Re: portable atomic clocks

From: suhas (gsuhas@pn3.vsnl.net.in)
Date: Thu Jan 18 2001 - 08:59:38 PST

  • Next message: Alan Pickup: "Decay watch: 2001 Jan 18"

    In this method of synchronization
    1. what is the time error of communication?
    2. does this depend upon where we communicate for synchronization?
    Gsuhas
    ----- Original Message -----
    From: B Magnus B{ckstr|m <b@eta.chalmers.se>
    To: Tom Wagner <sciteach1950@home.com>
    Cc: <SeeSat-L@blackadder.lmsal.com>; Tom Wagner
    <wagnert@walnutridge.pvt.k12.ia.us>
    Sent: Wednesday, January 17, 2001 4:15 PM
    Subject: Re: portable atomic clocks
    
    
    > Hi,
    >
    > On Wed, 17 Jan 2001, Tom Wagner wrote:
    >
    > >[...]
    > > Also, do any of you people from around the world have clock software in
    your
    > > computer that checks the atomic clock time off the internet at a user
    >
    > Yes,
    >
    > > defined interval? Does a computer need a special "card" to go along with
    the
    > > software that you have?
    >
    > no.
    >
    > > To any of these, what type of clock/watch/software did you choose and
    what
    > > do you think of it? Where could I get one and about how much we talking
    > > about$?
    >
    > Look for something that uses NTP.  NTP is the Network Time Protocol, which
    > is the "official" (if any one is) time synchronisation protocol on the
    > internet. That way you'll have the most reference clocks to choose from,
    > and a time-proven system.
    >
    > There are several NTP packages for MacOS, Windoze, AmigaOS, BeOS, VMS etc,
    > and most unix flavors come with an xntpd (a background NTP synchronizer).
    >
    > Look at http://www.eecis.udel.edu/~ntp/software.html for a fairly large
    > software listing, and http://www.eecis.udel.edu/~mills/ntp/clock2.htm to
    > find public clocks to syncronise with.
    >
    > Magnus
    >
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