(a)[3]
State three characteristics of a geostationary satellite’s orbit.
(b)[2]
A signal is sent from Earth to a geostationary satellite. At the start, its power is $3.2\,\text{kW}$. The signal experiences an attenuation of $194\,\text{dB}$. Calculate the power of the signal received by the satellite.
(c)[2]
Suggest one advantage and one disadvantage of using geostationary satellites instead of polar-orbiting satellites for communication between points on the Earth’s surface.