satellite data communication

Communication Satellites - Communication satellites are normally geostationary satellites. They have devices called transponder which receive signals from an earth station and transmit them in different directions. The signals in the form of electro..

Communication satellites are normally geostationary satellites. They have devices called transponder which receive signals from an earth station and transmit them in different directions. The signals in the form of electromagnetic radiation are transmitted from t..

) use a similar mechanism. In the case of intercontinental telecommunication, two or more satellites are linked together. High frequency radio and submarine cable systems have been widely used for long- distance overseas telecommunications. The high frequency band from 3 MHz to 30 MHz has..

For global communication, a communication satellite should move..

The area of the Earth from which a satellite is visible increases with the altitude. So, satellites at higher altitudes give larger coverage. At altitudes below 10,000 km, the number of satellites required for global coverage would be excessive. At altitudes above 20,0..

Communication Systems..

(the portion of the atmosphere closest to the ground). Frequencies below the HF range travel around the curvature of the Earth, sometimes right around the globe. These ground waves, or surface waves as they are called, are one of the two original means of beyond- the- horizon propagation. All broad..

Communication Systems..

Satellite technology is very useful in collecting information about various factors of the atmosphere, which governs the weather and climatic conditions. An aerial photograph of the Country is shown daily on the television. It is also published daily in the newspapers. The data..

A common format for encoding different kinds of message signals (e.g., speech signal, video signal, computer data, etc.) for the purpose of transmissio..