[LEAPSECS] CEPT ECC viewpoint on leap seconds
brooks at edlmax.com
Wed Jan 28 06:22:13 EST 2015
On 2015-01-28 05:49 AM, Brooks Harris wrote:
> On 2015-01-28 05:31 AM, mike at lumieresimaginaire.com wrote:
>> Oops - that last one got away while I was trying to quit HTML!!!
>> Le 28.01.2015 11:09, Poul-Henning Kamp a écrit :
>>> In message <54C8B26D.6050904 at edlmax.com>, Brooks Harris writes:
>>>> It says - "Until now the solution has been to introduce a 'leap
>>>> second', in other words to stop 'official/scientific' time
>>>> (Co-ordinated Universal Time, 'UTC'), for one second every so often."
>> yes. completely incorrect.
>> Hold the phone. "to stop 'official/scientific' time"?!? How
>> worrisome is it that the chair of the committee considering the Leap
>> Second question could make a statement like that?
>>> Hold the yelling: What are the chances that we can ever implement
>>> leap-seconds in a responsible fashion, if even a such persons do
>>> not grasp what it is ?
>> Probably not so much a misunderstanding as inability to
>> communicate. I wonder sometimes whether the issue is in the term Leap
>> , which implies jumping over something,
> It doesn't help. It only "leaps" on a positive Leap Seconds.
>> whereas the French term "intercalaire" indicates inserting which in
>> most cases better describes what is going on.
> But its only "inserted" on positive Leap Seconds, and omitted on
> negative. So "insert" is not a good word either.
> Also, its rarely made clear that its the counting method, the labeling
> or numbering, we are talking about - actual seconds are not inserted
> or omitted - where would they come from or go to?
> In the video industry the NTSC frame rate is 30000/1001 - 30 video
> frames in 1.001 seconds, so a "nominal" second is slightly slower that
> real-time. A frame labeling counting method to compensate is called
> "Drop frame" - it "drops" frame numbers from the count so the hr:mn:sc
> nearly match true running time.
> So it might be called "Leap or Drop Second Counting Method for TAI/UTC
> Compensation". A bit of a mouthful. "Leap Seconds" is fine so long as
> the meaning is made clear.
I should have said - We're stuck with name "Leap Seconds" and we need
to make an effort to make its meaning clear.
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