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← ScienceWhich mechanism modifies GPS satellite signal range due to curved spacetime?
A)Gravitational time dilation✓
B)Atmospheric signal refraction
C)Relativistic Doppler shift
D)Ionospheric signal scattering
💡 Explanation
Spacetime curvature near Earth due to its mass induces gravitational time dilation on GPS satellites; therefore, the satellite clock rate is affected, because general relativity predicts time dilation in a gravitational field, rather than other mechanisms like refraction.
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