eors¶
-
erfa.
eors
(rnpb, s)[source]¶ Wrapper for ERFA function
eraEors
.- Parameters
- rnpbdouble array
- sdouble array
- Returns
- c_retvaldouble array
Notes
The ERFA documentation is below.
- - - - - - - - e r a E o r s - - - - - - - - Equation of the origins, given the classical NPB matrix and the quantity s. Given: rnpb double[3][3] classical nutation x precession x bias matrix s double the quantity s (the CIO locator) Returned (function value): double the equation of the origins in radians. Notes: 1) The equation of the origins is the distance between the true equinox and the celestial intermediate origin and, equivalently, the difference between Earth rotation angle and Greenwich apparent sidereal time (ERA-GST). It comprises the precession (since J2000.0) in right ascension plus the equation of the equinoxes (including the small correction terms). 2) The algorithm is from Wallace & Capitaine (2006). References: Capitaine, N. & Wallace, P.T., 2006, Astron.Astrophys. 450, 855 Wallace, P. & Capitaine, N., 2006, Astron.Astrophys. 459, 981 Copyright (C) 2013-2019, NumFOCUS Foundation. Derived, with permission, from the SOFA library. See notes at end of file.