[time-nuts] Re: MJD 60000 this week

[Steve Allen]

On Sun 2023-02-19T16:11:03-0800 Tom Van Baak via time-nuts hath writ:
> All linear time scales have an origin date (aka epoch).
> Here are some examples:

> 01-Jan-1958 (JD 2436204.5) is TAI epoch  (MJD 36204)

There are so many "yes but"s in that.

The epoch of TAI is 1961-01-01T20:00:00 UT2(OP).
The scale A3 which became TAI was not named until then.

https://www.ucolick.org/~sla/leapsecs/taiepoch.html

Early atomic time had many hiccups.

https://www.ucolick.org/~sla/leapsecs/earlyAT.html

TAI did not exist until 1971, and even ignoring all the early hiccups
TAI is not linear because

The rate of TAI was stepped on 1977-01-01.
TAI suffered from a notable seasonal rate variation into the early 1980s.

--
Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
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