The Future Use of VSAT Systems to Support Military Operation

VSAT is an acronym for "very small aperture terminal". It is applied to networks characterized by many small terminals and one central or hub station. Such systems are now being introduced in the U.S. for many commercial applications, primarily for two-way data communications and for video distribution. Typical antenna diameters range from 1 to 2 meters, making these stations inexpensive and easy to install. Most commercial VSAT systems provide communications between a central location with a larger antenna, typically at corporate headquarters, and many remote locations with small terminals. In this respect, the communications architecture for military requirements is similar, requiring a star configuration with communications between a command facility and many remote locations, as contrasted with a mesh configuration, where any station needs to communicate with any other station. Over 70 commercial communications satellites are now in operation worldwide, providing an ample choice for the provision of space segment for VSAT use. The use of spread spectrum techniques permits interference resistant operation, which is especially significant in a hostile environment. VSAT systems will therefore be well suited to support future military operations.