1. The problem statement, all variables and given/known data An Earth satellite used in the Global Positioning System moves in a circular orbit with period 11 hours and 58 min. The satellitle contains an oscillator producing the principal nonmilitary GPS signal. Its frequency is 1575.42 MHz in the reference frame of the satellite. When it is received on the Earth's surface, what is the fractional change in this frequency due to time dilation, as described by special relativity? 2. Relevant equations Fractional change = 1/2 (v/c)^2 3. The attempt at a solution Answer: 1/2 ( 3880m/s / c )^2 = 8.36*10^-11 Not sure if I'm even on the right track at all... some guidance would be much appreciated.