Accurate Timepiece

[freshy1234]

Sort of true, but not relevant to consumer GPS Receivers.

I thought that it was the receiver that calculated position.
Making accurate time very important to the device...

[ZEEBEE]

I thought that it was the receiver that calculated position.
Making accurate time very important to the device...

True, the receiver does calculate the position, but the timing necessary for that is embedded in the PSN code that is part of the signal stream.
That comes from the individual satellite rubidium clock that is uddated periodically by the Ground stations that are locked to a Hydrogen maser standard at Goddard or somewhere like that.

[BPH63]

i went and bought my first watch in 20 years - from Kmart -$19.95 (couldn't find any of those $5 ones - do they exist?) after being told by instructor mobile phone not good enough. Bloody aviation costs!

[Towering Q]

This guy has the right idea.

[apache]

Actually, that guy has NO IDEA!