SofaTttdb Method

Time scale transformation: Terrestrial Time (TT) to Barycentric Dynamical Time (TDB).

Definition

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

C#

public static int Tttdb(
	double tt1,
	double tt2,
	double dtr,
	ref double tdb1,
	ref double tdb2
)

VB

Public Shared Function Tttdb ( 
	tt1 As Double,
	tt2 As Double,
	dtr As Double,
	ByRef tdb1 As Double,
	ByRef tdb2 As Double
) As Integer

Parameters

tt1 Double: TT as a 2-part Julian Date (part 1).
tt2 Double: TT as a 2-part Julian Date (part 2).
dtr Double: TDB−TT in seconds.
tdb1 Double: Returned TDB as a 2-part Julian Date (part 1).
tdb2 Double: Returned TDB as a 2-part Julian Date (part 2).

Return Value

Int32
Status: 0 = OK.

Remarks

The dtr argument is the TDB−TT quasi-periodic component (seconds), obtainable via a time ephemeris or a model such as Dtdb(Double, Double, Double, Double, Double, Double).

Version Information

.NET Standard

Supported in: 2.0