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
In message [EMAIL PROTECTED], Magnus Danielson writes:
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
In message [EMAIL PROTECTED], Bill Hawkins writes:
Not to mention the equipment that synchronizes the power grid
to UTC, seamlessly integrating leap seconds.
So far the existence of such equipment in contemporary power
grids is not really proven, is it ?
I know they try to hold the frequency
From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 18:52:59 +0100
Message-ID: [EMAIL PROTECTED]
Poul-Henning,
Even better, pulsars. They have a period that is usually the same order
of magnitude as a
In message [EMAIL PROTECTED], Magnus Danielson writes:
However, it may be stable enought for tau in the range of 1 Ms to 1Gs or so,
and that is still usefull.
Ohh, absolutely.
But how would we know ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED] | TCP/IP
From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 19:21:39 +0100
Message-ID: [EMAIL PROTECTED]
In message [EMAIL PROTECTED], Magnus Danielson writes:
However, it may be stable enought for tau in the
we could check it against the sundial !!
tom
w0kgw
- Original Message -
From: Poul-Henning Kamp [EMAIL PROTECTED]
To: Magnus Danielson [EMAIL PROTECTED]
Cc: time-nuts@febo.com
Sent: Tuesday, January 17, 2006 12:21 PM
Subject: Re: [time-nuts] List of time synchronization hardware and
Poul-Henning Kamp [EMAIL PROTECTED] wrote:
Pulsars were considered for timekeeping several times in the past, and in
every instance the winning argument was You want to base our timekeeping
on some cosmic phenomena we don't even know what is ?.
Well, look at how dependent NTP and navigation
Defense News
January 16, 2006
DoD Plan Calls For Taking GPS Away From USAF
By Michael Fabey
To counter what they view as the U.S. Air Force's weak commitment to space
programs, some Pentagon officials are proposing shifting oversight of the
Global Positioning System (GPS) satellite navigation
At 6:40 PM +0100 1/17/06, Magnus Danielson wrote:
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
From: [EMAIL PROTECTED] (Tim Shoppa)
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 17:20:40 -0500
Message-ID: [EMAIL PROTECTED]
Poul-Henning Kamp [EMAIL PROTECTED] wrote:
Pulsars were considered for timekeeping several times in the past, and
From: David Forbes [EMAIL PROTECTED]
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 15:50:58 -0700
Message-ID: [EMAIL PROTECTED]
At 6:40 PM +0100 1/17/06, Magnus Danielson wrote:
But besides that, pulsars are cool. Since the planet is
From: Hal Murray [EMAIL PROTECTED]
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 10:50:19 -0800
Message-ID: [EMAIL PROTECTED]
Hal,
I'm gonna babble some here, so the real collectors can correct me and point out
all the nitty gritty details
I don't know the details, but it is reasnoble that the GPS reference stations
positions in WGS-84 will keep the GPS coordinate system locked correctly.
Time to read-up on the WGS-84 coordinate system and its relations to time-
scales again. They do relate one way or the other.
The formulas to
From: Warner Losh [EMAIL PROTECTED]
Subject: Re: [time-nuts] List of time synchronization hardware and software
Date: Tue, 17 Jan 2006 17:55:19 -0700 (MST)
Message-ID: [EMAIL PROTECTED]
I don't know the details, but it is reasnoble that the GPS reference
stations
positions in WGS-84 will
On Tue, 17 Jan 2006 17:42:51 -0800, Tom Van Baak
[EMAIL PROTECTED] wrote:
Nice set of questions.
You can find more info if you hunt around my website:
http://www.LeapSecond.com
My very rough guess is that used Rb are available
for $100 to $500 and used Cs are available for $500
to $2500.
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