NovasGcrs2Equ Method

public static short Gcrs2Equ(
	double JdTt,
	CoordSys CoordSys,
	Accuracy Accuracy,
	double RaG,
	double DecG,
	ref double Ra,
	ref double Dec
)

Public Shared Function Gcrs2Equ ( 
	JdTt As Double,
	CoordSys As CoordSys,
	Accuracy As Accuracy,
	RaG As Double,
	DecG As Double,
	ByRef Ra As Double,
	ByRef Dec As Double
) As Short

Parameters

JdTt  Double

TT Julian date of equator to be used for output coordinates.

CoordSys  CoordSys

Coordinate system selection for output coordinates.; 0 ... mean equator and equinox of date; 1 ... true equator and equinox of date; 2 ... true equator and CIO of date

Accuracy  Accuracy

Selection for accuracy

RaG  Double

GCRS right ascension in hours.

DecG  Double

GCRS declination in degrees.

Ra  Double

Right ascension in hours, referred to specified equator and right ascension origin of date.

Dec  Double

Declination in degrees, referred to specified equator of date.

Return Value

               0 ... everything OK
            >  0 ... error from function 'Vector2RaDec'' 
            > 10 ... 10 + error from function 'CioLocation'
            > 20 ... 20 + error from function 'CioBasis'
            

This function only supports the CIO-based method.

Reference