Ridecamp: Re: [RC] GPS

I hit the send button too soon. There are 24 operational birds on orbit.
 You can see about 1/3 of the sky from the mid latitudes on the earth. Any
birds on the horizon are of no use. In the mid latitudes if you can see down
to 10 degrees elevation above the horizon you will be able to see 6 birds.
If you can see down to 15 degrees you can see 4 birds. In order to be certain
to see 4 birds you need clear visibility down to 15 degrees in all directions.
In the mountains this can be difficult. Your reciever will function with
three birds, but it fixes the location at mean sea level. If you can not
see at least three it will go to sleep. 

Truman

amber applegate wrote:
> I have to differ with that statement, Truman. I ride in nothing but
> mountains, forest, valleys and my garmin gps works great. Why would they
> make them if they couldn't be used in all types of terrain? I carry it
> zipped up in my saddlepack even, it has always recorded everything. Only
> problem I have with it is the batteries use up way too fast. I can only get
> about 7 hours on a set of batteries, even using the battery saving mode.
>
> So I missed the beginning of this thread, is it not allowed to be used in
> AERC? and if so, why?
> amber
>
>
>
>
> > Unless you are riding in pretty flat, open terrain - no follage cover,
> > no valleys, no hills, etc.- the GPS won't do much of a job with what you
> > want since your satellite coverage will be limited. On a ride last year
> > I turned my on doing a 24 mile loop just for grins. This loop was pretty
> > open - no trees - but there was enough blockage from hills and valleys
> > that the 24 miles ended up showing up as 11 on the unit.
> >
> > Great tool for what it was designed to do but it does take some
> > judgement in reading the results.
> >
> > Truman
> >
> >     
>
>
>
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