Date: Wed, 03 May 2000 16:38:20 -0600 From: Warner Losh <imp@village.org> To: Marc Nicholas <marc@netstor.com> Cc: "Brian O'Shea" <boshea@ricochet.net>, hackers@FreeBSD.ORG Subject: Re: GPS heads up Message-ID: <200005032238.QAA35010@harmony.village.org> In-Reply-To: Your message of "Wed, 03 May 2000 18:10:28 EDT." <Pine.BSF.4.05.10005031809370.21765-100000@medulla.hippocampus.net> References: <Pine.BSF.4.05.10005031809370.21765-100000@medulla.hippocampus.net>
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In message <Pine.BSF.4.05.10005031809370.21765-100000@medulla.hippocampus.net> Marc Nicholas writes: : Isn't that the idea behind Differential-GPS? Not quite. The Differential GPS has GPS receievers at locations that have been surveyed down to the millimeter. The DGPS software then calculates the offset from the current GPS signal and sends that information to the DGPS clients. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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