Date: Thu, 04 May 2000 20:21:15 -0700 From: Doug Barton <DougB@gorean.org> To: Warner Losh <imp@village.org> Cc: Nate Williams <nate@yogotech.com>, hackers@FreeBSD.ORG Subject: Re: GPS heads up Message-ID: <39123E2B.B85E03BC@gorean.org> References: <200005041411.IAA17374@nomad.yogotech.com> <2288.957418565@critter.freebsd.dk> <200005040801.BAA67715@apollo.backplane.com> <200005042156.PAA43697@harmony.village.org>
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Warner Losh wrote:
>
> In message <200005041411.IAA17374@nomad.yogotech.com> Nate Williams writes:
> : That's very different from what the GPS experts at SRI tell me. They
> : start to average things out in a matter of hours, and within a week can
> : have it almost gone. However, they're also using multiple satellites,
> : which allows them to more quickly find the center.
>
> The experts here tell me that professional surveyers get sub meter
> accuracy with in about an hour with commercially available hardware.
> This was with SA.
The difference is the "commercially available hardware." The more
seperate signals you can discriminate with a given receiver, the faster
you can zero in on accuracy.
Doug
--
Excess on occasion is exhilarating. It prevents moderation from
acquiring the deadening effect of a habit.
-- W. Somerset Maugham
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