Transforms geocentric rectangular coordinates from rotating system to non-rotating system

Namespace: ASCOM.Astrometry.NOVAS
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 6.0.0.0 (6.1.1.2619)

Syntax

C#
public void Spin(
	double st,
	double[] pos1,
	ref double[] pos2
)
Visual Basic
Public Sub Spin ( _
	st As Double, _
	pos1 As Double(), _
	ByRef pos2 As Double() _
)
Visual C++
public:
virtual void Spin(
	double st, 
	array<double>^ pos1, 
	array<double>^% pos2
) sealed

Parameters

st
Type: System..::..Double
Local apparent sidereal time at reference meridian, in hours.
pos1
Type: array<System..::..Double>[]()[][]
Vector in geocentric rectangular rotating system, referred to rotational equator and orthogonal reference meridian.
pos2
Type: array<System..::..Double>[]()[][]%
OUT: Vector in geocentric rectangular non-rotating system, referred to true equator and equinox of date.

Remarks

Transforms geocentric rectangular coordinates from rotating system based on rotational equator and orthogonal reference meridian to non-rotating system based on true equator and equinox of date.

See Also