What sensitivity must Earth-based receivers have to receive signals from MRO? Express it as a minimum value for the electric-field amplitude in the radio waves at the receiver, and base your answer on the greatest possible Earth–Mars distance, about 400 million km.
What sensitivity must Earth-based receivers have to receive signals from MRO? Express it as a minimum value for the electric-field amplitude in the radio waves at the receiver, and base your answer on the greatest possible Earth–Mars distance, about 400 million km.
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What sensitivity must Earth-based receivers have to receive signals from MRO? Express it as a minimum value for the electric-field amplitude in the radio waves at the receiver, and base your answer on the greatest possible Earth–Mars distance, about 400 million km.
Transcribed Image Text:Rovers on the surface of Mars communicate data to
the Mars Reconnaisance Orbiter (MRO), which orbits
Mars and relays the data to Earth. MRO uses a
100-W radio transmitter, and its high-gain antenna
(HGA) has a 3-m parabolic dish that focuses the
radio signal into a narrow band, effectively increasing
the transmitter power by a factor of 50,000.
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