Method Calendar.YMD.deltat()
- Method deltat
floatintunadjusted_utc)- Description
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Terrestrial Dynamical Time difference from standard time.
An approximation of the difference between TDT and UTC in fractional seconds at the specified time.
The zero point is 1901-06-25T14:23:01 UTC (unix time -2162281019), ie the accumulated number of leap seconds since then is returned.
- Returns
- Note
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The function is based on polynomials provided by NASA, and the result may differ from actual for dates after 2004.