TT2TDB:

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   Converts terrestrial dynamic time to barycentric dynamical 
   time.

   If jD is not entered it will use the clock Julian Date.

   Since version 1.
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   Form:
   tDB = TT2TDB( tT, jD )
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   ------
   Inputs
   ------
   tT       (:,:) Terrestrial (dynamic) time
   jD       (:,:) Julian date (days)

   -------
   Outputs
   -------
   tDB      (:,:) TTerrestrial dynamic barycenter time

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Children:

Common: Time/Date2JD
Math: MathUtils/RoundN
Math: Trigonometry/SinD