FG>   Extremely accurate time is important espically for satellite tracking,
  >and even more so if you have computer controlled az-el antenna rotors. If
  >the beamwith is narrow, a few seconds off can leave you leading or 
railing
  >the sat, and maybe not hearing it at all.
As a suggestion... if accurate time is important to you, use a GPS.
Their clocks are calibrated in real time by an atomic clock in the
transmitting satellite.  Accuracy is within a few nanoseconds.
As an added benefit, a GPS is a really fun gadget, especially when
connected to a radio (obligatory on-topic word) or computer.
Ron
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