Re: Speedometer Accuracy

[Bob Hadden <kbhadden@xxxxxxxxxxx>]

Marc,  Do you know how often the samples are taken?

Bob

On Jun 2, 2005, at 6:16 PM, Marco S Hyman wrote:

>> If one has GPS on the bike, is the speed display super accurate at any
>> given moment?
>
> No, it is not super accurate
>
> It depends upon satellite coverage, power savings settings, and how 
> straight
> the road.   If on tight twisties under trees don't believe the GPS.
> The GPS only knows where it is this sample period and where it was last
> sample period and assumes you were driving a straight line between
> samples.   OK, that's simplified as I'm sure they integrate over 
> several
> samples, but you get the picture.
>
> Before SA was turned off my GPS would sometimes report 1.2 - 1.3 MPH
> when I was stopped!  I figure that it could easily be off 1 - 2 MPH 
> when
> moving.
>
> // marc

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