If GPS satellite clocks ignored Einstein's relativity, about how fast would position errors grow?

The answer

Clocks in orbit run faster in weaker gravity (general relativity) and slower because they are moving (special relativity). Net effect: about 38 microseconds a day, which is roughly 10 km of ranging error if you do not correct it. GPS only works because the clocks are built for that.

Correct answer: On the order of 10 kilometers per day