>Geosync broadcasting satellites don't usually redirect their antennae, but >they don't illuminate the visible sphere, either. They now have truly >monumental dishes (in the 100 m diameter range), and can lay up a beam with >half-power points spaced well under 1 degree. Also, a single such dish will >typically have several feedhorns, and will cover their intended target (a >continent, for example) with 5 or more distinct signals, physically and >accurately separated. > >Ted Spencer; ted@... You, as usual, are a wealth of information. tedd -- http://sperling.com