NovasEeCt Method

Compute the "complementary terms" of the equation of the equinoxes consistent with IAU 2000 resolutions.

Definition

Namespace: ASCOM.Tools.Novas31
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea

C#

public static double EeCt(
	double JdHigh,
	double JdLow,
	Accuracy Accuracy
)

VB

Public Shared Function EeCt ( 
	JdHigh As Double,
	JdLow As Double,
	Accuracy As Accuracy
) As Double

Parameters

JdHigh Double: High-order part of TT Julian date.
JdLow Double: Low-order part of TT Julian date.
Accuracy Accuracy: Selection for accuracy

Return Value

Double
Complementary terms, in radians.

Remarks

1. The series used in this function was derived from Series from IERS Conventions (2003), Chapter 5, Table 5.2C. This same series was also adopted for use in the IAU's Standards of Fundamental Astronomy (SOFA) software (i.e., subroutine eect00.for and function eect00.c).

2. The low-accuracy series used in this function is a simple implementation derived from the first reference, in which terms smaller than 2 micro-arcseconds have been omitted.

3. This function is based on NOVAS FORTRAN routine 'eect2000', with the low-accuracy formula taken from NOVAS FORTRAN routine 'etilt'.

Version Information

.NET Standard

Supported in: 2.0