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Which 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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