NovasTdb2Tt Method

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

Definition

Namespace: ASCOM.Tools.Novas31
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea

C#

public static void Tdb2Tt(
	double TdbJd,
	ref double TtJd,
	ref double SecDiff
)

VB

Public Shared Sub Tdb2Tt ( 
	TdbJd As Double,
	ByRef TtJd As Double,
	ByRef SecDiff As Double
)

Parameters

TdbJd Double: TDB Julian date.
TtJd Double: TT Julian date.
SecDiff 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.

Version Information

.NET Standard

Supported in: 2.0