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Cellular forums Home > Archive > GPS > June 2006 > Altiude Accuracy ?
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Altiude Accuracy ?
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| waterboy@financier.com 2006-06-22, 10:33 pm |
| I notice the Horizontal accuracy on my
Garmin Fortrex 101 is displayed, and varies.
I was wondering how accurate the Altitude accuracy is?
Does it vary also, or is it more, or less accurate?
thanks
waterboy
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| Sam Wormley 2006-06-23, 4:33 am |
| waterboy@financier.com wrote:
> I notice the Horizontal accuracy on my
> Garmin Fortrex 101 is displayed, and varies.
>
> I was wondering how accurate the Altitude accuracy is?
>
> Does it vary also, or is it more, or less accurate?
>
> thanks
> waterboy
>
Based on geometric arguments, altitude has roughly
twice the error of horizontal position.
Actually the Garmin Fortrex 101 estimate, not measures,
error... and should be taken with a grain of salt.
-Sam Wormley
http://edu-observatory.org/gps/gps_accuracy.html
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