Multiple Choice
How does the ionosphere affect GPS?
A) GPS satellites orbit Earth in the ionosphere.
B) GPS ground stations lose contact with geosynchronous satellites orbiting near the poles.
C) GPS signals much pass through the ionosphere,whose gases weaken the signal.
D) Positively charged ions in the ionosphere speed up the GPS signal,causing signal error.
Correct Answer:

Verified
Correct Answer:
Verified
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