Most people are familiar with the concept of an NTP server. It is a crucial component of any computer network, such as keeping the exact time (in the nano-second). But what does the SA-nav system in your car or truck have to do with an NTP server?

The answer is that they both use the GPS signal to function accurately. Although they may not recognize that all people on one of the 30 + GPS satellites operate in the possession of the American government is an extremely accurate atomic clock. An atomic clockmeasures the time with the resonance of an atom, which why it is so very accurate, within a few nanoseconds.