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Description de l’éditeur
Without satellites our life would be considerable different. Thus, the goal of this paper is to present this great invention of XX age, which enabled the society to speed - up the communication even more than before and opened the door to many new discoveries. The main focus is going to be concentrated on communication satellites and their main working principles as they are a part of nowadays used means of advanced communication. Firstly, the basic facts of satellites, including history, definition, types of satellites, their orbits and advantages as well as disadvantages, will be presented. Afterwards, the main functioning principles of communication satellites will be described in order to introduce the most important aspects, how the messages are transmitted. Finally, the application spheres of communication satellites will be listed and described more in detail.