Re: [Scheme-reports] TAI epoch

[Alan Watson <alan@x>]

> Is the "astronomical second” …

When referring to times back to 1970, there are two seconds we have to consider:

(a) The pre-1972 UTC second. 

(b) The post-1972 UTC second, which is equal to the TAI second and the SI second.

When I say "prior to 1972 atomic seconds and astronomical seconds were different”, I mean that (b) was not equal to (a).

Regards,

Alan
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