Follow us on Facebook and Support us with your Like. 3. Need of satellite for long distance communication 6. Satellite Communication System is an important type of Wireless Communication. Conclusion: In order to understand advantages of satellite communication and disadvantages of satellite communication, one has to understand satellite communication basics. 1 indicates, these auxiliary functions consist of the following: a. Retransmission of images at narrow bandwidth (4.0 MHz) with a reduced data rate (1.75 Mb/s). Satellite Coverage — Terrain, vegetation, structures, and electronic interference all compromise message transmissions, geographically and, in most cases, temporally. Satellite television or satellite TV is a wireless system that uses communication satellites to deliver the television programs or television signals to the users or viewers. Each satellite is normally linked with four satellites within the same plane (two in front and two behind) and with one in … The main advantage of communication satellite is that it provides communication on the remote areas of the earth which are even undeveloped without investing on the ground infrastructure. Geostationary Communication Satellite are very expensive to purchase and launch. Wireless Communication and Types – Satellite communication system are the important system type of the wireless communication. For example, moon is a natural satellite of earth. Types of Satellites Active satellite It is one in which the signal is amplified and itsfrequency changed by transponder,before itsent back toearth. Satellites have proved invaluable in extending the reach of voice, data, and video communications around the globe and into the most remote regions of the world. It is very difficult to maintain a communication system 35,800 km out in the space. 5.1 Principles. The services provided by satellite communications are voice and video calling, internet, fax, television and radio channels. Satellite communication is one type of self-contained wireless communication technology, it is widely spread all over the world to allow users to stay connected almost anywhere on the earth. Connecting large and remote areas to the information grid is just one of the advantages it has over other communication systems. A MEO satellite’s distance gives it a longer time delay and weaker signal than a LEO satellite, though not as bad as a GEO satellite. Satellite Communication – D.C Agarwal, Khanna Publications, 5th Ed. Fundamentals of Satellite Communications – K.N. Voice: Satellite Communication Networks provide worldwide coverage for population density. Electromagnetic waves can be used for communication. This artificial satellite is positioned in space to facilitate the communication among the various points on the earth. Satellite radio, quite simply, is a non-terrestrial microwave transmission system utilizing a space relay station. So, this is how communication satellite works. 4. Regardless of the communication network or carrier you use, these terrestrial variables are important and can determine everything about your communication reliability. Wireless communication technology is categorized into different types depending on the distance of communication, the range of data and type of devices used. Global Positioning System (GPS) carriers and also satellite mobile phones, such as Iridium; Inmarsat providing communications at sea, land and air; WorldSpace satellite radio. It has made a major contribution to the pattern of international communication. satellite communication system is a mode of communication which uses the artificial satellite for communication. On February 11, a communication satellite owned by Iridium, a U.S. company, collided with a non-functioning Russian satellite. Satellite Communication is an essential part of information transfer around the world. The Earth's orbit has about 2,000 communication satellites that are used by government and private organizations. A communication satellite acts as a communication channel between the transmitter and the receiver based on different locations on Earth. Explain with neat diagram the antennas used in satellite communication. The characteristics of satellite communications such as Variable channel, Propagation Delay, and Limited Bandwidth, present challenges and opportunities for the service providers. There are two basic types of satellite systems that are used for satellite communication. 2.Explain briefly the “offset feed” used with paraboloidal reflector antenna stating its main advantages and disadvantages. Types of Satellite Services Fixed Service Satellites (FSS) Communication to non-moving satellites. We know that Communication refers to the exchange (sharing) of information between two or more entities, through any medium or channel. A transponder is the series of interconnected units which forms a single communication channel between the receive and transmit antennas in a communication satellite. The other satellite types based on orbit are Geostationary satellite, LEO satellite and MEO satellite. Satellite communications systems relevant to fisheries MCS use satellites that are either geostationary or orbiting. We have also discussed three types of communication satellite GEO, MEO and LEO. It allows a myriad of communication technologies to function. The devices used for wireless communication are cordless telephones, mobiles, GPS units, ZigBee technology, wireless computer parts, and satellite television, etc. This can be determined by measurement of propagation delay of signals specially transmitted for ranging purposes. S-band (2–4 GHz) Weather radar, surface ship radar, and some communications satellites, especially those of NASA for communication with ISS and Space Shuttle. As Fig. Refer Satellite tutorial >> which covers everything on satellite including satellite structure, bands, orbits, types… Both satellites broke apart, creating a field … Communication using satellites. Satellite Communications Architecture • Identify Requirements • Specify Architectures • Determine Link Data Rates • Design & Size each link • Document your rationale. The life of Communication satellite is 5-10 year. For example, moon is a natural satellite of earth. Each satellite in the constellation is a node in the fast packet switch network, and has intersatellite communication links with eight adjacent satellites. Such satellites are used for radio, television, military, internet, and telephone applications. Satellite communication is an electronic communication package placed in an orbit. Transponders. TV or television mostly uses geostationary satellites because they look stationary from the earth. The satellite microwave is basically a microwave relay station in space. Satellite range is also required for time to time. Satellite Communications – Dennis Roddy, McGraw Hill, 2nd Edition, 1996. Artificial satellites are mainly called as communication satellites which are categorized based on coverage, service type and their usage. Satellite communication - Satellite communication - How satellites work: 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. Generally Earth Station is not moving when in use. 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