Date: Sat, 28 Aug 2010 18:31:14 -0500 From: "Bill Hawkins" <[email protected]> Subject: [time-nuts] Does GPS time reception work everywhere all of the time? Bill--
Depending on what you mean by "synchronization" you may also want to look at IEEE-1588 (Time Synch) and the work done by John Eidson (at HP/Agilent). IEEE-1588 lets you tightly synchronize devices (and data collection) over Ethernet networks. (I worked with John at HP/Agilent.) Cheers-- Bob Martin K6RTM in Silicon Valley ---------------- To: "'Discussion of precise time and frequency measurement'" <[email protected]> Message-ID: <9ef30a464fa04d31b14e6060d19ad...@cyrus> Content-Type: text/plain; charset="us-ascii" I'm involved with time synchronization of control system computers for multi-national businesses. GPS springs to mind as a way to synchronize time anywhere. Or is it? What about monsoon rains? The Internet is available almost everywhere that control computers are used, but many users prefer to use a data diode between them and the Internet. Control computers are now essential for manufacturing processes. Some of the processes run constantly for years without stopping for any kind of security update. Some of the downtimes cost millions of dollars per day. A GPS time system allows the control systems to be synchronized in time, so that messages sent periodically through the data diodes will have the correct time stamp on various events that occur in the process. But does that work everywhere all of the time? Where can I find answers? Thanks in advance, as we used to say. Bill Hawkins _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
