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← ScienceWhich timing discrepancy results for GPS satellites because of altitude?
A)Time dilation shifts measured frequency✓
B)Signal multipath creates echoes
C)Doppler errors alter satellite position
D)Atmospheric drag shortens orbital period
💡 Explanation
Time dilation arises from general relativity via the equivalence principle: satellites at altitude experience less gravity, causing clocks to run faster. Therefore, measured frequency will be blueshifted rather than lower, because greater gravity influence implies reduced temporal rate.
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