4 ms·

You are theoretically correct (the best kind of correct). However: Is this difference of a magnitude exceeding everyday nonrelativistic clock drift?

• fsh 3y ago
  Yes, this is a huge effect relative to the stability and accuracy of modern atomic clocks. Even a few hundred meters of elevation difference on earth is easily visible in clock comparisons and has to be accounted for.
  • robertlagrant 3y ago
    But to what extent? 1s a day? 1s a century?
    • fsh 3y ago
      It's in the article: 58.7 microseconds per day which corresponds to 17.6 km of position drift in navigation applications.