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NOVAS31CelPole Method
This function allows for the specification of celestial pole offsets for high-precision applications. Each set of offsets is a correction to the modeled position of the pole for a specific date, derived from observations and published by the IERS.

Namespace: ASCOM.Astrometry.NOVAS
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 6.0.0.0 (6.3.0.2839)
Syntax
public short CelPole(
	double Tjd,
	PoleOffsetCorrection Type,
	double Dpole1,
	double Dpole2
)

Parameters

Tjd
Type: SystemDouble
TDB or TT Julian date for pole offsets.
Type
Type: ASCOM.AstrometryPoleOffsetCorrection
Type of pole offset. 1 for corrections to angular coordinates of modeled pole referred to mean ecliptic of date, that is, delta-delta-psi and delta-delta-epsilon. 2 for corrections to components of modeled pole unit vector referred to GCRS axes, that is, dx and dy.
Dpole1
Type: SystemDouble
Value of celestial pole offset in first coordinate, (delta-delta-psi or dx) in milliarcseconds.
Dpole2
Type: SystemDouble
Value of celestial pole offset in second coordinate, (delta-delta-epsilon or dy) in milliarcseconds.

Return Value

Type: Int16
 0 ... Everything OK
 1 ... Invalid value of 'Type'.
 
Remarks