Method Calendar.YMD.deltat()
- Method deltat
float deltat(int unadjusted_utc)
- Description
-
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
-
The function is based on polynomials provided by NASA, and the result may differ from actual for dates after 2004.