NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Leap second today
From: Bill B
Date: 2012 Jul 01, 19:38 -0400
From: Bill B
Date: 2012 Jul 01, 19:38 -0400
On 7/1/2012 6:13 PM, Robert Bernecky wrote: > Has anyone seen this? Apparently the leap second did cause problems. > http://www.news.com.au/travel/news/leap-second-crashes-qantas-and-leaves-passengers-stranded/story-e6frfq80-1226413961235 And the technocrats scream, "No more problem-child leap seconds, ignore the universe and let TAI/technocracy reign supreme." A quote from the article referenced above, "The so-called leap second was added to electronic clocks at midnight universal time on Saturday, with atomic clocks reading 23 hours, 59 minutes and 60 seconds before then moving on to Greenwich Mean Time." No wonder there is confusion. A majority of internet articles (and some nav books) state that UTC is the same as Greenwich Mean Time (which is no longer a standard). Very seldom is a distinction made between UTC and UT1. The NA says simply UT. Some sources claim that means UT0, not UT1. (UT0 corrected for Chandler's wobble = UT1). It would be handy if the NA explanation page added one more letter or number to "UT." Getting away from the cookbook method, thinking through (and diagramming) the NA east or west adjustments for longitude given DUT1, it now seems clear the NA uses UT1 (or UT0). UT1 vs. UT0 for cel nac? WOW! Bill B