Envelope-to: dave@picks.force9.co.uk Delivery-date: Mon, 06 Jun 2005 13:08:41 +0100 Received: by ptb-mxcore03.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1DfGPE-0004fQ-FI for dave@picks.force9.co.uk; Mon, 06 Jun 2005 13:08:41 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (PlusNet MXCore v2.00) id 1DfGPE-0004fF-BU for dave@picks.force9.co.uk; Mon, 06 Jun 2005 13:08:36 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DfGO1-0002FI-TJ for rs_out_1@blacksheep.org; Mon, 06 Jun 2005 13:07:21 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DfGO0-0002F9-Lz for rsgb_lf_group@blacksheep.org; Mon, 06 Jun 2005 13:07:20 +0100 Received: from bay102-f11.bay102.hotmail.com ([64.4.61.21] helo=hotmail.com) by relay2.thorcom.net with esmtp (Exim 4.51) id 1DfGSj-0002nn-CQ for rsgb_lf_group@blacksheep.org; Mon, 06 Jun 2005 13:12:16 +0100 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 6 Jun 2005 05:07:09 -0700 Message-ID: Received: from 64.4.61.205 by by102fd.bay102.hotmail.msn.com with HTTP; Mon, 06 Jun 2005 12:07:09 GMT X-Originating-IP: [64.4.61.205] X-Originating-Email: [hellozerohellozero@hotmail.com] X-Sender: hellozerohellozero@hotmail.com From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Mon, 06 Jun 2005 04:07:09 -0800 Mime-Version: 1.0 X-OriginalArrivalTime: 06 Jun 2005 12:07:09.0991 (UTC) FILETIME=[4413CB70:01C56A90] Subject: LF: MARIS on LF? Content-Type: text/plain; charset=windows-1252; format=flowed 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit Ive been following the antennae (dipole and monopole) deploy issues on the MARS Explorer with interest, more to do with the frequency range for the sound profiling radar to be used given they are looking to get data back from a number of Kms beneath Mars surface. But I spotted that they will/may try to use the sounder mainly in the low Mhz range possibly down to 100Khz and was more interested in the matching of the "dipole" at this sort of frequency given past issues with short dipoles close to earth/"earth" at LF and would be interested in the matching circuit/efficiency more for pure physics than for practical apps in free space. Anyway I offer the following: http://www.marsis.com/index.php3?page=instrument_description.php3 for interest Laurence KL1X em26aq