SOLAR SYSTEM

Detailed explanation-1: -Internal combustion engines: Satellites do not use internal combustion engines because they require oxygen to operate, and there is no oxygen in space. Instead, satellites typically use electric propulsion systems, such as ion thrusters, to maneuver in orbit.

Detailed explanation-2: -A satellite is a light-weight device which cannot support high-power transmitters on it. So, it transmits at a lower frequency (higher the frequency, higher is the transmitter power to accommodate losses) as compared to the stationary earth station which can afford to use very high-power transmitters.

Detailed explanation-3: -Satellite communication has two main components: the ground segment, which consists of fixed or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself.

Detailed explanation-4: -Need for Satellite Communication Ground wave propagation and skywave propagation are the two ways communication takes place for a certain distance. The maximum distance covered by them is 1500 km, which was overcome by the introduction of satellite communication.

Detailed explanation-5: -A typical uplink frequency is 6 GHz, and a common downlink frequency is 4 GHz.