[LEAPSECS] future access to solar time?

Paul Hirose cfuhb-acdgw at earthlink.net
Tue Nov 22 02:35:04 EST 2022


The Astronomical Almanac (2019) says

∆UT = UT1 - UTC

DUT1 = predicted value of ∆UT, rounded to 0.1 s, given in some radio 
time signals

(Unfortunately, this scan cuts off part of the leftmost characters. But 
you can deduce them, except perhaps Ee and Eo: equation of the equinoxes 
and equation of the origins.)

https://archive.org/details/binder1_202003/page/n121/mode/2up?view=theater


IERS Bulletins A and B say "UT1-UTC" instead of ∆UT. I think that's a 
good idea. It prevents confusion about the sign.

The current version of Bulletin A estimates UT1 will lose about 0.1 s 
with respect to atomic time during the next year.

https://www.iers.org/IERS/EN/Publications/Bulletins/bulletins.html



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