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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

   

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