Satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth . ... Approximately 2,000 artificial satellites orbiting Earth relay analog and digital signals carrying voice, video, and data to and from one or many locations worldwide.
Which concept is used for satellite communication?
Uplink frequency is the frequency at which, the first earth station is communicating with satellite. The satellite transponder converts this signal into another frequency and sends it down to the second earth station.
What are the 3 types of satellite communication?
There are three types of communication services that satellites provide: telecommunications, broadcasting, and data communications .
What is an example of a communication satellite?
Examples of military systems that use communication satellites are the MILSTAR, the DSCS , and the FLTSATCOM of the United States, NATO satellites, United Kingdom satellites (for instance Skynet), and satellites of the former Soviet Union.
What defines communication satellite and what can be the types?
Communication satellites can connect people in different locations anywhere on Earth . Communication satellites are essentially relays, allowing information to be passed around the globe via space in a number of ways. They use 3 types of orbit: GEO, LEO & HEO.
What is satellite and how it works?
A satellite is basically a self-contained communications system with the ability to receive signals from Earth and to retransmit those signals back with the use of a transponder —an integrated receiver and transmitter of radio signals.
What is the working principle of satellite?
The fundamental principle to be understood concerning satellites is that a satellite is a projectile. That is to say, a satellite is an object upon which the only force is gravity . Once launched into orbit, the only force governing the motion of a satellite is the force of gravity.
How do you communicate with satellites?
Satellites communicate by using radio waves to send signals to the antennas on the Earth . The antennas then capture those signals and process the information coming from those signals.
What are the advantages of satellite communication?
- Connecting remote assets. ...
- Driving the use of sensor networks. ...
- Transforming transportation infrastructure. ...
- Developing sustainable cities. ...
- Facilitating mobile banking and retail. ...
- Reliability. ...
- Ubiquitous coverage. ...
- Speed.
Why FM is used in satellite communication?
In satellite communications FM systems are used to use for different applications. In FM, carrier frequency is changed with the signal information [1]. This modulation systems are using where receiving technique is simple and low-cost [4].
Which is the first communication satellite?
On July 10, 1962, Telstar 1 was launched from Cape Canaveral, Florida, the U.S. as the first commercial payload in space. Two days later, the world’s first active communications satellite transmitted the first global television signal.
What is the main purpose of a satellite?
Satellites provide information about Earth’s clouds, oceans, land and air . They also can observe wildfires, volcanoes and smoke. All this information helps scientists predict weather and climate.
What is a satellite simple definition?
A satellite is a moon, planet or machine that orbits a planet or star . ... Usually, the word “satellite” refers to a machine that is launched into space and moves around Earth or another body in space. Earth and the moon are examples of natural satellites. Thousands of artificial, or man-made, satellites orbit Earth.
How do satellites get power?
Spacecraft that orbit Earth, called satellites, are close enough to the Sun that they can often use solar power. These spacecraft have solar panels which convert the Sun’s energy into electricity that powers the spacecraft. The electricity from the solar panels charges a battery in the spacecraft.
What are the types of communication satellites?
- Fixed-satellite service (FSS). ...
- Mobile Satellite Services (MSS). ...
- Broadcast Satellite Services (BSS).
Which frequency is used in satellite communication?
Ku-band (12–18 GHz)
Used for satellite communications. In Europe, Ku-band downlink is used from 10.7 GHz to 12.75 GHz for direct broadcast satellite services, such as Astra.
