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NOVAS31EeCt Method

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

Namespace:  ASCOM.Astrometry.NOVAS
Assembly:  ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 3c9121baba46811fe6e53a58a05935662261416d
public double EeCt(
	double JdHigh,
	double JdLow,
	Accuracy Accuracy


Type: SystemDouble
High-order part of TT Julian date.
Type: SystemDouble
Low-order part of TT Julian date.
Type: ASCOM.AstrometryAccuracy
Selection for accuracy

Return Value

Type: Double
Complementary terms, in radians.
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 microarcseconds have been omitted.

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

See Also