ASCOM Library
NovasWobble Method
Corrects a vector in the ITRF (rotating Earth-fixed system) for polar motion, and also corrects
the longitude origin (by a tiny amount) to the Terrestrial Intermediate Origin (TIO).
Definition
Namespace: ASCOM.Tools.Novas31
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea
C#
public static void Wobble(
double Tjd,
TransformationDirection Direction,
double xp,
double yp,
double[] Pos1,
ref double[] Pos2
)VB
Public Shared Sub Wobble (
Tjd As Double,
Direction As TransformationDirection,
xp As Double,
yp As Double,
Pos1 As Double(),
ByRef Pos2 As Double()
)Parameters
- Tjd Double
- TT or UT1 Julian date.
- Direction TransformationDirection
- Flag determining 'direction' of transformation; direction = 0 transformation applied, ITRS to terrestrial intermediate system direction != 0 inverse transformation applied, terrestrial intermediate system to ITRS
- xp Double
- Conventionally-defined X coordinate of Celestial Intermediate Pole with respect to ITRF pole, in arcseconds.
- yp Double
- Conventionally-defined Y coordinate of Celestial Intermediate Pole with respect to ITRF pole, in arcseconds.
- Pos1 Double
- Position vector, geocentric equatorial rectangular coordinates, referred to ITRF axes.
- Pos2 Double
- Position vector, geocentric equatorial rectangular coordinates, referred to true equator and TIO.