NovasGeoPosVel Method

public static short GeoPosVel(
	double JdTt,
	double DeltaT,
	Accuracy Accuracy,
	Observer Obs,
	ref double[] Pos,
	ref double[] Vel
)

Public Shared Function GeoPosVel ( 
	JdTt As Double,
	DeltaT As Double,
	Accuracy As Accuracy,
	Obs As Observer,
	ByRef Pos As Double(),
	ByRef Vel As Double()
) As Short

Parameters

JdTt  Double

TT Julian date.

DeltaT  Double

Value of Delta T (= TT - UT1) at 'JdTt'.

Accuracy  Accuracy

Selection for accuracy

Obs  Observer

Data specifying the location of the observer

Pos  Double

Position vector of observer, with respect to origin at geocenter, referred to GCRS axes, components in AU.

Vel  Double

Velocity vector of observer, with respect to origin at geocenter, referred to GCRS axes, components in AU/day.

Return Value

            0 ... everything OK
            1 ... invalid value of 'Accuracy'.
            

Reference