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← ScienceWhich mechanism affecting GPS accuracy arises because Earth's gravity curves spacetime?
A)Gravitational time dilation✓
B)Atmospheric signal refraction
C)Ionospheric signal dispersion
D)Satellite orbital precession
💡 Explanation
GPS satellites experience gravitational time dilation due to Earth's spacetime curvature; clocks tick slower at lower gravitational potential. Therefore, if uncorrected, time dilation causes large navigational errors, rather than atmospheric or orbital perturbations with distance.
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