A geostationary satellite orbits the Earth with a period of 24 hours.
State
the direction of the orbit about the Earth,
the position of the satellite relative to the Earth’s surface,
a typical frequency for communication between the satellite and Earth.
A signal transmitted from Earth to a satellite has an initial power of 
. The signal power received by the satellite is attenuated by 
.
Calculate the signal power received by the satellite.
By reference to your answer in (i), explain why different frequencies are used for the up-link and the down-link in communication with the satellite.
to 
.
.
