[LEAPSECS] My FOSDEM slides

[Martin Burnicki]

michael.deckers via LEAPSECS wrote:
>
>     On 2015-03-03 21:05, Martin Burnicki wrote about
>     negative leap seconds:
>
>>  In the 7 year interval where no leap second was required/scheduled I
>> heard
>>  several people saying we might have needed a negative leap second.
>
>     Fortunately, this is not a matter of speculation.

I know.

>     An easy way to
>     see the trend of UT1 - UTC is to look at DUT1 (published in
>     Bulletin D). DUT1 is an approximation to UT1 - UTC and has
>     always stepped down (except, of course, at positive leap seconds),
>     ever since the earliest Bulletin D available on the web (1991-06-20).

Yes, but if you observe that DUT1 steps down slower and slower you can 
speculate whether it would start to step up over some years.

>     Before a negative leap seconds would be scheduled, we would see
>     DUT1 stepping up several times in a row, so there _is_ some
>     advance warning.

Agreed.


Martin
-- 
Martin Burnicki

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