[EMAIL PROTECTED] on 1-18-05 7:20 AM wrote:

> The first source of error, the accuracy of the altimeter's pressure sensing,
> is what can be calibrated.  [...]
> 
> The second source of error, the atmospheric model, [...]
> 
> The third source of error is probably the greatest one, and that is a
> deviation in temperature from the ideal atmospheric model.  [...]
> 
> [...]
> The majority of the error we see comes from non-ideal atmospheric conditions,
> not the altimeters themselves.
>
> Randy Brust
> Soaring Circuits

Randy and others,

What are the error/accuracy/precision rates of a GPS system and how do they
compare to the pressure sensing systems?  And of course, how does the cost
of a GPS based altimeter system compare.

-- 
Jim Holliman -- Tulsa, Oklahoma
AMA & TULSOAR

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