GPS satellites use atomic clocks, but due to relativistic effects (both special and general relativity), their clocks tick faster than those on Earth, requiring a correction to ensure accurate positioning. Feel free to look up all the literature online or at your local engineering school. One of the debates about future lunar infrastructure is what the time standard will be. The clocks there will have to have yet another frequency to stay in tune with clocks on the Earth.
Maybe you should not be trying to teach something you dont know much about. The nice thing about FR is learning from those with knowledge in areas you dont know so much about.
But you do have to have a ‘listening’ mode.
Atomic clocks are subject to vastly different conditions in space, vice on the earth. Different gravity, different radiation, etc.
The answer is that the accuracy of the measuring device is infinitesimally different in space, not that “time slowed down”.
Unreal how deeply sci fi has penetrated the modern brain.