From: [EMAIL PROTECTED] (Tim Shoppa) Subject: Re: [time-nuts] List of time synchronization hardware and software Date: Mon, 16 Jan 2006 20:20:55 -0500 Message-ID: <[EMAIL PROTECTED]>
> James Maynard <[EMAIL PROTECTED]> wrote: > > > Brooke Clarke wrote: > > > Astronomical methods, such as sundials might deserve a place on the list. > > Indeed. Sundials, or menhirs, such as those at Stonehenge! > > Even better, pulsars. They have a period that is usually the same order > of magnitude as a second, and some of them are regular enough that they > are similar in stability as an atomic clock (how many of us have > cesium beam tubes that will last for billions of years, hmmm?) How many of us have a pulsar-monitoring suitable parabol standing on the back yard? I think a new Caesium-beam cascade is *MUCH* cheaper. But besides that, pulsars are cool. Since the planet is orbiting, a few pulsar needs to be continously measured and compensation needs to be performed for the rotation. Isn't those used for monitoring the UTC deviations in VLBI? Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
