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Which effect on GPS satellite timing accumulates because of orbital motion?

A)Time dilation from special relativity
B)Redshift from gravitational contraction
C)Blueshift increase near perihelion
D)Length contraction shortens signal pulses

💡 Explanation

Increased relative velocity in orbit results in time dilation, a special relativistic effect. Because the satellites are moving relative to Earth-bound observers, their time slows, therefore the GPS requires clock correction rather than the alternatives affected mostly by gravity changes.

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