I use an HP iPaq PocketPC GSM phone with integral GPS that is similarly
accurate, though typically indicating speed and position deviations when
driving in heavy truck traffic, I'm guessing that's due to multipath
reflections.
On a recent trip I set the overspeed alert to 80 mph -- a bit above
surrounding traffic speed. On arriving at the airport, I tossed it into
my briefcase.
All was well until the takeoff roll. Forgetting that I had left the GPS
function on, at about (surprise) 70 knots (80 mph) the overspeed alert
started blaring -- and I started apologizing.
- Bob Mann, '68 2000 Solex
Tim wrote:
> About seven or so years ago I was cruising down I94 from Minneapolis (leaving
>a trade show with another computer geek riding shotgun) to Madison on my way
>home from the trade show. My passenger had his laptop out and was running (his
>new toy) newly installed GPS software. I was driving (at the time) a company
>owned late model GMC passenger van. My cruise control was set at around 75
>mph. According to the GPS software running on the laptop, I was running 72/73
>mph.
>
> I would call that fairly accurate.
>
> Tim
>
>
> ---- Dave Cooke <cookefam314@gmail.com> wrote:
>
> =============
> So, how accurate is a GPS at displaying actual speed? I calibrated my
> roadster speedo to my GPS & it showed I was consistently at least 5 mph
> below at low speeds & 8-10mph below at highway speeds.
>
>
> -DCooke
> Lake in the Hills, IL
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