Re: Leap seconds in the European 50.0 Hz power grid

2003-01-30 Thread Steve Allen
On Thu 2003-01-30T22:05:51 +, Markus Kuhn hath writ: > > But the question arises as to why the spec > > can't easily be changed to indicate that it is per TAI day. > > As long as UTC is as it is currently, you don't want to do this: But I think that the further answer is this: Should it be dec

Re: Leap seconds in the European 50.0 Hz power grid

2003-01-30 Thread John Cowan
Markus Kuhn scripsit: > I doubt that this is really the case. UCPTE is happy if it can guarantee > that the grid time remains within 20 seconds of UTC. What are the long-term guarantees? -- Even a refrigerator can conform to the XML John Cowan Infoset, as long as it has a door sticker

Re: Leap seconds in the European 50.0 Hz power grid

2003-01-30 Thread Markus Kuhn
Steve Allen wrote on 2003-01-30 20:58 UTC: > On Thu 2003-01-30T12:54:09 +, Markus Kuhn hath writ: > > The UCPTE specification says that the grid phase vectors have to rotate on > > long-term average exactly 50 * 60 * 60 * 24 times per UTC day. > > Obviously the grid frequency shift after leap s

Re: Leap seconds in the European 50.0 Hz power grid

2003-01-30 Thread Steve Allen
On Thu 2003-01-30T12:54:09 +, Markus Kuhn hath writ: > VERDIN phase tracking is perhaps a somewhat pathological case. True, but I know of someone who built a household clock to use it, and for someone living in a Navy base town during the early years of the Reagan era that seemed like a pruden

Re: Leap seconds in the European 50.0 Hz power grid

2003-01-30 Thread Markus Kuhn
Steve Allen wrote on 2003-01-29 20:53 UTC: > On Wed 2003-01-29T15:05:59 -0500, John Cowan hath writ: > > I was a little too clipped. If you know all the leap seconds, you can > > convert a Unix-style timestamp to UTC reliably; if you further know all > > the timezone changes, you can convert UTC t