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Satellites for communication services have evolved quite significantly in size and power since the launch of the first commercial satellites in 1965. This has permitted a consequent reduction in the size of earth stations, and hence their cost, with a consequent increase in number. Small stations, with antennas in the order of 1.2–1.8 rn, have become very popular under the acronym VSAT, which stands for ’Very Small Aperture Terminals’....
296 p dtu 10/11/2012 176 1
Từ khóa: communication services, commercial satellites, monitoring data, VSAT networks, mạng viễn thông, công nghệ viễn thông, hệ thống thông tin