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What is meant by distance insensitive communication systems in satellites?
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Why satellite is used?
Because satellites lack the geographic constraints of terrestrial systems, they are better suited for long-distance, point-to-multipoint transmissions such as television broadcasts
Are solar panels used in satellites?
Yes, they provide the power needed to operate the satellite systems for the life of the satellite, so are essential.
Which planet has the most satellites and rings?
All the gas giants are known to have rings; Saturn's are by far the most prominent. As far as moons are concerned, Jupiter and Saturn are in a virtual tie; both of them have around 60 known satellites. ______________________ If you include artificial satellites, Earth leads the pack. With only natural satellites counted, Jupiter has more moons (63 and counting) while Saturn has most of the rings. Jupiter and Uranus have very small and dim ring systems.
What are the basic elements of satellite communication systems?
Satellite communication is one particular example of wireless communication systems. Similar and maybe more familiar examples of wireless systems are radio and television broadcasting and mobile and cordless telephones. Systems of this type rely on a network of ground-based transmitters and receivers. They are commonly referred to as 'terrestrial' systems as opposed to satellite systems. these are the following important element in the satellite communication system 1.user 2.terrestrial system 3.earth station 4.repeaters user: user are located on the earth and they produces the baseband signal terrestrial system: terrestrial system can be switch or telephone line or network. the function of terrestrial system is to proceed the baseband signal to the earth station which are coming from the user earth station : Earth station is the common name for every installation located on the Earth's surface and intended for communication (transmission and/or reception) with one or more satellites. Earth stations include all devices and installations for satellite communications: handheld devices for mobile satellite telephony, briefcase satellite phones, satellite TV reception, as well as installations that are less familiar, eg VSAT stations and satellite broadcast TV stations. The term Earth station refers to the collection of equipment that is needed to perform communications via satellite: the antenna (often a dish) and the associated equipment (receiver/decoder, transmitter). repeaters: repeaters accept all the modulated R.F career in its uplink and amplifies back it to earth station in its down link
What is the glonass?
GLONASS is a constellation of satellites with a similar purpose to the US GPS system with a minimum of 24 satellites. GLONASS is operated by the Russian Federation, and finally became fully operational in 1993 with the full complement of 24 satellites. China has a similar system underway, known as COMPASS, but it has only 10 satellites operational yet, and with the aim of 30 units. A mix of geostationary and low orbit elements. IRNSS (Indian regional navigation satellite system) is also underway, but with 2 geostationary orbiting satellites operational of 7 planned. GALILEO is the navigation system being constructed by the European Union, with 4 (out of 10) of the planned satellites operational. There is also a DORIS system operated by France, but this uses quite a different system. Information from this helps ascertain the elevation of the JASON 1 and JASON 2 systems to a few cm.
What is meant by distance insensitive communication systems?
Distance is nothing but a clear demarcation of angle which the distant object makes with an eye of the observer.
What has the author M Richharia written?
M. Richharia has written: 'Satellite Communication Systems' 'Satellite communications systems' -- subject(s): Design and construction, Geostationary satellites, Artificial satellites, Artificial satellites in telecommunication 'Satellite communication systems' -- subject(s): Design and construction, Geostationary satellites, Artificial satellites, Artificial satellites in telecommunication
What was life like before satellites?
Weather reports were not accurate. Long distance communication required cables and microwave relay towers. There was no GPS navigation systems. Land was mapped slowly and expensively.
What do you use for communication in Antarctica?
Research station-centric telephone systems work well; ISat phones are available to connect with other continents, and decayed-orbit satellites are also useful for communication to other continents.
Why are satellites useful in everyday life?
They are used to reflect radio waves to improve long distance communications and they are used for GPS location systems
What is the most common way trig is used in everyday life?
Global Positioning Systems (GPS) use trigonometry. There are a number of satellites orbiting the earth. The GPS uses the time signals sent by these satellites to establish the distance to the satellites. Trigonometry is then used to find the location of the GPS unit.
How are satellite systems different than terrestrial systems?
Satellites lack the geographic constraints of terrestrial systems
Comparison between conventional cellular radio system and satellite based cellular radio system?
Satellite-based cellular systems In addition to the terrestrial systems, in recent years satellite-based telephone systems have been under construction. With such a system it is possible to make a connection with a cellular phone all around the world, especially in those regions currently not covered by a terrestrial system. In contrast with other satellite communication systems, satellite-based phone systems operate in the Low Earth Orbit (780 km high), and are therefore called LEO systems. The satellites work differently from those at a much higher orbit (36,000 km) in two major ways. First, the small distance between earth and satellite makes it possible to connect to the system with a handheld device. Second, signals can be moved overhead in between satellites without the use of base stations on the earth. In the near future, operators will supply services in which terrestrial and satellite communication are integrated. Like in the terrestrial systems, the satellites operate on certain frequencies, that have to be selected in such a way that interference is avoided. Not only frequencies are needed to communicate with handheld devices, but also to establish communication between satellites and ground stations, and between satellites mutually. cellular telecommunication networks One of the most recent applications of wireless communication is the establishment of fixed cellular telecommunication networks. In contrast to mobile cellular networks, in non-mobile or fixed systems both the transmitters and receivers are located at fixed points in the area. Fixed cellular networks provide a financially attractive alternative to the construction of conventional wired networks in developing countries, where no
What are some wireless communication systems?
Wireless communication systems include pagers, cellular phones, personal communications systems
When was Communication Theory of Secrecy Systems created?
Communication Theory of Secrecy Systems was created in 1945.
Explain how a communications satellite is used?
http://library.thinkquest.org/03oct/02144/basics/satcomm.htm Satellite Communication Satellites have now become an integral part of the worldwide communication systems. Although long-range and long distance communication took place much before the introduction of satellite systems, they had a lot of disadvantages. Point - to - point communication systems are very difficult in the case of remote & isolated locations, which are surrounded by oceans, mountains and other obstacles created by nature. The satellite is nothing more than a radio-relay station But, they have one potential advantage- The capability of a direct line of sight path to 98% (excluding the polar caps, which are in accessible to satellites) of the earth's surface. One of the most important event in the history of satellite communication took place when COMSAT or communication satellite corporation, launched four satellites within 6 years that is between 1965 to 1979. The first of these series was the 'Early Bird' , which was launched in 1965. This was the first communication station to handle worldwide commercial telephone traffic from a fixed position in space. The next series INTELSAT was a group of satellites that served 150 stations in 80 countries. ..................................... get the points and write the essay urself
What is the potential hazard to earth from solar storms?
The main danger seems to be for our satellites; a major flare could potentially cause TRILLIONS of dollars in damage, and damage our communication systems in such a way that it could take years to rebuild it.
