[time-nuts] time-nuts Digest, Vol 35, Issue 26
James R Miller
james at jrmiller.demon.co.uk
Sun Jun 10 16:02:36 EDT 2007
PRIVATE MESSAGE - OFF LIST
On 10 Jun time-nuts-request at febo.com wrote:
> Is there some way to get TT to better than a tenth of a second,
> or is the earth just too sloppy of a time keeper?
For once, the Earth's spin doesn't enter into it.
TT = TAI + 32.184s
You can get TAI from
TAI = UTC + 33s
The "32.184s" was fixed when UTC/TAI was invented. The "33s" you can get from
IERS Bulletin-A. It changes whenever there is a leap second, but so too does
UTC, and TAI thus remains continuous.
TT is the independent variable of astronomical ephemerides.
With best wishes.
James R Miller WWW/PGP: http://www.jrmiller.demon.co.uk/
Cambridge, England Stardate: 2007 Jun 10 [Sun] 1951 utc
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