Endurance.Net Ridecamp Archives

You are correct. The frequency that GPS operates is not foliage 
penetrating - which translates to they don't work very well in the 
forest canopy.

Truman

Jerry & Susan Milam wrote:

> I think what both Nancy and I are trying to question is the accuracy of
> these watches under cover of trees. Using these things on roads where cars
> travel shouldn't be a problem generally because there is nothing interfering
> with the signal from the satellite. I don't normally ride my horse in the
> road unless I can't trailer somewhere. If there is a road I can usually geta
> fairly accurate map distance too.
>
> The need that Nancy and I have is a tool that will accurately measure
> forrested trail. We don't think these watches will give us accurate data for
> trail kind of riding. The satellites receive data from the watch every few
> seconds as long as there is nothing preventing transmission like folliage.
> If you're on a trail with tons of trees and lots of switchbacks the
> satellite may only receive a few signals during the course of a long period
> of time sometimes and it will plot from the last point received to the next
> point received and leave off significant mileage in between.
>
> I would hope that technology will advance, but I believe even the military
> GPS components have problems with this factor and sometimes cause
> considerable error.
>
> Susan Milam
>  




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