Quote:
Originally Posted by Legbreaker
Time yes, but location will be seriously wrong after 3+ years without updates (of course you tend to need more than one satellite anyway for a fix so it's probably a moot point).
I'm not sure of the details, but the GPS satellites all have to have their clocks updated at least once every 24 hours. Something to do with the way gravity distorts time (yes, you read that right). A clock aboard a GPS satellite tends to run about 7 microseconds slower than an identical clock on earth.
http://www.astronomy.ohio-state.edu/...Unit5/gps.html |
Sounds more like the compensation for Einstein's Theory of Relatively where the faster you go, the clock goes slower, remember those satellites go at 18,000 MPH as they orbit the Earth.
Chuck