[D66] De laatste schrikkelseconde?
René Oudeweg
roudeweg at gmail.com
Mon Feb 12 17:14:02 CET 2024
Profound!
37s = TAI-UTC
reinold at fedora:~/Projects/palin$ python palin.py
Enter the number of odd palindromic numbers to generate and test: 200
Prime palindromic numbers:
1 3
2 5
3 7
4 101
5 131
6 151
7 181
8 191
9 313
10 353
11 373
12 383
13 727
14 757
15 787
16 797
17 919
18 929
19 10301
20 10501
21 10601
22 11311
23 11411
24 12421
25 12721
26 12821
27 13331 <-
28 13831
29 13931
30 14341
31 14741
32 15451
33 15551
34 16061
35 16361
36 16561
37 16661 <-
reinold at fedora:$ describe "International Atomic Time" en --exact
en:
International Atomic Time
International Atomic Time (abbreviated TAI, from its French name temps
atomique international) is a high-precision atomic coordinate time
standard based on the notional passage of proper time on Earth's geoid.
TAI is a weighted average of the time kept by over 450 atomic clocks in
over 80 national laboratories worldwide. It is a continuous scale of
time, without leap seconds, and it is the principal realisation of
Terrestrial Time (with a fixed offset of epoch). It is the basis for
Coordinated Universal Time (UTC), which is used for civil timekeeping
all over the Earth's surface and which has leap seconds.
UTC deviates from TAI by a number of whole seconds. As of 1 January
2017, when another leap second was put into effect, UTC is currently
exactly 37 seconds behind TAI. The 37 seconds result from the initial
difference of 10 seconds at the start of 1972, plus 27 leap seconds in
UTC since 1972.
TAI may be reported using traditional means of specifying days, carried
over from non-uniform time standards based on the rotation of the Earth.
Specifically, both Julian days and the Gregorian calendar are used. TAI
in this form was synchronised with Universal Time at the beginning of
1958, and the two have drifted apart ever since, due primarily to the
slowing rotation of the Earth.
https://en.wikipedia.org/wiki/International_Atomic_Time
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