TT2UT1:
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Converts TT (Terrestrial (dynamic) Time)
to UT1 (time scale based on the rotation of the earth)
UT1 = TT - DT where DT is determined from astronomical
observations.
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Form:
jDUT1 = TT2UT1( jDTT )
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Inputs
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jDTT (1,1) Julian date Terrestrial (Dynamic) Time
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Outputs
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jDUT1 (1,1) ulian date Universal Time 1
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Children:
Common: Time/DeltaT