RE: Speedometer Accuracy

["Seattle Dan" <danweb@xxxxxxxxxxxx>]

Here's something that I found that agrees with Marco:


GPS Speed: 
How accurate is it?  How fast can I go?  How HIGH can I go?

GPS receivers display speed and calculate the speed using algorithms in the
Kalman filter.   Most receivers compute speed by a combination of movement
per unit time and computing the doppler shift in the pseudo range signals
from the satellites.   The speed is smoothed and not instantaneous speed. 



HOW ACCURATE IS THE  SPEED READING?