Gps, Science, Technology, Physics, Satellite.
gravitational potential on the surface of the Earth is about -62.6 MJ/kg, and the gravitational potential at the altitude of the GPS satellite is about -59.0 MJ/kg. The difference is 3.6 MJ/kg, which means that the clock in the satellite ticks faster by 0.000045 seconds (45 microseconds) per day,