Warner Losh wrote:
>
> In message <[EMAIL PROTECTED]> 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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