[amsat-bb] Re: GPS Time observation
wa6fwf at sbcglobal.net
Thu Feb 2 08:09:56 PST 2012
Check out http://gpsinformation.net/main/gpstime.htm
The short answer is, the internal GPS clock for position is very
accurate or it could not make to calculations needed as to where you
are at, but there are many factors
that might delay what time it gives to you on a display panel or through
a serial cable.
On 2/2/2012 7:28 AM, Vince Fiscus, KB7ADL wrote:
> I have an old GPS unit, a Magellan explorist 210. It's fairly
> accurate determining position. After it has acquired about eight to
> ten satellites the position error averages between 20 to 35 feet.
> Now the question, the other day I was looking at one of the
> information pages the unit can display and on it, it gives the time in
> UTC. Just for fun I thought I would see how close the time was to
> WWV. I was surprised to see the unit was between one to four seconds
> off over various tests compared to WWV. IS this typical of all GPS
> units or do some display the time of day more accurately?
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