In message <[EMAIL PROTECTED]>, Steve Allen writes: >In the hopes of enlightenment for this list, but without the ability >to authenticate these draft documents, I offer the following: > >http://www.ucolick.org/~sla/leapsecs/SRG7Afinalreport.doc >http://www.ucolick.org/~sla/leapsecs/PropRevITU-RTF460-6.doc
Looks good to me. >It seems that atomic clock keepers have lost all interest in the >continued existence of mean solar time, sundials, or the analemma. And why shouldn't they ? The job of atomic clock keepers is to keep TAI ticking. I really can't see any problem with the proposal above which even get into the same order of magnitude to the problems and inconvenience leapseconds are today. And I applaud them for setting a transition date which I think would spare us for even one more leap-second. As a private person living at 11°20'22.98" the sun is never in south at noon anyway and we have voluntarily moved it a further 15° away from south half the year already with daylights savings time. I already need to adjust my sundial twice a year anyway (OK, so I'm also at 55°N24' so it's not much use during winter so I don't actually bother but that's besides the point :-). As a computer nerd I can fully appreciate the problems and cost of converting existing systems to cope with larger UT1/UTC difference, but that cost would be peanuts compared to the costs of implementing leap-seconds reliably in future systems that would need it. And for that conversion cost: Just how hard is it to make a computer synchronize with NTP over the internet, pick the DUT1 up from IERS homepage and emit clocksignals which are UT1 approximations for those old computers anyway ? I know several operations computers here in Denmark which think it is 1985 because they cannot cope properly with years in a different century, people can live with that kind of quirk in old computers. Finally as goes with navigation, here in Denmark celestial navigation is now taught as a "historical interest" course... So yes, we might loose a ship or two if they for some reason rely on celestial navigation. Chances are very good that they were in dire straits already, otherwise they wouldn't have taken their eye off the GPS receiver and the radar long enough to locate the sekstant. Compare that to the number of deaths of just one major software bug triggered by a leapsecond, and things come into perspective nicely. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.