the longest useable dotlength is on that frequency. Apart from TX (and RX) stabilty doppler shift due to ionospheric refections will cause frequency instability. Does anyone have an idea how much Hz the doppler shift can be on 10MHz ? Is there any info available on the web ? 73, Rik ON7YD