AeroAstro Annual 1
Annual Report 2003-2004
Nowadays, we take the availability of worldwide communica- tion for granted; communication satellites bring us live coverage of events from around the world and undersea fiber- optic cables are used to provide global telephony service. However, as recent as the 1950s transatlantic communication was limited to a few dozen voice circuits and real-timecom- munication with much of the rest of the world was not possible. The concept of man made satellites provideing global com- munication coverage was first envisioned by Arthur C. Clark in his seminal article “Voices from the Sky” (Wireless World, October, 1945). He described a satellite in synchronous orbit providing communication relay services within any two points on the hemisphere and a constellation of three such satellites for providing global coverage. Clark argued that using a satellite in synchronous orbit would be more cost effec- tive and provide much better coverage than alternative terrestrialcommunication techniques. 7 It’s Coming—A Paradigm Shift in Communications Satellite Design by Eytan Modiano It’s Coming—A Paradigm Shift COMMUNICATION SATELLITE DESIGN Most existing communi- cations satellites were designed for voice and video transfer and have a difficult time handling the unique demands of Internet and other emerging types of data traffic. Design of their successors requires a paradigm shift from current technology.