What is the difference between satellite and radio communication?

What is the difference between satellite and radio communication?

There are two main differences between the systems used by radio stations on Earth and those used in satellite communications. Secondly, satellites carefully direct this narrow beam in one direction (right at the exact spot where it knows the antenna will be) while radio stations broadcast in all directions.

What is the power of satellite communication?

The heavier the load, the more it costs to launch it. Today’s satellites are frugal with power, which is usually supplied by arrays of solar cells. A typical communications satellite needs between 1 and 1.5 kilowatts of electricity, and the space shuttle manages on 12.5 kilowatts.

Why is high frequency used in satellite communication?

The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points.

What are the advantages of satellite radio?

Satellite radio has several advantages over conventional AM and FM stations:

• It’s broadcast over clear, static-free digital signals from orbiting satellites.
• You can receive the same radio content virtually anywhere you drive throughout the U.S. and Canada without ever losing a station by going out of range.

What are disadvantages of satellites?

The Disadvantages of Satellites

• Costs are Prohibitive. Satellites are expensive.
• Signal Reception can be Spotty. Another problem with satellites is their somewhat unreliable signal.
• Propagation Delay is a Problem.
• There are No Repair Shops in Space.

What are the options for satellite radio?

A variety of options for listening out of the car include home receivers, satellite radio service for smart phones, and portable radios with docking stations for listening at home, in the car, or anywhere else. Check Sirius and XM websites for details.

How does satellite radio work and what does it do?

Satellite Radio: A satellite radio or subscription radio (SR) is basically a digital radio signal that is relayed by a communications satellite and this typically covers a wider geographical range than terrestrial radio signals. Satellite radio provides audio broadcast services in some countries, among them is the US.

Why does satellite signal use very high frequencies?

ITU and FCC have set the frequency range satellites can use at abut 1 to 40 GHz. This was agreed to a long time ago. The bands allocated to satellites are S, C, Ku, Ka etc. Since no one on the ground is allowed to use these, the satellite downlink energy is expected to cause little interference to anyone except adjacent satellites.

Why is a satellite called a communications satellite?

They are called so because they are used for communication purposes. What is a Communications Satellite? A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals through a transponder.

How does communication take place between two earth stations?

Since the satellites locate at certain height above earth, the communication takes place between any two earth stations easily via satellite. So, it overcomes the limitation of communication between two earth stations due to earth’s curvature. A satellite is a body that moves around another body in a particular path.