Return-Path: Received: from rly-de11.mx.aol.com (rly-de11.mail.aol.com [172.19.170.147]) by air-de02.mail.aol.com (v121.5) with ESMTP id MAILINDE021-510485a9c7f291; Thu, 19 Jun 2008 13:51:22 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de11.mx.aol.com (v121.5) with ESMTP id MAILRELAYINDE111-510485a9c7f291; Thu, 19 Jun 2008 13:50:58 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1K9OHP-0001oO-OL for rs_out_1@blacksheep.org; Thu, 19 Jun 2008 18:50:39 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1K9OHP-0001oF-2J for rsgb_lf_group@blacksheep.org; Thu, 19 Jun 2008 18:50:39 +0100 Received: from mserv4.leeds.ac.uk ([129.11.76.223]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1K9OHL-0002qs-Di for rsgb_lf_group@blacksheep.org; Thu, 19 Jun 2008 18:50:38 +0100 Received: from dexbr1.ds.leeds.ac.uk (dexbr1.leeds.ac.uk [129.11.76.19]) by mserv4.leeds.ac.uk (8.14.2/8.14.2) with ESMTP id m5JHo9R7007342 for ; Thu, 19 Jun 2008 18:50:29 +0100 (BST) Received: from HERMES4.ds.leeds.ac.uk ([129.11.5.130]) by dexbr1.ds.leeds.ac.uk with Microsoft SMTPSVC(6.0.3790.3959); Thu, 19 Jun 2008 18:50:09 +0100 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Date: Thu, 19 Jun 2008 18:46:12 +0100 Message-ID: <731EB49F88B309428FFDDD2423F810E441C00F@HERMES4.ds.leeds.ac.uk> X-MS-Has-Attach: X-MS-TNEF-Correlator: <731EB49F88B309428FFDDD2423F810E441C00F@HERMES4.ds.leeds.ac.uk> Thread-Topic: LF: Re: Loran C Thread-Index: AcjSNAO/R6Axtd5yTlSDgfOIxWBJ+gAAFl7S References: <005301c8d182$93d802a0$0200a8c0@LapTop1><008f01c8d189$47145a20$0900a8c0@AM><485A7BC5.1080206@g3ysx.org.uk> From: "Chris Trayner" To: X-OriginalArrivalTime: 19 Jun 2008 17:50:09.0526 (UTC) FILETIME=[EA8C6160:01C8D234] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01C8D234.EA7A227D" Subject: RE: LF: Re: Loran C 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: domain : post.thorcom.co ; SPF_helo = X-AOL-SCOLL-AUTHENTICATION: domain : leeds.ac.u ; SPF_822_from = X-Mailer: Unknown (No Version) ------_=_NextPart_001_01C8D234.EA7A227D Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable > I had been told - clearly from a not too informed source - that GPS timing units were used at each base station. > Does the same apply to 3G (or GSM for that matter) mobile networks as well= ? I'd guess not. Why would they bother? They've got links (whether microwave o= r landline) back to somewhere more central. The more central places could ha= ve a time source, whether GPS or other. The time signals could be distribute= d in some priviledged data frame which doesn't wait in any queue. Mobile systems are complicated, of course, and there might be an unobvious r= eason to use GPS ... 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