We normally think of atomic clocks as the gold standard in timekeeping. The very definition of a second ... you might start with rubidium at a less accurate 6.8 GHz. If you want to know ...
There are 24 satellites in the GPS system each with 4 atomic clock sources (Rubidium or Cesium ... works you need to watch Grace Hopper’s explanation of how far a nanosecond is.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback