Re: GMT - UTC in Australia

2005-02-25 Thread Clive D.W. Feather
Rob Seaman said: No reasonable standard can be based on constraining the behavior of our descendants 600 years hence. In what way is the requirement |DUT| = 0.9s not constraining the behaviour of our descendants 600 years hence? While I understand your argument about the name UTC: * *EVERY*

Re: GMT - UTC in Australia

2005-02-24 Thread Rob Seaman
John Cowan says: Secular changes in time zones (if by time zone you mean LCT - UTC, as I suppose) are something we already know how to handle, as they must be taken into account when determining historical UTC/GMT to LCT conversion. Indeed, some countries jigger the dates of their semiannual time

Re: GMT - UTC in Australia

2005-02-24 Thread John Cowan
Rob Seaman scripsit: Ad hoc is not a synonym for secular. I'm pleased to see someone other than the astronomers in this conversation using the word secular, but there continues to be a fundamental confusion of Daylight Saving clock adjustments (periodic) with the silly notion of leap hours

Re: GMT - UTC in Australia

2005-02-24 Thread Steve Allen
On Wed 2005-02-23T23:02:14 -0800, Steve Allen hath writ: [ the New South Wales bill ] defines UTC as being determined by the BIPM. So it remains unclear who ultimately controls the fate of civil time in New South Wales. There is sociology behind this statement. W. Lewandowski is Principal

Re: GMT - UTC in Australia

2005-02-24 Thread Rob Seaman
There have been genuinely secular changes in zone, call them silly or not: Pacific/Enderbury (Phoenix Islands Time) changed its time zone from -11:00 to +13:00 in 1995, and Asia/Kashgar (extreme western China) changed its time zone from -5:00 to -8:00 in 1980-05 (its LMT is 5:03:56). Not silly -

Re: GMT - UTC in Australia

2005-02-24 Thread Tom Van Baak
UTC is a useful approximation to GMT. Rob, this will always be true, won't it? Whether you have 100 ms time step adjustments, or 100 x e-10 rate adjustments, leap seconds, or leap hours it seems to me there has been and will always be an honest attempt to coordinate the two scales. The

Re: GMT - UTC in Australia

2005-02-24 Thread John Cowan
Tom Van Baak scripsit: Rob, this will always be true, won't it? Whether you have 100 ms time step adjustments, or 100 x e-10 rate adjustments, leap seconds, or leap hours it seems to me there has been and will always be an honest attempt to coordinate the two scales. No, no. Leap hours are

Re: GMT - UTC in Australia and elsewhere

2005-02-23 Thread Poul-Henning Kamp
In message [EMAIL PROTECTED], Markus Kuhn writes: It seems that apart from the English versions, they all use an equivalent of either the French temps universel (universal time) or the German Weltzeit (world time). Oddly, of the ones I checked, only the Danish version explicitely mentiones UTC.

Re: GMT - UTC in Australia

2005-02-23 Thread Rob Seaman
Steve Allen writes: Australia has decided to redefine its legal time scale. http://abc.net.au/science/news/space/SpaceRepublish_1307267.htm The last line in the article implies other jurisdictions are doing the same. The exact text of the laws would be interesting in order to see whether they

Re: GMT - UTC in Australia

2005-02-23 Thread Steve Allen
On Tue 2005-02-22T18:27:36 -0800, Steve Allen hath writ: Australia has decided to redefine its legal time scale. The bill was introduced today. Details of Bill 11 are found here. http://www.parliament.nsw.gov.au/cgi-bin/isys/isyswebext.exe?op=geturi=/isysquery/irl66ce/1/doc/#hit1 The text of

GMT - UTC in Australia

2005-02-22 Thread Steve Allen
Australia has decided to redefine its legal time scale. http://abc.net.au/science/news/space/SpaceRepublish_1307267.htm The last line in the article implies other jurisdictions are doing the same. The exact text of the laws would be interesting in order to see whether they intend that UTC be