NovasLightTime Method

public static short LightTime(
	double JdTdb,
	Object3 SsObject,
	double[] PosObs,
	double TLight0,
	Accuracy Accuracy,
	ref double[] Pos,
	ref double TLight
)

Public Shared Function LightTime ( 
	JdTdb As Double,
	SsObject As Object3,
	PosObs As Double(),
	TLight0 As Double,
	Accuracy As Accuracy,
	ByRef Pos As Double(),
	ByRef TLight As Double
) As Short

Parameters

JdTdb  Double

TDB Julian date of observation.

SsObject  Object3

Structure containing the designation for the solar system body

PosObs  Double

Position vector of observer (or the geocenter), with respect to origin at solar system barycenter, referred to ICRS axes, components in AU.

TLight0  Double

First approximation to light-time, in days (can be set to 0.0 if unknown)

Accuracy  Accuracy

Selection for accuracy

Pos  Double

Position vector of body, with respect to origin at observer (or the geocenter), referred to ICRS axes, components in AU.

TLight  Double

Final light-time, in days.

Return Value

               0 ... everything OK
               1 ... algorithm failed to converge after 10 iterations
            > 10 ... error is 10 + error from function 'SolarSystem'.
            

Reference