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GPS satellites carry atomic clocks that provide extremely accurate time. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast.
Quick Answer. Scientists measure plate tectonics using GPS satellites, and they use computer models that simulate the motions of Earth's tectonic plates to try to predict future plate movements. By using GPS satellites in tandem with GPS receivers on the ground, scientists measure the rate of movement of the Earth's crust. Continue Reading