In message [EMAIL PROTECTED], Daniel R. Tobias writes:
http://gauss.gge.unb.ca/papers.pdf/gpsworld.january01.pdf
One quibble with that article is that it gives the Global Positioning
System as an example of how humanity has been obsessed with knowing
what time it is. Actually, GPS arises from
On 13 Dec 2006 at 21:43, Steve Allen wrote:
http://gauss.gge.unb.ca/papers.pdf/gpsworld.january01.pdf
One quibble with that article is that it gives the Global Positioning
System as an example of how humanity has been obsessed with knowing
what time it is. Actually, GPS arises from our
From its outset, GPS was intended to provide position, velocity and time
(PVT). In some of his public talks, one of the people credited with inventing
GPS, Brad Parkinson, renames GPS to GPtS to drive the point home that it is a
positioning and timing service.
-- Richard Langley
On Thu, 14 Dec
- Original Message -
From: Daniel R. Tobias [EMAIL PROTECTED]
To: LEAPSECS@ROM.USNO.NAVY.MIL
Sent: Thursday, December 14, 2006 5:45 AM
Subject: Re: [LEAPSECS] what time is it, legally?
On 13 Dec 2006 at 21:43, Steve Allen wrote:
http://gauss.gge.unb.ca/papers.pdf/gpsworld.january01
Rob Seaman wrote:
I'm given to wonder how much of the friction on this mailing list is
simply due to the shortcomings in the technology that implements it.
I've appended a message I sent in August with four plots attached. Can
someone tell me whether it is readable now or was successfully
On Wed, 13 Dec 2006, Ed Davies wrote:
Rob Seaman wrote:
I'm given to wonder how much of the friction on this mailing list is
simply due to the shortcomings in the technology that implements it.
I've appended a message I sent in August with four plots attached. Can
someone tell me
From: Peter Bunclark [EMAIL PROTECTED]
Subject: Re: [LEAPSECS] what time is it, legally?
Date: Wed, 13 Dec 2006 10:05:00 +
Message-ID: [EMAIL PROTECTED]
Rob,
On Wed, 13 Dec 2006, Ed Davies wrote:
Rob Seaman wrote:
I'm given to wonder how much of the friction on this mailing list
On Dec 12, 2006, at 5:56 PM, [EMAIL PROTECTED] wrote:
To avoid such failures in the future, Tom Van Baak has agreed to
take over its management and he is now working on the technical
issues involving the migration.
Thanks for looking into that. Thanks to Tom for accepting another
(nearly)
On Tue 2006-12-12T09:18:57 -0400, Richard B. Langley hath writ:
For an overview of some of the legal issues of time see GPS and the Legal
Traceability of Time by Judah Levine in my GPS World Innovation column,
January 2001.
-- Richard Langley
Professor of Geodesy and Precision Navigation
For an overview of some of the legal issues of time see GPS and the Legal
Traceability of Time by Judah Levine in my GPS World Innovation column,
January 2001.
-- Richard Langley
Professor of Geodesy and Precision Navigation
and Contributing Editor, GPS World Magazine
On Mon, 11 Dec 2006,
Steve Allen wrote:
http://www.uakron.edu/law/docs/parrish36.1.pdf
Interesting. What this shows, to me, is that timescales are chosen
bottom-up: legislation doesn't really work. People choose a timescale
according to their needs at the time.
At the start of the narrative people used local solar
On Dec 12, 2006, at 9:38 AM, Zefram wrote:
...a lot of stuff I agree with.
Standard timezones have replaced solar time in general use
But this needs a clarification. Standard time replaced local
apparent solar time in several steps. First, clock (mean) time
replaced apparent time for civil
I view the same data differently. I see it as a progression:
Local Solar time - mean local solar time -
timezone as mean local time at one point used for many - UTC - ???
Clearly, we're moving away from solar time and towards something else.
Our ability to tell time has exceeded the
But this needs a clarification. Standard time replaced local
apparent solar time in several steps. First, clock (mean) time
replaced apparent time for civil purposes. As you can see from the
proliferation of railroad standards, these were both still local to
one place or another. Later,
From: Steve Allen [EMAIL PROTECTED]
Subject: [LEAPSECS] what time is it, legally?
Date: Mon, 11 Dec 2006 20:45:58 -0800
Message-ID: [EMAIL PROTECTED]
This history is apparently not lost to folks at NIST, for the US
senate continues to consider legislation which would explicitly
rewrite US
On Dec 12, 2006, at 1:57 PM, M. Warner Losh wrote:
I view the same data differently. I see it as a progression:
Local Solar time - mean local solar time -
timezone as mean local time at one point used for many - UTC
- ???
Clearly, we're moving away from solar time and towards something
-
From: Leap Seconds Issues
To: LEAPSECS@ROM.USNO.NAVY.MIL
Sent: 12/12/2006 7:14 PM
Subject: Re: [LEAPSECS] what time is it, legally?
I'm given to wonder how much of the friction on this mailing list is
simply due to the shortcomings in the technology that implements it.
I've appended a message I
Longtime readers of LEAPSECS will remember that in the wake of the
Torino colloquium we started joking about legal implications of civil
time in the absence of leap seconds. This was before the Internet
Mail Archive started recording the content of the list, and due to
issues at USNO it was among
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