9.3.8.1 Rationale. VSATs are defined by their antenna aperture (diameter of the
parabolic dish), which can vary from 0.5 m (1.6 ft) to 2.5 m (8.125 ft). Such apertures
are considerably smaller than conventional earth stations. A VSAT network consists of
one comparatively large hub earth terminal and remote VSAT terminals. Some networks
in the United States have more than 5000 outlying VSAT terminals (a large drugstore
chain). Many such networks exist