Chemistry, 12.05.2021 21:40 yoangel9183

How are communication signals on the ground sent to spacecraft? A )The signals must be sent from ground stations to orbiting satellites and then on to spacecraft.

B )The signals are sent directly to spacecraft using radio waves.

C )The signals will not reach the spacecraft directly from Earth.

D )The signals must be changed to another form at ground stations to travel through space.

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How are communication signals on the ground sent to spacecraft? A )The signals must be sent from gr...