Date: Sat, 06 May 2000 20:23:23 +0100 (BST) From: Duncan Barclay <dmlb@ragnet.demon.co.uk> To: Mike Smith <msmith@freebsd.org> Cc: hackers@FreeBSD.ORG, (Nate Williams) <nate@yogotech.com> Subject: Re: [OT] Finding people with GSM phones (was Re: GPS heads up ) Message-ID: <XFMail.000506202323.dmlb@computer.my.domain> In-Reply-To: <200005061855.LAA07340@mass.cdrom.com>
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On 06-May-00 Mike Smith wrote: >> > With one tower, you're down to describing an arc along which >> > the phone is probably located; still pretty good when it comes to finding >> > someone. >> >> He seemed to imply that they could get it within 25m, even with one >> phone. Like I said, I don't understand how, but I didn't question his >> ability. Plus, he knows alot more about the stuff than I do. http://www.cursor-system.com/ Cambridge positioning Systems have developed some technology to do this for GSM. Positioning isn't built into the GSM system - yes they can tell what sector of a base station a mobile is in but much more than that is difficult. The other cells a mobile is aware of aren't aware of the mobile. Duncan --- ________________________________________________________________________ Duncan Barclay | God smiles upon the little children, dmlb@ragnet.demon.co.uk | the alcoholics, and the permanently stoned. ________________________________________________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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