Computes the Terrestrial Time (TT) or Terrestrial Dynamical Time (TDT) Julian date corresponding to a Barycentric Dynamical Time (TDB) Julian date.

Namespace: ASCOM.Astrometry.NOVAS
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 6.0.0.0 (6.1.1.2619)

Syntax

C#
public void Tdb2Tt(
	double TdbJd,
	ref double TtJd,
	ref double SecDiff
)
Visual Basic
Public Sub Tdb2Tt ( _
	TdbJd As Double, _
	ByRef TtJd As Double, _
	ByRef SecDiff As Double _
)
Visual C++
public:
virtual void Tdb2Tt(
	double TdbJd, 
	double% TtJd, 
	double% SecDiff
) sealed

Parameters

TdbJd
Type: System..::..Double
TDB Julian date.
TtJd
Type: System..::..Double%
TT Julian date.
SecDiff
Type: System..::..Double%
Difference 'tdb_jd'-'tt_jd', in seconds.

Remarks

Expression used in this function is a truncated form of a longer and more precise series given in: Explanatory Supplement to the Astronomical Almanac, pp. 42-44 and p. 316. The result is good to about 10 microseconds.

See Also