Not to mention the equipment that synchronizes the power grid to UTC, seamlessly integrating leap seconds.
It's amazing what you can stir up with an open-ended query. 1. What is the purpose of the equipment? To provide approximate time-of-day for human use or to provide precision that only a computer could appreciate? 2. What are the precision and accuracy requirements, both short and long term? How long is 'long'? Millennia? 3. What is the price range of the equipment? Does it extend to hydrogen masers? How many? 4. What are the size and weight limitations on the equipment? What's too small and what's too big? 5. What are the external power restrictions, in volts, amps and watts? What have I left off the list? Bill Hawkins _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts