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← ScienceWhich outcome arises when a GPS satellite signal passes through compressed atmospheric conditions?
A)Refraction increases signal path delay✓
B)Doppler shift matches altitude correction
C)Signal becomes temporarily phase-locked
D)Path delay matches orbital period shift
💡 Explanation
Signal refraction increases path length because atmospheric density causes increased curvature, and therefore additional time delay; the signal arrival is delayed rather than advanced because the refractive index increases with pressure.
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